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774f668c43c14c6c6593264a1c8c9a0275b19037
neovim/src/os_unix.c
Thiago de Arruda 774f668c43 Move signal handling to libuv event loop 
This removes all signal handling code from os_unix.c to os/signal.c. Now signal
handling is done like this:

- Watchers for signals are registered with libuv default event loop
- `event_poll` continuously calls `poll_uv_loop` to produce events until it
  receives user input, SIGINT or a timeout
- Any signals received in `poll_uv_loop` will push events to a queue that is
  drained and processed by `event_poll`

Signals aren't handled directly in the libuv callback to avoid recursion in the
event loop(which isn't supported by libuv).

The same principle will apply to other events in the future: Push to a queue
from a libuv callback and drain it from `event_poll`
2014-04-01 09:46:29 -03:00

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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
* OS/2 port by Paul Slootman
* VMS merge by Zoltan Arpadffy
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* os_unix.c -- code for all flavors of Unix (BSD, SYSV, SVR4, POSIX, ...)
* Also for OS/2, using the excellent EMX package!!!
* Also for BeOS and Atari MiNT.
*
* A lot of this file was originally written by Juergen Weigert and later
* changed beyond recognition.
*/
/*
* Some systems have a prototype for select() that has (int *) instead of
* (fd_set *), which is wrong. This define removes that prototype. We define
* our own prototype below.
* Don't use it for the Mac, it causes a warning for precompiled headers.
* TODO: use a configure check for precompiled headers?
*/
# define select select_declared_wrong
#include <string.h>
#include "vim.h"
#include "os_unix.h"
#include "buffer.h"
#include "charset.h"
#include "eval.h"
#include "ex_cmds.h"
#include "fileio.h"
#include "getchar.h"
#include "main.h"
#include "mbyte.h"
#include "memline.h"
#include "message.h"
#include "misc1.h"
#include "misc2.h"
#include "garray.h"
#include "path.h"
#include "screen.h"
#include "syntax.h"
#include "term.h"
#include "ui.h"
#include "os/os.h"
#include "os/time.h"
#include "os/event.h"
#include "os/input.h"
#include "os/shell.h"
#include "os/signal.h"
#include "os_unixx.h" /* unix includes for os_unix.c only */
#ifdef HAVE_SELINUX
# include <selinux/selinux.h>
static int selinux_enabled = -1;
#endif
/*
* Use this prototype for select, some include files have a wrong prototype
*/
# undef select
#if defined(HAVE_SELECT)
extern int select(int, fd_set *, fd_set *, fd_set *, struct timeval *);
#endif
static int get_x11_title(int);
static int get_x11_icon(int);
static char_u *oldtitle = NULL;
static int did_set_title = FALSE;
static char_u *oldicon = NULL;
static int did_set_icon = FALSE;
#ifdef HAVE_UNION_WAIT
typedef union wait waitstatus;
#else
typedef int waitstatus;
#endif
static pid_t wait4pid(pid_t, waitstatus *);
static int RealWaitForChar(int, long, int *);
static int have_wildcard(int, char_u **);
static int have_dollars(int, char_u **);
static int save_patterns(int num_pat, char_u **pat, int *num_file,
char_u ***file);
/*
* Write s[len] to the screen.
*/
void mch_write(char_u *s, int len)
{
ignored = (int)write(1, (char *)s, len);
if (p_wd) /* Unix is too fast, slow down a bit more */
RealWaitForChar(read_cmd_fd, p_wd, NULL);
}
/*
* A simplistic version of setjmp() that only allows one level of using.
* Don't call twice before calling mch_endjmp()!.
* Usage:
* mch_startjmp();
* if (SETJMP(lc_jump_env) != 0)
* {
* mch_didjmp();
* EMSG("crash!");
* }
* else
* {
* do_the_work;
* mch_endjmp();
* }
* Note: Can't move SETJMP() here, because a function calling setjmp() must
* not return before the saved environment is used.
* Returns OK for normal return, FAIL when the protected code caused a
* problem and LONGJMP() was used.
*/
void mch_startjmp()
{
lc_active = TRUE;
}
void mch_endjmp()
{
lc_active = FALSE;
}
/*
* If the machine has job control, use it to suspend the program,
* otherwise fake it by starting a new shell.
*/
void mch_suspend()
{
/* BeOS does have SIGTSTP, but it doesn't work. */
#if defined(SIGTSTP) && !defined(__BEOS__)
out_flush(); /* needed to make cursor visible on some systems */
settmode(TMODE_COOK);
out_flush(); /* needed to disable mouse on some systems */
# if defined(_REENTRANT) && defined(SIGCONT)
sigcont_received = FALSE;
# endif
kill(0, SIGTSTP); /* send ourselves a STOP signal */
# if defined(_REENTRANT) && defined(SIGCONT)
/*
* Wait for the SIGCONT signal to be handled. It generally happens
* immediately, but somehow not all the time. Do not call pause()
* because there would be race condition which would hang Vim if
* signal happened in between the test of sigcont_received and the
* call to pause(). If signal is not yet received, call sleep(0)
* to just yield CPU. Signal should then be received. If somehow
* it's still not received, sleep 1, 2, 3 ms. Don't bother waiting
* further if signal is not received after 1+2+3+4 ms (not expected
* to happen).
*/
{
long wait_time;
for (wait_time = 0; !sigcont_received && wait_time <= 3L; wait_time++)
/* Loop is not entered most of the time */
os_delay(wait_time, FALSE);
}
# endif
/*
* Set oldtitle to NULL, so the current title is obtained again.
*/
vim_free(oldtitle);
oldtitle = NULL;
settmode(TMODE_RAW);
need_check_timestamps = TRUE;
did_check_timestamps = FALSE;
#else
suspend_shell();
#endif
}
void mch_init()
{
Columns = 80;
Rows = 24;
out_flush();
#ifdef MACOS_CONVERT
mac_conv_init();
#endif
event_init();
}
/*
* Check_win checks whether we have an interactive stdout.
*/
int mch_check_win(int argc, char **argv)
{
if (isatty(1))
return OK;
return FAIL;
}
/*
* Return TRUE if the input comes from a terminal, FALSE otherwise.
*/
int mch_input_isatty()
{
if (isatty(read_cmd_fd))
return TRUE;
return FALSE;
}
static int get_x11_title(int test_only)
{
return FALSE;
}
static int get_x11_icon(int test_only)
{
if (!test_only) {
if (STRNCMP(T_NAME, "builtin_", 8) == 0)
oldicon = vim_strsave(T_NAME + 8);
else
oldicon = vim_strsave(T_NAME);
}
return FALSE;
}
int mch_can_restore_title()
{
return get_x11_title(TRUE);
}
int mch_can_restore_icon()
{
return get_x11_icon(TRUE);
}
/*
* Set the window title and icon.
*/
void mch_settitle(char_u *title, char_u *icon)
{
int type = 0;
static int recursive = 0;
if (T_NAME == NULL) /* no terminal name (yet) */
return;
if (title == NULL && icon == NULL) /* nothing to do */
return;
/* When one of the X11 functions causes a deadly signal, we get here again
* recursively. Avoid hanging then (something is probably locked). */
if (recursive)
return;
++recursive;
/*
* if the window ID and the display is known, we may use X11 calls
*/
/*
* Note: if "t_ts" is set, title is set with escape sequence rather
* than x11 calls, because the x11 calls don't always work
*/
if ((type || *T_TS != NUL) && title != NULL) {
if (oldtitle == NULL
) /* first call but not in GUI, save title */
(void)get_x11_title(FALSE);
if (*T_TS != NUL) /* it's OK if t_fs is empty */
term_settitle(title);
did_set_title = TRUE;
}
if ((type || *T_CIS != NUL) && icon != NULL) {
if (oldicon == NULL
) /* first call, save icon */
get_x11_icon(FALSE);
if (*T_CIS != NUL) {
out_str(T_CIS); /* set icon start */
out_str_nf(icon);
out_str(T_CIE); /* set icon end */
out_flush();
}
did_set_icon = TRUE;
}
--recursive;
}
/*
* Restore the window/icon title.
* "which" is one of:
* 1 only restore title
* 2 only restore icon
* 3 restore title and icon
*/
void mch_restore_title(int which)
{
/* only restore the title or icon when it has been set */
mch_settitle(((which & 1) && did_set_title) ?
(oldtitle ? oldtitle : p_titleold) : NULL,
((which & 2) && did_set_icon) ? oldicon : NULL);
}
/*
* Return TRUE if "name" looks like some xterm name.
* Seiichi Sato mentioned that "mlterm" works like xterm.
*/
int vim_is_xterm(char_u *name)
{
if (name == NULL)
return FALSE;
return STRNICMP(name, "xterm", 5) == 0
|| STRNICMP(name, "nxterm", 6) == 0
|| STRNICMP(name, "kterm", 5) == 0
|| STRNICMP(name, "mlterm", 6) == 0
|| STRNICMP(name, "rxvt", 4) == 0
|| STRCMP(name, "builtin_xterm") == 0;
}
/*
* Return TRUE if "name" appears to be that of a terminal
* known to support the xterm-style mouse protocol.
