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aa23d2f835e32c01b318712459ba7b9f55922469
neovim/src/nvim/os_unix.c
Thiago de Arruda aa23d2f835 msgpack-rpc: Accept method names in requests
2014-08-29 22:08:58 -03:00

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/*
* 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 BeOS and Atari MiNT.
*
* A lot of this file was originally written by Juergen Weigert and later
* changed beyond recognition.
*/
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <string.h>
#include "nvim/api/private/handle.h"
#include "nvim/vim.h"
#include "nvim/ascii.h"
#include "nvim/os_unix.h"
#include "nvim/buffer.h"
#include "nvim/charset.h"
#include "nvim/eval.h"
#include "nvim/ex_cmds.h"
#include "nvim/fileio.h"
#include "nvim/getchar.h"
#include "nvim/main.h"
#include "nvim/mbyte.h"
#include "nvim/memline.h"
#include "nvim/memory.h"
#include "nvim/message.h"
#include "nvim/misc1.h"
#include "nvim/misc2.h"
#include "nvim/garray.h"
#include "nvim/path.h"
#include "nvim/screen.h"
#include "nvim/strings.h"
#include "nvim/syntax.h"
#include "nvim/tempfile.h"
#include "nvim/term.h"
#include "nvim/types.h"
#include "nvim/ui.h"
#include "nvim/os/os.h"
#include "nvim/os/time.h"
#include "nvim/os/event.h"
#include "nvim/os/input.h"
#include "nvim/os/shell.h"
#include "nvim/os/signal.h"
#include "nvim/os/job.h"
#include "nvim/os/msgpack_rpc.h"
#if defined(HAVE_SYS_IOCTL_H)
# include <sys/ioctl.h>
#endif
#ifdef HAVE_STROPTS_H
# include <stropts.h>
#endif
#if defined(HAVE_TERMIOS_H)
# include <termios.h>
#endif
#ifdef HAVE_SELINUX
# include <selinux/selinux.h>
static int selinux_enabled = -1;
#endif
#ifdef INCLUDE_GENERATED_DECLARATIONS
# include "os_unix.c.generated.h"
#endif
static char_u *oldtitle = NULL;
static int did_set_title = FALSE;
static char_u *oldicon = NULL;
static int did_set_icon = FALSE;
/*
* Write s[len] to the screen.
*/
void mch_write(char_u *s, int len)
{
if (embedded_mode) {
// TODO(tarruda): This is a temporary hack to stop Neovim from writing
// messages to stdout in embedded mode. In the future, embedded mode will
// be the only possibility(GUIs will always start neovim with a msgpack-rpc
// over stdio) and this function won't exist.
//
// The reason for this is because before Neovim fully migrates to a
// msgpack-rpc-driven architecture, we must have a fully functional
// UI working
return;
}
ignored = (int)write(1, (char *)s, len);
if (p_wd) /* Unix is too fast, slow down a bit more */
os_microdelay(p_wd, false);
}
/*
* If the machine has job control, use it to suspend the program,
* otherwise fake it by starting a new shell.
*/
void mch_suspend(void)
{
/* 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.
*/
free(oldtitle);
oldtitle = NULL;
settmode(TMODE_RAW);
need_check_timestamps = TRUE;
did_check_timestamps = FALSE;
#endif
}
void mch_init(void)
{
Columns = 80;
Rows = 24;
out_flush();
#ifdef MACOS_CONVERT
mac_conv_init();
#endif
msgpack_rpc_init();
event_init();
}
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(void)
{
return get_x11_title(TRUE);
}
int mch_can_restore_icon(void)
{
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(void)
{
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;
}
#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 */
)
{
char_u *slash, *tail;
DIR *dirp;
struct dirent *dp;
FileInfo file_info;
if (os_get_file_info_link((char *)name, &file_info)) {
/* 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];
/* Verify the inode is equal. */
STRLCPY(newname, name, MAXPATHL + 1);
STRLCPY(newname + (tail - name), dp->d_name,
MAXPATHL - (tail - name) + 1);
FileInfo file_info_new;
if (os_get_file_info_link((char *)newname, &file_info_new)
&& os_file_info_id_equal(&file_info, &file_info_new)) {
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(void)
{
handle_init();
time_init();
}
#if defined(EXITFREE) || defined(PROTO)
void mch_free_mem(void)
{
free(oldtitle);
free(oldicon);
}
#endif
/*
* Output a newline when exiting.
