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win: jobstart(), system(): $PATHEXT-resolve exe

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Windows: In order for jobstart(['foo']), system(['foo']) to find
"foo.cmd", we must replace "foo" with "foo.cmd" before sending `argv` to
process_spawn().

Rationale: jobstart([…]), system([…]) "executable" semantics should be
consistent with the VimL executable() function.

fix #9569
related: #10554
This commit is contained in:
Justin M. Keyes
2019-07-21 16:37:07 +02:00
parent 9d0f8224c9
commit b08dc3ec19
4 changed files with 28 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/nvim/eval.c
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@@ -12084,10 +12084,11 @@ static void f_jobresize(typval_T *argvars, typval_T *rettv, FunPtr fptr)
/// @param[out] executable Returns `false` if argv[0] is not executable.
///
/// @returns Result of `shell_build_argv()` if `cmd_tv` is a String.
/// Else, string values of `cmd_tv` copied to a (char **) list.
/// Else, string values of `cmd_tv` copied to a (char **) list with
/// argv[0] resolved to full path ($PATHEXT-resolved on Windows).
static char **tv_to_argv(typval_T *cmd_tv, const char **cmd, bool *executable)
{
if (cmd_tv->v_type == VAR_STRING) {
if (cmd_tv->v_type == VAR_STRING) { // String => "shell semantics".
const char *cmd_str = tv_get_string(cmd_tv);
if (cmd) {
*cmd = cmd_str;
@@ -12107,16 +12108,17 @@ static char **tv_to_argv(typval_T *cmd_tv, const char **cmd, bool *executable)
return NULL;
}
const char *exe = tv_get_string_chk(TV_LIST_ITEM_TV(tv_list_first(argl)));
if (!exe || !os_can_exe((const char_u *)exe, NULL, true)) {
if (exe && executable) {
const char *arg0 = tv_get_string_chk(TV_LIST_ITEM_TV(tv_list_first(argl)));
char_u *exe_resolved = NULL;
if (!arg0 || !os_can_exe((const char_u *)arg0, &exe_resolved, true)) {
if (arg0 && executable) {
*executable = false;
}
return NULL;
}
if (cmd) {
*cmd = exe;
*cmd = exe_resolved;
}
// Build the argument vector
@@ -12127,10 +12129,15 @@ static char **tv_to_argv(typval_T *cmd_tv, const char **cmd, bool *executable)
if (!a) {
// Did emsg in tv_get_string_chk; just deallocate argv.
shell_free_argv(argv);
xfree(exe_resolved);
return NULL;
}
argv[i++] = xstrdup(a);
});
// Replace argv[0] with absolute path. The only reason for this is to make
// $PATHEXT work on Windows with jobstart([…]). #9569
xfree(argv[0]);
argv[0] = exe_resolved;
return argv;
}