* Relies on term_is_xterm having been set to its correct value.
*/
int use_xterm_like_mouse(char_u *name)
{
return name != NULL
&& (term_is_xterm || STRNICMP(name, "screen", 6) == 0);
}
/*
* Return non-zero when using an xterm mouse, according to 'ttymouse'.
* Return 1 for "xterm".
* Return 2 for "xterm2".
* Return 3 for "urxvt".
* Return 4 for "sgr".
*/
int use_xterm_mouse()
{
if (ttym_flags == TTYM_SGR)
return 4;
if (ttym_flags == TTYM_URXVT)
return 3;
if (ttym_flags == TTYM_XTERM2)
return 2;
if (ttym_flags == TTYM_XTERM)
return 1;
return 0;
}
int vim_is_iris(char_u *name)
{
if (name == NULL)
return FALSE;
return STRNICMP(name, "iris-ansi", 9) == 0
|| STRCMP(name, "builtin_iris-ansi") == 0;
}
int vim_is_vt300(char_u *name)
{
if (name == NULL)
return FALSE; /* actually all ANSI comp. terminals should be here */
/* catch VT100 - VT5xx */
return (STRNICMP(name, "vt", 2) == 0
&& vim_strchr((char_u *)"12345", name[2]) != NULL)
|| STRCMP(name, "builtin_vt320") == 0;
}
/*
* Return TRUE if "name" is a terminal for which 'ttyfast' should be set.
* This should include all windowed terminal emulators.
*/
int vim_is_fastterm(char_u *name)
{
if (name == NULL)
return FALSE;
if (vim_is_xterm(name) || vim_is_vt300(name) || vim_is_iris(name))
return TRUE;
return STRNICMP(name, "hpterm", 6) == 0
|| STRNICMP(name, "sun-cmd", 7) == 0
|| STRNICMP(name, "screen", 6) == 0
|| STRNICMP(name, "dtterm", 6) == 0;
}
/*
* Insert host name is s[len].
*/
#ifdef HAVE_SYS_UTSNAME_H
void mch_get_host_name(char_u *s, int len)
{
struct utsname vutsname;
if (uname(&vutsname) < 0)
*s = NUL;
else
vim_strncpy(s, (char_u *)vutsname.nodename, len - 1);
}
#else /* HAVE_SYS_UTSNAME_H */
# ifdef HAVE_SYS_SYSTEMINFO_H
# define gethostname(nam, len) sysinfo(SI_HOSTNAME, nam, len)
# endif
void mch_get_host_name(char_u *s, int len)
{
gethostname((char *)s, len);
s[len - 1] = NUL; /* make sure it's terminated */
}
#endif /* HAVE_SYS_UTSNAME_H */
/*
* return process ID
*/
long mch_get_pid()
{
return (long)getpid();
}
#if defined(USE_FNAME_CASE) || defined(PROTO)
/*
* Set the case of the file name, if it already exists. This will cause the
* file name to remain exactly the same.
* Only required for file systems where case is ignored and preserved.
*/
void fname_case(
char_u *name,
int len; /* buffer size, only used when name gets longer */
)
{
struct stat st;
char_u *slash, *tail;
DIR *dirp;
struct dirent *dp;
if (lstat((char *)name, &st) >= 0) {
/* Open the directory where the file is located. */
slash = vim_strrchr(name, '/');
if (slash == NULL) {
dirp = opendir(".");
tail = name;
} else {
*slash = NUL;
dirp = opendir((char *)name);
*slash = '/';
tail = slash + 1;
}
if (dirp != NULL) {
while ((dp = readdir(dirp)) != NULL) {
/* Only accept names that differ in case and are the same byte
* length. TODO: accept different length name. */
if (STRICMP(tail, dp->d_name) == 0
&& STRLEN(tail) == STRLEN(dp->d_name)) {
char_u newname[MAXPATHL + 1];
struct stat st2;
/* Verify the inode is equal. */
vim_strncpy(newname, name, MAXPATHL);
vim_strncpy(newname + (tail - name), (char_u *)dp->d_name,
MAXPATHL - (tail - name));
if (lstat((char *)newname, &st2) >= 0
&& st.st_ino == st2.st_ino
&& st.st_dev == st2.st_dev) {
STRCPY(tail, dp->d_name);
break;
}
}
}
closedir(dirp);
}
}
}
#endif
#if defined(HAVE_ACL) || defined(PROTO)
# ifdef HAVE_SYS_ACL_H
# include <sys/acl.h>
# endif
# ifdef HAVE_SYS_ACCESS_H
# include <sys/access.h>
# endif
#if defined(HAVE_SELINUX) || defined(PROTO)
/*
* Copy security info from "from_file" to "to_file".
*/
void mch_copy_sec(char_u *from_file, char_u *to_file)
{
if (from_file == NULL)
return;
if (selinux_enabled == -1)
selinux_enabled = is_selinux_enabled();
if (selinux_enabled > 0) {
security_context_t from_context = NULL;
security_context_t to_context = NULL;
if (getfilecon((char *)from_file, &from_context) < 0) {
/* If the filesystem doesn't support extended attributes,
the original had no special security context and the
target cannot have one either. */
if (errno == EOPNOTSUPP)
return;
MSG_PUTS(_("\nCould not get security context for "));
msg_outtrans(from_file);
msg_putchar('\n');
return;
}
if (getfilecon((char *)to_file, &to_context) < 0) {
MSG_PUTS(_("\nCould not get security context for "));
msg_outtrans(to_file);
msg_putchar('\n');
freecon (from_context);
return;
}
if (strcmp(from_context, to_context) != 0) {
if (setfilecon((char *)to_file, from_context) < 0) {
MSG_PUTS(_("\nCould not set security context for "));
msg_outtrans(to_file);
msg_putchar('\n');
}
}
freecon(to_context);
freecon(from_context);
}
}
#endif /* HAVE_SELINUX */
/*
* Return a pointer to the ACL of file "fname" in allocated memory.
* Return NULL if the ACL is not available for whatever reason.
*/
vim_acl_T mch_get_acl(char_u *fname)
{
vim_acl_T ret = NULL;
return ret;
}
/*
* Set the ACL of file "fname" to "acl" (unless it's NULL).
*/
void mch_set_acl(char_u *fname, vim_acl_T aclent)
{
if (aclent == NULL)
return;
}
void mch_free_acl(vim_acl_T aclent)
{
if (aclent == NULL)
return;
}
#endif
/*
* Set hidden flag for "name".
*/
void mch_hide(char_u *name)
{
/* can't hide a file */
}
/*
* Check what "name" is:
* NODE_NORMAL: file or directory (or doesn't exist)
* NODE_WRITABLE: writable device, socket, fifo, etc.
* NODE_OTHER: non-writable things
*/
int mch_nodetype(char_u *name)
{
struct stat st;
if (stat((char *)name, &st))
return NODE_NORMAL;
if (S_ISREG(st.st_mode) || S_ISDIR(st.st_mode))
return NODE_NORMAL;
if (S_ISBLK(st.st_mode)) /* block device isn't writable */
return NODE_OTHER;
/* Everything else is writable? */
return NODE_WRITABLE;
}
void mch_early_init()
{
time_init();
}
#if defined(EXITFREE) || defined(PROTO)
void mch_free_mem() {
vim_free(oldtitle);
vim_free(oldicon);
}
#endif
static void exit_scroll(void);
/*
* Output a newline when exiting.
* Make sure the newline goes to the same stream as the text.
*/
static void exit_scroll()
{
if (silent_mode)
return;
if (newline_on_exit || msg_didout) {
if (msg_use_printf()) {
if (info_message)
mch_msg("\n");
else
mch_errmsg("\r\n");
} else
out_char('\n');
} else {
restore_cterm_colors(); /* get original colors back */
msg_clr_eos_force(); /* clear the rest of the display */
windgoto((int)Rows - 1, 0); /* may have moved the cursor */
}
}
void mch_exit(int r)
{
exiting = TRUE;
{
settmode(TMODE_COOK);
mch_restore_title(3); /* restore xterm title and icon name */
/*
* When t_ti is not empty but it doesn't cause swapping terminal
* pages, need to output a newline when msg_didout is set. But when
* t_ti does swap pages it should not go to the shell page. Do this
* before stoptermcap().
*/
if (swapping_screen() && !newline_on_exit)
exit_scroll();
/* Stop termcap: May need to check for T_CRV response, which
* requires RAW mode. */
stoptermcap();
/*
* A newline is only required after a message in the alternate screen.
* This is set to TRUE by wait_return().