* Make sure the newline goes to the same stream as the text.
*/
static void exit_scroll(void)
{
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;
event_teardown();
{
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(void)
{
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(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
? "\033[?1015h"
: "\033[?1015l"));
ison = on;
}
if (ttym_flags == TTYM_SGR) {
out_str_nf((char_u *)
(on
? "\033[?1006h"
: "\033[?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
? "\033[?1002h"
: "\033[?1000h"));
else /* disable mouse events, could probably always send the same */
out_str_nf((char_u *)
(xterm_mouse_vers > 1
? "\033[?1002l"
: "\033[?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(void)
{
if (use_xterm_mouse()
&& use_xterm_mouse() != 3
) {
set_mouse_termcode(KS_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? "\233M"
: "\033[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 *)"\033}");
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)
? "\233" : "\033["));
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)
? "\233"
: "\033["));
if (*p_mouse != NUL) {
mch_setmouse(FALSE);
setmouse();
}
} else
del_mouse_termcode(KS_URXVT_MOUSE);
/* There is no conflict with xterm mouse */
if (use_xterm_mouse() == 4
) {
set_mouse_termcode(KS_SGR_MOUSE, (char_u *)(term_is_8bit(T_NAME)
? "\233<"
: "\033[<"));
if (*p_mouse != NUL) {
mch_setmouse(FALSE);
setmouse();
}
} else
del_mouse_termcode(KS_SGR_MOUSE);
}
/*
* 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(void)
{
long rows = 0;
long columns = 0;
char_u *p;
/*
* 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(void)
{
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 */
}
}
/*
* 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(int num_pat, char_u **pat, int *num_file,
char_u ***file,
int flags /* EW_* flags */
)
{
int i;
size_t len;
char_u *p;
bool dir;
char_u *extra_shell_arg = NULL;
ShellOpts shellopts = kShellOptExpand | kShellOptSilent;
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)) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
# 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()) == 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 *)path_tail(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 = xmalloc(len);
/*
* 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);
free(command);
if (i != 0) { /* mch_call_shell() failed */
os_remove((char *)tempname);
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 */
}
free(tempname);
goto notfound;
}
fseek(fd, 0L, SEEK_END);
len = ftell(fd); /* get size of temp file */
fseek(fd, 0L, SEEK_SET);
buffer = xmalloc(len + 1);
i = fread((char *)buffer, 1, len, fd);
fclose(fd);
os_remove((char *)tempname);
if (i != (int)len) {
/* unexpected read error */
EMSG2(_(e_notread), tempname);
free(tempname);
free(buffer);
return FAIL;
}
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.
*/
free(buffer);
goto notfound;
}
*num_file = i;
*file = (char_u **)xmalloc(sizeof(char_u *) * i);
/*
* 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 = xmalloc(STRLEN((*file)[i]) + 1 + dir);
STRCPY(p, (*file)[i]);
if (dir)
add_pathsep(p); /* add '/' to a directory name */
(*file)[j++] = p;
}
free(buffer);
*num_file = j;
if (*num_file == 0) { /* rejected all entries */
free(*file);
*file = NULL;
goto notfound;
}
return OK;
notfound:
if (flags & EW_NOTFOUND) {
save_patterns(num_pat, pat, num_file, file);
return OK;
}
return FAIL;
}
static void save_patterns(int num_pat, char_u **pat, int *num_file,
char_u ***file)
{
int i;
char_u *s;
*file = xmalloc((size_t)num_pat * sizeof(char_u *));
for (i = 0; i < num_pat; i++) {
s = vim_strsave(pat[i]);
/* Be compatible with expand_filename(): halve the number of
* backslashes. */
backslash_halve(s);
(*file)[i] = s;
}
*num_file = num_pat;
}
/*
* Return TRUE if the string "p" contains a wildcard that mch_expandpath() can
* expand.
*/
int mch_has_exp_wildcard(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(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(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(int num, char_u **file)
{
int i;
for (i = 0; i < num; i++)
if (vim_strchr(file[i], '$') != NULL)
return TRUE;
return FALSE;
}
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