*/
if (!swapping_screen() || newline_on_exit)
exit_scroll();
/* Cursor may have been switched off without calling starttermcap()
* when doing "vim -u vimrc" and vimrc contains ":q". */
if (full_screen)
cursor_on();
}
out_flush();
ml_close_all(TRUE); /* remove all memfiles */
#ifdef MACOS_CONVERT
mac_conv_cleanup();
#endif
#ifdef EXITFREE
free_all_mem();
#endif
exit(r);
}
void mch_settmode(int tmode)
{
static int first = TRUE;
/* Why is NeXT excluded here (and not in os_unixx.h)? */
#if defined(ECHOE) && defined(ICANON) && (defined(HAVE_TERMIO_H) || \
defined(HAVE_TERMIOS_H)) && !defined(__NeXT__)
/*
* for "new" tty systems
*/
# ifdef HAVE_TERMIOS_H
static struct termios told;
struct termios tnew;
# else
static struct termio told;
struct termio tnew;
# endif
if (first) {
first = FALSE;
# if defined(HAVE_TERMIOS_H)
tcgetattr(read_cmd_fd, &told);
# else
ioctl(read_cmd_fd, TCGETA, &told);
# endif
}
tnew = told;
if (tmode == TMODE_RAW) {
/*
* ~ICRNL enables typing ^V^M
*/
tnew.c_iflag &= ~ICRNL;
tnew.c_lflag &= ~(ICANON | ECHO | ISIG | ECHOE
# if defined(IEXTEN) && !defined(__MINT__)
| IEXTEN /* IEXTEN enables typing ^V on SOLARIS */
/* but it breaks function keys on MINT */
# endif
);
# ifdef ONLCR /* don't map NL -> CR NL, we do it ourselves */
tnew.c_oflag &= ~ONLCR;
# endif
tnew.c_cc[VMIN] = 1; /* return after 1 char */
tnew.c_cc[VTIME] = 0; /* don't wait */
} else if (tmode == TMODE_SLEEP)
tnew.c_lflag &= ~(ECHO);
# if defined(HAVE_TERMIOS_H)
{
int n = 10;
/* A signal may cause tcsetattr() to fail (e.g., SIGCONT). Retry a
* few times. */
while (tcsetattr(read_cmd_fd, TCSANOW, &tnew) == -1
&& errno == EINTR && n > 0)
--n;
}
# else
ioctl(read_cmd_fd, TCSETA, &tnew);
# endif
#else
/*
* for "old" tty systems
*/
# ifndef TIOCSETN
# define TIOCSETN TIOCSETP /* for hpux 9.0 */
# endif
static struct sgttyb ttybold;
struct sgttyb ttybnew;
if (first) {
first = FALSE;
ioctl(read_cmd_fd, TIOCGETP, &ttybold);
}
ttybnew = ttybold;
if (tmode == TMODE_RAW) {
ttybnew.sg_flags &= ~(CRMOD | ECHO);
ttybnew.sg_flags |= RAW;
} else if (tmode == TMODE_SLEEP)
ttybnew.sg_flags &= ~(ECHO);
ioctl(read_cmd_fd, TIOCSETN, &ttybnew);
#endif
curr_tmode = tmode;
}
/*
* Try to get the code for "t_kb" from the stty setting
*
* Even if termcap claims a backspace key, the user's setting *should*
* prevail. stty knows more about reality than termcap does, and if
* somebody's usual erase key is DEL (which, for most BSD users, it will
* be), they're going to get really annoyed if their erase key starts
* doing forward deletes for no reason. (Eric Fischer)
*/
void get_stty()
{
char_u buf[2];
char_u *p;
/* Why is NeXT excluded here (and not in os_unixx.h)? */
#if defined(ECHOE) && defined(ICANON) && (defined(HAVE_TERMIO_H) || \
defined(HAVE_TERMIOS_H)) && !defined(__NeXT__)
/* for "new" tty systems */
# ifdef HAVE_TERMIOS_H
struct termios keys;
# else
struct termio keys;
# endif
# if defined(HAVE_TERMIOS_H)
if (tcgetattr(read_cmd_fd, &keys) != -1)
# else
if (ioctl(read_cmd_fd, TCGETA, &keys) != -1)
# endif
{
buf[0] = keys.c_cc[VERASE];
intr_char = keys.c_cc[VINTR];
#else
/* for "old" tty systems */
struct sgttyb keys;
if (ioctl(read_cmd_fd, TIOCGETP, &keys) != -1) {
buf[0] = keys.sg_erase;
intr_char = keys.sg_kill;
#endif
buf[1] = NUL;
add_termcode((char_u *)"kb", buf, FALSE);
/*
* If <BS> and <DEL> are now the same, redefine <DEL>.
*/
p = find_termcode((char_u *)"kD");
if (p != NULL && p[0] == buf[0] && p[1] == buf[1])
do_fixdel(NULL);
}
}
/*
* Set mouse clicks on or off.
*/
void mch_setmouse(on)
int on;
{
static int ison = FALSE;
int xterm_mouse_vers;
if (on == ison) /* return quickly if nothing to do */
return;
xterm_mouse_vers = use_xterm_mouse();
if (ttym_flags == TTYM_URXVT) {
out_str_nf((char_u *)
(on
? IF_EB("\033[?1015h", ESC_STR "[?1015h")
: IF_EB("\033[?1015l", ESC_STR "[?1015l")));
ison = on;
}
if (ttym_flags == TTYM_SGR) {
out_str_nf((char_u *)
(on
? IF_EB("\033[?1006h", ESC_STR "[?1006h")
: IF_EB("\033[?1006l", ESC_STR "[?1006l")));
ison = on;
}
if (xterm_mouse_vers > 0) {
if (on) /* enable mouse events, use mouse tracking if available */
out_str_nf((char_u *)
(xterm_mouse_vers > 1
? IF_EB("\033[?1002h", ESC_STR "[?1002h")
: IF_EB("\033[?1000h", ESC_STR "[?1000h")));
else /* disable mouse events, could probably always send the same */
out_str_nf((char_u *)
(xterm_mouse_vers > 1
? IF_EB("\033[?1002l", ESC_STR "[?1002l")
: IF_EB("\033[?1000l", ESC_STR "[?1000l")));
ison = on;
} else if (ttym_flags == TTYM_DEC) {
if (on) /* enable mouse events */
out_str_nf((char_u *)"\033[1;2'z\033[1;3'{");
else /* disable mouse events */
out_str_nf((char_u *)"\033['z");
ison = on;
}
}
/*
* Set the mouse termcode, depending on the 'term' and 'ttymouse' options.
*/
void check_mouse_termcode()
{
if (use_xterm_mouse()
&& use_xterm_mouse() != 3
) {
set_mouse_termcode(KS_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? IF_EB("\233M", CSI_STR "M")
: IF_EB("\033[M", ESC_STR "[M")));
if (*p_mouse != NUL) {
/* force mouse off and maybe on to send possibly new mouse
* activation sequence to the xterm, with(out) drag tracing. */
mch_setmouse(FALSE);
setmouse();
}
} else
del_mouse_termcode(KS_MOUSE);
/* There is no conflict, but one may type "ESC }" from Insert mode. Don't
* define it in the GUI or when using an xterm. */
if (!use_xterm_mouse()
)
set_mouse_termcode(KS_NETTERM_MOUSE,
(char_u *)IF_EB("\033}", ESC_STR "}"));
else
del_mouse_termcode(KS_NETTERM_MOUSE);
/* conflicts with xterm mouse: "\033[" and "\033[M" */
if (!use_xterm_mouse()
)
set_mouse_termcode(KS_DEC_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? IF_EB("\233",
CSI_STR) : IF_EB("\033[",
ESC_STR "[")));
else
del_mouse_termcode(KS_DEC_MOUSE);
/* same as the dec mouse */
if (use_xterm_mouse() == 3
) {
set_mouse_termcode(KS_URXVT_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? IF_EB("\233", CSI_STR)
: IF_EB("\033[", ESC_STR "[")));
if (*p_mouse != NUL) {
mch_setmouse(FALSE);
setmouse();
}
} else
del_mouse_termcode(KS_URXVT_MOUSE);
/* same as the dec mouse */
if (use_xterm_mouse() == 4
) {
set_mouse_termcode(KS_SGR_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? IF_EB("\233<", CSI_STR "<")
: IF_EB("\033[<", ESC_STR "[<")));
if (*p_mouse != NUL) {
mch_setmouse(FALSE);
setmouse();
}
} else
del_mouse_termcode(KS_SGR_MOUSE);
}
/*
* set screen mode, always fails.
*/
int mch_screenmode(arg)
char_u *arg;
{
EMSG(_(e_screenmode));
return FAIL;
}
/*
* Try to get the current window size:
* 1. with an ioctl(), most accurate method
* 2. from the environment variables LINES and COLUMNS
* 3. from the termcap
* 4. keep using the old values
* Return OK when size could be determined, FAIL otherwise.
*/
int mch_get_shellsize()
{
long rows = 0;
long columns = 0;
char_u *p;
/*
* For OS/2 use _scrsize().
*/
/*
* 1. try using an ioctl. It is the most accurate method.
*
* Try using TIOCGWINSZ first, some systems that have it also define
* TIOCGSIZE but don't have a struct ttysize.
*/
# ifdef TIOCGWINSZ
{
struct winsize ws;
int fd = 1;
/* When stdout is not a tty, use stdin for the ioctl(). */
if (!isatty(fd) && isatty(read_cmd_fd))
fd = read_cmd_fd;
if (ioctl(fd, TIOCGWINSZ, &ws) == 0) {
columns = ws.ws_col;
rows = ws.ws_row;
}
}
# else /* TIOCGWINSZ */
# ifdef TIOCGSIZE
{
struct ttysize ts;
int fd = 1;
/* When stdout is not a tty, use stdin for the ioctl(). */
if (!isatty(fd) && isatty(read_cmd_fd))
fd = read_cmd_fd;
if (ioctl(fd, TIOCGSIZE, &ts) == 0) {
columns = ts.ts_cols;
rows = ts.ts_lines;
}
}
# endif /* TIOCGSIZE */
# endif /* TIOCGWINSZ */
/*
* 2. get size from environment
* When being POSIX compliant ('|' flag in 'cpoptions') this overrules
* the ioctl() values!
*/
if (columns == 0 || rows == 0 || vim_strchr(p_cpo, CPO_TSIZE) != NULL) {
if ((p = (char_u *)os_getenv("LINES")))
rows = atoi((char *)p);
if ((p = (char_u *)os_getenv("COLUMNS")))
columns = atoi((char *)p);
}
#ifdef HAVE_TGETENT
/*
* 3. try reading "co" and "li" entries from termcap
*/
if (columns == 0 || rows == 0)
getlinecol(&columns, &rows);
#endif
/*
* 4. If everything fails, use the old values
*/
if (columns <= 0 || rows <= 0)
return FAIL;
Rows = rows;
Columns = columns;
limit_screen_size();
return OK;
}
/*
* Try to set the window size to Rows and Columns.
*/
void mch_set_shellsize()
{
if (*T_CWS) {
/*
* NOTE: if you get an error here that term_set_winsize() is
* undefined, check the output of configure. It could probably not
* find a ncurses, termcap or termlib library.
*/
term_set_winsize((int)Rows, (int)Columns);
out_flush();
screen_start(); /* don't know where cursor is now */
}
}
/*
* Rows and/or Columns has changed.
*/
void mch_new_shellsize()
{
/* Nothing to do. */
}
/*
* Wait for process "child" to end.
* Return "child" if it exited properly, <= 0 on error.
*/
static pid_t wait4pid(child, status)
pid_t child;
waitstatus *status;
{
pid_t wait_pid = 0;
while (wait_pid != child) {
/* When compiled with Python threads are probably used, in which case
* wait() sometimes hangs for no obvious reason. Use waitpid()
* instead and loop (like the GUI). Also needed for other interfaces,
* they might call system(). */
# ifdef __NeXT__
wait_pid = wait4(child, status, WNOHANG, (struct rusage *)0);
# else
wait_pid = waitpid(child, status, WNOHANG);
# endif
if (wait_pid == 0) {
/* Wait for 10 msec before trying again. */
os_delay(10L, TRUE);
continue;
}
if (wait_pid <= 0
# ifdef ECHILD
&& errno == ECHILD
# endif
)
break;
}
return wait_pid;
}
int mch_call_shell(char_u *cmd, ShellOpts opts, char_u *extra_shell_arg)
{
int tmode = cur_tmode;
# define EXEC_FAILED 122 /* Exit code when shell didn't execute. Don't use
127, some shells use that already */
pid_t pid;
pid_t wpid = 0;
pid_t wait_pid = 0;
# ifdef HAVE_UNION_WAIT
union wait status;
# else
int status = -1;
# endif
int retval = -1;
char **argv = NULL;
int i;
char_u *p;
int pty_master_fd = -1; /* for pty's */
int fd_toshell[2]; /* for pipes */
int fd_fromshell[2];
int pipe_error = FALSE;
char envbuf[50];
int did_settmode = FALSE; /* settmode(TMODE_RAW) called */
out_flush();
if (opts & kShellOptCooked)
settmode(TMODE_COOK); /* set to normal mode */
argv = shell_build_argv(cmd, extra_shell_arg);
if (argv == NULL) {
goto error;
}
/*
* For the GUI, when writing the output into the buffer and when reading
* input from the buffer: Try using a pseudo-tty to get the stdin/stdout
* of the executed command into the Vim window. Or use a pipe.
*/
if (opts & (kShellOptRead|kShellOptWrite)) {
{
pipe_error = (pipe(fd_toshell) < 0);
if (!pipe_error) { /* pipe create OK */
pipe_error = (pipe(fd_fromshell) < 0);
if (pipe_error) { /* pipe create failed */
close(fd_toshell[0]);
close(fd_toshell[1]);
}
}
if (pipe_error) {
MSG_PUTS(_("\nCannot create pipes\n"));
out_flush();
}
}
}
if (!pipe_error) { /* pty or pipe opened or not used */
if ((pid = fork()) == -1) { /* maybe we should use vfork() */
MSG_PUTS(_("\nCannot fork\n"));
if (opts & (kShellOptRead | kShellOptWrite)) {
{
close(fd_toshell[0]);
close(fd_toshell[1]);
close(fd_fromshell[0]);
close(fd_fromshell[1]);
}
}
} else if (pid == 0) { /* child */
signal_stop(); /* handle signals normally */
if (opts & (kShellOptHideMess | kShellOptExpand)) {
int fd;
/*
* Don't want to show any message from the shell. Can't just
* close stdout and stderr though, because some systems will
* break if you try to write to them after that, so we must
* use dup() to replace them with something else -- webb
* Connect stdin to /dev/null too, so ":n `cat`" doesn't hang,
* waiting for input.
*/
fd = open("/dev/null", O_RDWR | O_EXTRA, 0);
fclose(stdin);
fclose(stdout);
fclose(stderr);
/*
* If any of these open()'s and dup()'s fail, we just continue
* anyway. It's not fatal, and on most systems it will make
* no difference at all. On a few it will cause the execvp()
* to exit with a non-zero status even when the completion
* could be done, which is nothing too serious. If the open()
* or dup() failed we'd just do the same thing ourselves
* anyway -- webb
*/
if (fd >= 0) {
ignored = dup(fd); /* To replace stdin (fd 0) */
ignored = dup(fd); /* To replace stdout (fd 1) */
ignored = dup(fd); /* To replace stderr (fd 2) */
/* Don't need this now that we've duplicated it */
close(fd);
}
} else if (opts & (kShellOptRead|kShellOptWrite)) {
# ifdef HAVE_SETSID
/* Create our own process group, so that the child and all its
* children can be kill()ed. Don't do this when using pipes,
* because stdin is not a tty, we would lose /dev/tty. */
if (p_stmp) {
(void)setsid();
# if defined(SIGHUP)
/* When doing "!xterm&" and 'shell' is bash: the shell
* will exit and send SIGHUP to all processes in its
* group, killing the just started process. Ignore SIGHUP
* to avoid that. (suggested by Simon Schubert)
*/
signal(SIGHUP, SIG_IGN);
# endif
}
# endif
/* Simulate to have a dumb terminal (for now) */
os_setenv("TERM", "dumb", 1);
sprintf((char *)envbuf, "%ld", Rows);
os_setenv("ROWS", (char *)envbuf, 1);
sprintf((char *)envbuf, "%ld", Rows);
os_setenv("LINES", (char *)envbuf, 1);
sprintf((char *)envbuf, "%ld", Columns);
os_setenv("COLUMNS", (char *)envbuf, 1);
/*
* stderr is only redirected when using the GUI, so that a
* program like gpg can still access the terminal to get a
* passphrase using stderr.
*/
{
/* set up stdin for the child */
close(fd_toshell[1]);
close(0);
ignored = dup(fd_toshell[0]);
close(fd_toshell[0]);
/* set up stdout for the child */
close(fd_fromshell[0]);
close(1);
ignored = dup(fd_fromshell[1]);
close(fd_fromshell[1]);
}
}
/*
* There is no type cast for the argv, because the type may be
* different on different machines. This may cause a warning
* message with strict compilers, don't worry about it.
* Call _exit() instead of exit() to avoid closing the connection
* to the X server (esp. with GTK, which uses atexit()).
*/
execvp(argv[0], argv);
_exit(EXEC_FAILED); /* exec failed, return failure code */
} else { /* parent */
/*
* While child is running, ignore terminating signals.
* Do catch CTRL-C, so that "got_int" is set.
*/
signal_reject_deadly();
/*
* For the GUI we redirect stdin, stdout and stderr to our window.
* This is also used to pipe stdin/stdout to/from the external
* command.
*/
if (opts & (kShellOptRead|kShellOptWrite)) {
# define BUFLEN 100 /* length for buffer, pseudo tty limit is 128 */
char_u buffer[BUFLEN + 1];
int buffer_off = 0; /* valid bytes in buffer[] */
char_u ta_buf[BUFLEN + 1]; /* TypeAHead */
int ta_len = 0; /* valid bytes in ta_buf[] */
int len;
int p_more_save;
int old_State;
int c;
int toshell_fd;
int fromshell_fd;
garray_T ga;
int noread_cnt;
# if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)
struct timeval start_tv;
# endif
{
close(fd_toshell[0]);
close(fd_fromshell[1]);
toshell_fd = fd_toshell[1];
fromshell_fd = fd_fromshell[0];
}
/*
* Write to the child if there are typed characters.
* Read from the child if there are characters available.
* Repeat the reading a few times if more characters are
* available. Need to check for typed keys now and then, but
* not too often (delays when no chars are available).
* This loop is quit if no characters can be read from the pty
* (WaitForChar detected special condition), or there are no
* characters available and the child has exited.
* Only check if the child has exited when there is no more
* output. The child may exit before all the output has
* been printed.
*
* Currently this busy loops!
* This can probably dead-lock when the write blocks!
*/
p_more_save = p_more;
p_more = FALSE;
old_State = State;
State = EXTERNCMD; /* don't redraw at window resize */
if ((opts & kShellOptWrite) && toshell_fd >= 0) {
/* Fork a process that will write the lines to the
* external program. */
if ((wpid = fork()) == -1) {
MSG_PUTS(_("\nCannot fork\n"));
} else if (wpid == 0) { /* child */
linenr_T lnum = curbuf->b_op_start.lnum;
int written = 0;
char_u *lp = ml_get(lnum);
size_t l;
close(fromshell_fd);
for (;; ) {
l = STRLEN(lp + written);
if (l == 0)
len = 0;
else if (lp[written] == NL)
/* NL -> NUL translation */
len = write(toshell_fd, "", (size_t)1);
else {
char_u *s = vim_strchr(lp + written, NL);
len = write(toshell_fd, (char *)lp + written,
s == NULL ? l
: (size_t)(s - (lp + written)));
}
if (len == (int)l) {
/* Finished a line, add a NL, unless this line
* should not have one. */
if (lnum != curbuf->b_op_end.lnum
|| !curbuf->b_p_bin
|| (lnum != curbuf->b_no_eol_lnum
&& (lnum !=
curbuf->b_ml.ml_line_count
|| curbuf->b_p_eol)))
ignored = write(toshell_fd, "\n",
(size_t)1);
++lnum;
if (lnum > curbuf->b_op_end.lnum) {
/* finished all the lines, close pipe */
close(toshell_fd);
toshell_fd = -1;
break;
}
lp = ml_get(lnum);
written = 0;
} else if (len > 0)
written += len;
}
_exit(0);
} else { /* parent */
close(toshell_fd);
toshell_fd = -1;
}
}
if (opts & kShellOptRead)
ga_init(&ga, 1, BUFLEN);
noread_cnt = 0;
# if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)
gettimeofday(&start_tv, NULL);
# endif
for (;; ) {
/*
* Check if keys have been typed, write them to the child
* if there are any.
* Don't do this if we are expanding wild cards (would eat
* typeahead).
* Don't do this when filtering and terminal is in cooked
* mode, the shell command will handle the I/O. Avoids
* that a typed password is echoed for ssh or gpg command.
* Don't get characters when the child has already
* finished (wait_pid == 0).
* Don't read characters unless we didn't get output for a
* while (noread_cnt > 4), avoids that ":r !ls" eats
* typeahead.
*/
len = 0;
if (!(opts & kShellOptExpand)
&& ((opts &
(kShellOptRead|kShellOptWrite|kShellOptCooked))
!= (kShellOptRead|kShellOptWrite|kShellOptCooked)
)
&& wait_pid == 0
&& (ta_len > 0 || noread_cnt > 4)) {
if (ta_len == 0) {
/* Get extra characters when we don't have any.
* Reset the counter and timer. */
noread_cnt = 0;
# if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)
gettimeofday(&start_tv, NULL);
# endif
len = ui_inchar(ta_buf, BUFLEN, 10L, 0);
}
if (ta_len > 0 || len > 0) {
/*
* For pipes:
* Check for CTRL-C: send interrupt signal to child.
* Check for CTRL-D: EOF, close pipe to child.
*/
if (len == 1 && (pty_master_fd < 0 || cmd != NULL)) {
# ifdef SIGINT
/*
* Send SIGINT to the child's group or all
* processes in our group.
*/
if (ta_buf[ta_len] == Ctrl_C
|| ta_buf[ta_len] == intr_char) {
# ifdef HAVE_SETSID
kill(-pid, SIGINT);
# else
kill(0, SIGINT);
# endif
if (wpid > 0)
kill(wpid, SIGINT);
}
# endif
if (pty_master_fd < 0 && toshell_fd >= 0
&& ta_buf[ta_len] == Ctrl_D) {
close(toshell_fd);
toshell_fd = -1;
}
}
/* replace K_BS by <BS> and K_DEL by <DEL> */
for (i = ta_len; i < ta_len + len; ++i) {
if (ta_buf[i] == CSI && len - i > 2) {
c = TERMCAP2KEY(ta_buf[i + 1], ta_buf[i + 2]);
if (c == K_DEL || c == K_KDEL || c == K_BS) {
memmove(ta_buf + i + 1, ta_buf + i + 3,
(size_t)(len - i - 2));
if (c == K_DEL || c == K_KDEL)
ta_buf[i] = DEL;
else
ta_buf[i] = Ctrl_H;
len -= 2;
}
} else if (ta_buf[i] == '\r')
ta_buf[i] = '\n';
if (has_mbyte)
i += (*mb_ptr2len_len)(ta_buf + i,
ta_len + len - i) - 1;
}
/*
* For pipes: echo the typed characters.
* For a pty this does not seem to work.
*/
if (pty_master_fd < 0) {
for (i = ta_len; i < ta_len + len; ++i) {
if (ta_buf[i] == '\n' || ta_buf[i] == '\b')
msg_putchar(ta_buf[i]);
else if (has_mbyte) {
int l = (*mb_ptr2len)(ta_buf + i);
msg_outtrans_len(ta_buf + i, l);
i += l - 1;
} else
msg_outtrans_len(ta_buf + i, 1);
}
windgoto(msg_row, msg_col);
out_flush();
}
ta_len += len;
/*
* Write the characters to the child, unless EOF has
* been typed for pipes. Write one character at a
* time, to avoid losing too much typeahead.
* When writing buffer lines, drop the typed
* characters (only check for CTRL-C).
*/
if (opts & kShellOptWrite)
ta_len = 0;
else if (toshell_fd >= 0) {
len = write(toshell_fd, (char *)ta_buf, (size_t)1);
if (len > 0) {
ta_len -= len;
memmove(ta_buf, ta_buf + len, ta_len);
}
}
}
}
if (got_int) {
/* CTRL-C sends a signal to the child, we ignore it
* ourselves */
# ifdef HAVE_SETSID
kill(-pid, SIGINT);
# else
kill(0, SIGINT);
# endif
if (wpid > 0)
kill(wpid, SIGINT);
got_int = FALSE;
}
/*
* Check if the child has any characters to be printed.
* Read them and write them to our window. Repeat this as
* long as there is something to do, avoid the 10ms wait
* for os_inchar(), or sending typeahead characters to
* the external process.
* TODO: This should handle escape sequences, compatible
* to some terminal (vt52?).
*/
++noread_cnt;
while (RealWaitForChar(fromshell_fd, 10L, NULL)) {
len = read_eintr(fromshell_fd, buffer
+ buffer_off, (size_t)(BUFLEN - buffer_off)
);
if (len <= 0) /* end of file or error */
goto finished;
noread_cnt = 0;
if (opts & kShellOptRead) {
/* Do NUL -> NL translation, append NL separated
* lines to the current buffer. */
for (i = 0; i < len; ++i) {
if (buffer[i] == NL)
append_ga_line(&ga);
else if (buffer[i] == NUL)
ga_append(&ga, NL);
else
ga_append(&ga, buffer[i]);
}
} else if (has_mbyte) {
int l;
len += buffer_off;
buffer[len] = NUL;
/* Check if the last character in buffer[] is
* incomplete, keep these bytes for the next
* round. */
for (p = buffer; p < buffer + len; p += l) {
l = mb_cptr2len(p);
if (l == 0)
l = 1; /* NUL byte? */
else if (MB_BYTE2LEN(*p) != l)
break;
}
if (p == buffer) { /* no complete character */
/* avoid getting stuck at an illegal byte */
if (len >= 12)
++p;
else {
buffer_off = len;
continue;
}
}
c = *p;
*p = NUL;
msg_puts(buffer);
if (p < buffer + len) {
*p = c;
buffer_off = (buffer + len) - p;
memmove(buffer, p, buffer_off);
continue;
}
buffer_off = 0;
} else {
buffer[len] = NUL;
msg_puts(buffer);
}
windgoto(msg_row, msg_col);
cursor_on();
out_flush();
if (got_int)
break;
# if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H)
{
struct timeval now_tv;
long msec;
/* Avoid that we keep looping here without
* checking for a CTRL-C for a long time. Don't
* break out too often to avoid losing typeahead. */
gettimeofday(&now_tv, NULL);
msec = (now_tv.tv_sec - start_tv.tv_sec) * 1000L
+ (now_tv.tv_usec - start_tv.tv_usec) / 1000L;
if (msec > 2000) {
noread_cnt = 5;
break;
}
}
# endif
}
/* If we already detected the child has finished break the
* loop now. */
if (wait_pid == pid)
break;
/*
* Check if the child still exists, before checking for
* typed characters (otherwise we would lose typeahead).
*/
# ifdef __NeXT__
wait_pid = wait4(pid, &status, WNOHANG, (struct rusage *)0);
# else
wait_pid = waitpid(pid, &status, WNOHANG);
# endif
if ((wait_pid == (pid_t)-1 && errno == ECHILD)
|| (wait_pid == pid && WIFEXITED(status))) {
/* Don't break the loop yet, try reading more
* characters from "fromshell_fd" first. When using
* pipes there might still be something to read and
* then we'll break the loop at the "break" above. */
wait_pid = pid;
} else
wait_pid = 0;
}
finished:
p_more = p_more_save;
if (opts & kShellOptRead) {
if (ga.ga_len > 0) {
append_ga_line(&ga);
/* remember that the NL was missing */
curbuf->b_no_eol_lnum = curwin->w_cursor.lnum;
} else
curbuf->b_no_eol_lnum = 0;
ga_clear(&ga);
}
/*
* Give all typeahead that wasn't used back to ui_inchar().
*/
if (ta_len)
ui_inchar_undo(ta_buf, ta_len);
State = old_State;
if (toshell_fd >= 0)
close(toshell_fd);
close(fromshell_fd);
}
/*
* Wait until our child has exited.
* Ignore wait() returning pids of other children and returning
* because of some signal like SIGWINCH.
* Don't wait if wait_pid was already set above, indicating the
* child already exited.
*/
if (wait_pid != pid)
wait_pid = wait4pid(pid, &status);
/* Make sure the child that writes to the external program is
* dead. */
if (wpid > 0) {
kill(wpid, SIGKILL);
wait4pid(wpid, NULL);
}
/*
* Set to raw mode right now, otherwise a CTRL-C after
* catch_signals() will kill Vim.
*/
if (tmode == TMODE_RAW)
settmode(TMODE_RAW);
did_settmode = TRUE;
signal_accept_deadly();
if (WIFEXITED(status)) {
/* LINTED avoid "bitwise operation on signed value" */
retval = WEXITSTATUS(status);
if (retval != 0 && !emsg_silent) {
if (retval == EXEC_FAILED) {
MSG_PUTS(_("\nCannot execute shell "));
msg_outtrans(p_sh);
msg_putchar('\n');
} else if (!(opts & kShellOptSilent)) {
MSG_PUTS(_("\nshell returned "));
msg_outnum((long)retval);
msg_putchar('\n');
}
}
} else
MSG_PUTS(_("\nCommand terminated\n"));
}
}
shell_free_argv(argv);
error:
if (!did_settmode)
if (tmode == TMODE_RAW)
settmode(TMODE_RAW); /* set to raw mode */
resettitle();
return retval;
}
/*
* Wait "msec" msec until a character is available from file descriptor "fd".
* "msec" == 0 will check for characters once.
* "msec" == -1 will block until a character is available.
* When a GUI is being used, this will not be used for input -- webb
* Returns also, when a request from Sniff is waiting -- toni.
* Or when a Linux GPM mouse event is waiting.
*/
static int RealWaitForChar(fd, msec, check_for_gpm)
int fd;
long msec;
int *check_for_gpm;
{
int ret;
#ifdef MAY_LOOP
for (;; )
#endif
{
#ifdef MAY_LOOP
int finished = TRUE; /* default is to 'loop' just once */
#endif
#ifndef HAVE_SELECT
struct pollfd fds[6];
int nfd;
int towait = (int)msec;
fds[0].fd = fd;
fds[0].events = POLLIN;
nfd = 1;
ret = poll(fds, nfd, towait);
#else /* HAVE_SELECT */
struct timeval tv;
struct timeval *tvp;
fd_set rfds, efds;
int maxfd;
long towait = msec;
if (towait >= 0) {
tv.tv_sec = towait / 1000;
tv.tv_usec = (towait % 1000) * (1000000/1000);
tvp = &tv;
} else
tvp = NULL;
/*
* Select on ready for reading and exceptional condition (end of file).
*/
select_eintr:
FD_ZERO(&rfds);
FD_ZERO(&efds);
FD_SET(fd, &rfds);
/* For QNX select() always returns 1 if this is set. Why? */
FD_SET(fd, &efds);
maxfd = fd;
ret = select(maxfd + 1, &rfds, NULL, &efds, tvp);
# ifdef EINTR
if (ret == -1 && errno == EINTR) {
/* Check whether window has been resized, EINTR may be caused by
* SIGWINCH. FIXME this is broken for now */
/* Interrupted by a signal, need to try again. We ignore msec
* here, because we do want to check even after a timeout if
* characters are available. Needed for reading output of an
* external command after the process has finished. */
goto select_eintr;
}
# endif
#endif /* HAVE_SELECT */
#ifdef MAY_LOOP
if (finished || msec == 0)
break;
/* We're going to loop around again, find out for how long */
if (msec > 0) {
# ifdef USE_START_TV
struct timeval mtv;
/* Compute remaining wait time. */
gettimeofday(&mtv, NULL);
msec -= (mtv.tv_sec - start_tv.tv_sec) * 1000L
+ (mtv.tv_usec - start_tv.tv_usec) / 1000L;
# else
/* Guess we got interrupted halfway. */
msec = msec / 2;
# endif
if (msec <= 0)
break; /* waited long enough */
}
#endif
}
return ret > 0;
}
/*
* mch_expand_wildcards() - this code does wild-card pattern matching using
* the shell
*
* return OK for success, FAIL for error (you may lose some memory) and put
* an error message in *file.
*
* num_pat is number of input patterns
* pat is array of pointers to input patterns
* num_file is pointer to number of matched file names
* file is pointer to array of pointers to matched file names
*/
#ifndef SEEK_SET
# define SEEK_SET 0
#endif
#ifndef SEEK_END
# define SEEK_END 2
#endif
#define SHELL_SPECIAL (char_u *)"\t \"&'$;<>()\\|"
int mch_expand_wildcards(num_pat, pat, num_file, file, flags)
int num_pat;
char_u **pat;
int *num_file;
char_u ***file;
int flags; /* EW_* flags */
{
int i;
size_t len;
char_u *p;
int dir;
char_u *extra_shell_arg = NULL;
ShellOpts shellopts = kShellOptExpand | kShellOptSilent;
/*
* This is the non-OS/2 implementation (really Unix).
*/
int j;
char_u *tempname;
char_u *command;
FILE *fd;
char_u *buffer;
#define STYLE_ECHO 0 /* use "echo", the default */
#define STYLE_GLOB 1 /* use "glob", for csh */
#define STYLE_VIMGLOB 2 /* use "vimglob", for Posix sh */
#define STYLE_PRINT 3 /* use "print -N", for zsh */
#define STYLE_BT 4 /* `cmd` expansion, execute the pattern
* directly */
int shell_style = STYLE_ECHO;
int check_spaces;
static int did_find_nul = FALSE;
int ampersent = FALSE;
/* vimglob() function to define for Posix shell */
static char *sh_vimglob_func =
"vimglob() { while [ $# -ge 1 ]; do echo \"$1\"; shift; done }; vimglob >";
*num_file = 0; /* default: no files found */
*file = NULL;
/*
* If there are no wildcards, just copy the names to allocated memory.
* Saves a lot of time, because we don't have to start a new shell.
*/
if (!have_wildcard(num_pat, pat))
return save_patterns(num_pat, pat, num_file, file);
# ifdef HAVE_SANDBOX
/* Don't allow any shell command in the sandbox. */
if (sandbox != 0 && check_secure())
return FAIL;
# endif
/*
* Don't allow the use of backticks in secure and restricted mode.
*/
if (secure || restricted)
for (i = 0; i < num_pat; ++i)
if (vim_strchr(pat[i], '`') != NULL
&& (check_restricted() || check_secure()))
return FAIL;
/*
* get a name for the temp file
*/
if ((tempname = vim_tempname('o')) == NULL) {
EMSG(_(e_notmp));
return FAIL;
}
/*
* Let the shell expand the patterns and write the result into the temp
* file.
* STYLE_BT: NL separated
* If expanding `cmd` execute it directly.
* STYLE_GLOB: NUL separated
* If we use *csh, "glob" will work better than "echo".
* STYLE_PRINT: NL or NUL separated
* If we use *zsh, "print -N" will work better than "glob".
* STYLE_VIMGLOB: NL separated
* If we use *sh*, we define "vimglob()".
* STYLE_ECHO: space separated.
* A shell we don't know, stay safe and use "echo".
*/
if (num_pat == 1 && *pat[0] == '`'
&& (len = STRLEN(pat[0])) > 2
&& *(pat[0] + len - 1) == '`')
shell_style = STYLE_BT;
else if ((len = STRLEN(p_sh)) >= 3) {
if (STRCMP(p_sh + len - 3, "csh") == 0)
shell_style = STYLE_GLOB;
else if (STRCMP(p_sh + len - 3, "zsh") == 0)
shell_style = STYLE_PRINT;
}
if (shell_style == STYLE_ECHO && strstr((char *)gettail(p_sh),
"sh") != NULL)
shell_style = STYLE_VIMGLOB;
/* Compute the length of the command. We need 2 extra bytes: for the
* optional '&' and for the NUL.
* Worst case: "unset nonomatch; print -N >" plus two is 29 */
len = STRLEN(tempname) + 29;
if (shell_style == STYLE_VIMGLOB)
len += STRLEN(sh_vimglob_func);
for (i = 0; i < num_pat; ++i) {
/* Count the length of the patterns in the same way as they are put in
* "command" below. */
++len; /* add space */
for (j = 0; pat[i][j] != NUL; ++j) {
if (vim_strchr(SHELL_SPECIAL, pat[i][j]) != NULL)
++len; /* may add a backslash */
++len;
}
}
command = alloc(len);
if (command == NULL) {
/* out of memory */
vim_free(tempname);
return FAIL;
}
/*
* Build the shell command:
* - Set $nonomatch depending on EW_NOTFOUND (hopefully the shell
* recognizes this).
* - Add the shell command to print the expanded names.
* - Add the temp file name.
* - Add the file name patterns.
*/
if (shell_style == STYLE_BT) {
/* change `command; command& ` to (command; command ) */
STRCPY(command, "(");
STRCAT(command, pat[0] + 1); /* exclude first backtick */
p = command + STRLEN(command) - 1;
*p-- = ')'; /* remove last backtick */
while (p > command && vim_iswhite(*p))
--p;
if (*p == '&') { /* remove trailing '&' */
ampersent = TRUE;
*p = ' ';
}
STRCAT(command, ">");
} else {
if (flags & EW_NOTFOUND)
STRCPY(command, "set nonomatch; ");
else
STRCPY(command, "unset nonomatch; ");
if (shell_style == STYLE_GLOB)
STRCAT(command, "glob >");
else if (shell_style == STYLE_PRINT)
STRCAT(command, "print -N >");
else if (shell_style == STYLE_VIMGLOB)
STRCAT(command, sh_vimglob_func);
else
STRCAT(command, "echo >");
}
STRCAT(command, tempname);
if (shell_style != STYLE_BT)
for (i = 0; i < num_pat; ++i) {
/* Put a backslash before special
* characters, except inside ``. */
int intick = FALSE;
p = command + STRLEN(command);
*p++ = ' ';
for (j = 0; pat[i][j] != NUL; ++j) {
if (pat[i][j] == '`')
intick = !intick;
else if (pat[i][j] == '\\' && pat[i][j + 1] != NUL) {
/* Remove a backslash, take char literally. But keep
* backslash inside backticks, before a special character
* and before a backtick. */
if (intick
|| vim_strchr(SHELL_SPECIAL, pat[i][j + 1]) != NULL
|| pat[i][j + 1] == '`')
*p++ = '\\';
++j;
} else if (!intick && vim_strchr(SHELL_SPECIAL,
pat[i][j]) != NULL)
/* Put a backslash before a special character, but not
* when inside ``. */
*p++ = '\\';
/* Copy one character. */
*p++ = pat[i][j];
}
*p = NUL;
}
if (flags & EW_SILENT) {
shellopts |= kShellOptHideMess;
}
if (ampersent)
STRCAT(command, "&"); /* put the '&' after the redirection */
/*
* Using zsh -G: If a pattern has no matches, it is just deleted from
* the argument list, otherwise zsh gives an error message and doesn't
* expand any other pattern.
*/
if (shell_style == STYLE_PRINT)
extra_shell_arg = (char_u *)"-G"; /* Use zsh NULL_GLOB option */
/*
* If we use -f then shell variables set in .cshrc won't get expanded.
* vi can do it, so we will too, but it is only necessary if there is a "$"
* in one of the patterns, otherwise we can still use the fast option.
*/
else if (shell_style == STYLE_GLOB && !have_dollars(num_pat, pat))
extra_shell_arg = (char_u *)"-f"; /* Use csh fast option */
/*
* execute the shell command
*/
i = call_shell(
command,
shellopts,
extra_shell_arg
);
/* When running in the background, give it some time to create the temp
* file, but don't wait for it to finish. */
if (ampersent)
os_delay(10L, TRUE);
vim_free(command);
if (i != 0) { /* mch_call_shell() failed */
mch_remove(tempname);
vim_free(tempname);
/*
* With interactive completion, the error message is not printed.
*/
if (!(flags & EW_SILENT))
{
redraw_later_clear(); /* probably messed up screen */
msg_putchar('\n'); /* clear bottom line quickly */
cmdline_row = Rows - 1; /* continue on last line */
MSG(_(e_wildexpand));
msg_start(); /* don't overwrite this message */
}
/* If a `cmd` expansion failed, don't list `cmd` as a match, even when
* EW_NOTFOUND is given */
if (shell_style == STYLE_BT)
return FAIL;
goto notfound;
}
/*
* read the names from the file into memory
*/
fd = fopen((char *)tempname, READBIN);
if (fd == NULL) {
/* Something went wrong, perhaps a file name with a special char. */
if (!(flags & EW_SILENT)) {
MSG(_(e_wildexpand));
msg_start(); /* don't overwrite this message */
}
vim_free(tempname);
goto notfound;
}
fseek(fd, 0L, SEEK_END);
len = ftell(fd); /* get size of temp file */
fseek(fd, 0L, SEEK_SET);
buffer = alloc(len + 1);
if (buffer == NULL) {
/* out of memory */
mch_remove(tempname);
vim_free(tempname);
fclose(fd);
return FAIL;
}
i = fread((char *)buffer, 1, len, fd);
fclose(fd);
mch_remove(tempname);
if (i != (int)len) {
/* unexpected read error */
EMSG2(_(e_notread), tempname);
vim_free(tempname);
vim_free(buffer);
return FAIL;
}
vim_free(tempname);
/* file names are separated with Space */
if (shell_style == STYLE_ECHO) {
buffer[len] = '\n'; /* make sure the buffer ends in NL */
p = buffer;
for (i = 0; *p != '\n'; ++i) { /* count number of entries */
while (*p != ' ' && *p != '\n')
++p;
p = skipwhite(p); /* skip to next entry */
}
}
/* file names are separated with NL */
else if (shell_style == STYLE_BT || shell_style == STYLE_VIMGLOB) {
buffer[len] = NUL; /* make sure the buffer ends in NUL */
p = buffer;
for (i = 0; *p != NUL; ++i) { /* count number of entries */
while (*p != '\n' && *p != NUL)
++p;
if (*p != NUL)
++p;
p = skipwhite(p); /* skip leading white space */
}
}
/* file names are separated with NUL */
else {
/*
* Some versions of zsh use spaces instead of NULs to separate
* results. Only do this when there is no NUL before the end of the
* buffer, otherwise we would never be able to use file names with
* embedded spaces when zsh does use NULs.
* When we found a NUL once, we know zsh is OK, set did_find_nul and
* don't check for spaces again.
*/
check_spaces = FALSE;
if (shell_style == STYLE_PRINT && !did_find_nul) {
/* If there is a NUL, set did_find_nul, else set check_spaces */
buffer[len] = NUL;
if (len && (int)STRLEN(buffer) < (int)len)
did_find_nul = TRUE;
else
check_spaces = TRUE;
}
/*
* Make sure the buffer ends with a NUL. For STYLE_PRINT there
* already is one, for STYLE_GLOB it needs to be added.
*/
if (len && buffer[len - 1] == NUL)
--len;
else
buffer[len] = NUL;
i = 0;
for (p = buffer; p < buffer + len; ++p)
if (*p == NUL || (*p == ' ' && check_spaces)) { /* count entry */
++i;
*p = NUL;
}
if (len)
++i; /* count last entry */
}
if (i == 0) {
/*
* Can happen when using /bin/sh and typing ":e $NO_SUCH_VAR^I".
* /bin/sh will happily expand it to nothing rather than returning an
* error; and hey, it's good to check anyway -- webb.
*/
vim_free(buffer);
goto notfound;
}
*num_file = i;
*file = (char_u **)alloc(sizeof(char_u *) * i);
if (*file == NULL) {
/* out of memory */
vim_free(buffer);
return FAIL;
}
/*
* Isolate the individual file names.
*/
p = buffer;
for (i = 0; i < *num_file; ++i) {
(*file)[i] = p;
/* Space or NL separates */
if (shell_style == STYLE_ECHO || shell_style == STYLE_BT
|| shell_style == STYLE_VIMGLOB) {
while (!(shell_style == STYLE_ECHO && *p == ' ')
&& *p != '\n' && *p != NUL)
++p;
if (p == buffer + len) /* last entry */
*p = NUL;
else {
*p++ = NUL;
p = skipwhite(p); /* skip to next entry */
}
} else { /* NUL separates */
while (*p && p < buffer + len) /* skip entry */
++p;
++p; /* skip NUL */
}
}
/*
* Move the file names to allocated memory.
*/
for (j = 0, i = 0; i < *num_file; ++i) {
/* Require the files to exist. Helps when using /bin/sh */
if (!(flags & EW_NOTFOUND) && !os_file_exists((*file)[i]))
continue;
/* check if this entry should be included */
dir = (os_isdir((*file)[i]));
if ((dir && !(flags & EW_DIR)) || (!dir && !(flags & EW_FILE)))
continue;
/* Skip files that are not executable if we check for that. */
if (!dir && (flags & EW_EXEC) && !os_can_exe((*file)[i]))
continue;
p = alloc((unsigned)(STRLEN((*file)[i]) + 1 + dir));
if (p) {
STRCPY(p, (*file)[i]);
if (dir)
add_pathsep(p); /* add '/' to a directory name */
(*file)[j++] = p;
}
}
vim_free(buffer);
*num_file = j;
if (*num_file == 0) { /* rejected all entries */
vim_free(*file);
*file = NULL;
goto notfound;
}
return OK;
notfound:
if (flags & EW_NOTFOUND)
return save_patterns(num_pat, pat, num_file, file);
return FAIL;
}
static int save_patterns(num_pat, pat, num_file, file)
int num_pat;
char_u **pat;
int *num_file;
char_u ***file;
{
int i;
char_u *s;
*file = (char_u **)alloc(num_pat * sizeof(char_u *));
if (*file == NULL)
return FAIL;
for (i = 0; i < num_pat; i++) {
s = vim_strsave(pat[i]);
if (s != NULL)
/* Be compatible with expand_filename(): halve the number of
* backslashes. */
backslash_halve(s);
(*file)[i] = s;
}
*num_file = num_pat;
return OK;
}
/*
* Return TRUE if the string "p" contains a wildcard that mch_expandpath() can
* expand.
*/
int mch_has_exp_wildcard(p)
char_u *p;
{
for (; *p; mb_ptr_adv(p)) {
if (*p == '\\' && p[1] != NUL)
++p;
else if (vim_strchr((char_u *)
"*?[{'"
, *p) != NULL)
return TRUE;
}
return FALSE;
}
/*
* Return TRUE if the string "p" contains a wildcard.
* Don't recognize '~' at the end as a wildcard.
*/
int mch_has_wildcard(p)
char_u *p;
{
for (; *p; mb_ptr_adv(p)) {
if (*p == '\\' && p[1] != NUL)
++p;
else if (vim_strchr((char_u *)
"*?[{`'$"
, *p) != NULL
|| (*p == '~' && p[1] != NUL))
return TRUE;
}
return FALSE;
}
static int have_wildcard(num, file)
int num;
char_u **file;
{
int i;
for (i = 0; i < num; i++)
if (mch_has_wildcard(file[i]))
return 1;
return 0;
}
static int have_dollars(num, file)
int num;
char_u **file;
{
int i;
for (i = 0; i < num; i++)
if (vim_strchr(file[i], '$') != NULL)
return TRUE;
return FALSE;
}
#ifndef HAVE_RENAME
/*
* Scaled-down version of rename(), which is missing in Xenix.
* This version can only move regular files and will fail if the
* destination exists.
*/
int mch_rename(src, dest)
const char *src, *dest;
{
struct stat st;
if (stat(dest, &st) >= 0) /* fail if destination exists */
return -1;
if (link(src, dest) != 0) /* link file to new name */
return -1;
if (mch_remove(src) == 0) /* delete link to old name */
return 0;
return -1;
}
#endif /* !HAVE_RENAME */
#if defined(FEAT_LIBCALL) || defined(PROTO)
typedef char_u * (*STRPROCSTR)(char_u *);
typedef char_u * (*INTPROCSTR)(int);
typedef int (*STRPROCINT)(char_u *);
typedef int (*INTPROCINT)(int);
/*
* Call a DLL routine which takes either a string or int param
* and returns an allocated string.
*/
int mch_libcall(libname, funcname, argstring, argint, string_result,
number_result)
char_u *libname;
char_u *funcname;
char_u *argstring; /* NULL when using a argint */
int argint;
char_u **string_result; /* NULL when using number_result */
int *number_result;
{
# if defined(USE_DLOPEN)
void *hinstLib;
char *dlerr = NULL;
# else
shl_t hinstLib;
# endif
STRPROCSTR ProcAdd;
INTPROCSTR ProcAddI;
char_u *retval_str = NULL;
int retval_int = 0;
int success = FALSE;
/*
* Get a handle to the DLL module.
*/
# if defined(USE_DLOPEN)
/* First clear any error, it's not cleared by the dlopen() call. */
(void)dlerror();
hinstLib = dlopen((char *)libname, RTLD_LAZY
# ifdef RTLD_LOCAL
| RTLD_LOCAL
# endif
);
if (hinstLib == NULL) {
/* "dlerr" must be used before dlclose() */
dlerr = (char *)dlerror();
if (dlerr != NULL)
EMSG2(_("dlerror = \"%s\""), dlerr);
}
# else
hinstLib = shl_load((const char*)libname, BIND_IMMEDIATE|BIND_VERBOSE, 0L);
# endif
/* If the handle is valid, try to get the function address. */
if (hinstLib != NULL) {
/*
* Catch a crash when calling the library function. For example when
* using a number where a string pointer is expected.
*/
mch_startjmp();
if (SETJMP(lc_jump_env) != 0) {
success = FALSE;
# if defined(USE_DLOPEN)
dlerr = NULL;
# endif
} else
{
retval_str = NULL;
retval_int = 0;
if (argstring != NULL) {
# if defined(USE_DLOPEN)
ProcAdd = (STRPROCSTR)dlsym(hinstLib, (const char *)funcname);
dlerr = (char *)dlerror();
# else
if (shl_findsym(&hinstLib, (const char *)funcname,
TYPE_PROCEDURE, (void *)&ProcAdd) < 0)
ProcAdd = NULL;
# endif
if ((success = (ProcAdd != NULL
# if defined(USE_DLOPEN)
&& dlerr == NULL
# endif
))) {
if (string_result == NULL)
retval_int = ((STRPROCINT)ProcAdd)(argstring);
else
retval_str = (ProcAdd)(argstring);
}
} else {
# if defined(USE_DLOPEN)
ProcAddI = (INTPROCSTR)dlsym(hinstLib, (const char *)funcname);
dlerr = (char *)dlerror();
# else
if (shl_findsym(&hinstLib, (const char *)funcname,
TYPE_PROCEDURE, (void *)&ProcAddI) < 0)
ProcAddI = NULL;
# endif
if ((success = (ProcAddI != NULL
# if defined(USE_DLOPEN)
&& dlerr == NULL
# endif
))) {
if (string_result == NULL)
retval_int = ((INTPROCINT)ProcAddI)(argint);
else
retval_str = (ProcAddI)(argint);
}
}
/* Save the string before we free the library. */
/* Assume that a "1" or "-1" result is an illegal pointer. */
if (string_result == NULL)
*number_result = retval_int;
else if (retval_str != NULL
&& retval_str != (char_u *)1
&& retval_str != (char_u *)-1)
*string_result = vim_strsave(retval_str);
}
mch_endjmp();
# ifdef SIGHASARG
if (lc_signal != 0) {
int i;
/* try to find the name of this signal */
for (i = 0; signal_info[i].sig != -1; i++)
if (lc_signal == signal_info[i].sig)
break;
EMSG2("E368: got SIG%s in libcall()", signal_info[i].name);
}
# endif
# if defined(USE_DLOPEN)
/* "dlerr" must be used before dlclose() */
if (dlerr != NULL)
EMSG2(_("dlerror = \"%s\""), dlerr);
/* Free the DLL module. */
(void)dlclose(hinstLib);
# else
(void)shl_unload(hinstLib);
# endif
}
if (!success) {
EMSG2(_(e_libcall), funcname);
return FAIL;
}
return OK;
}
#endif
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