mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
f531acc8f9
- Invent openatemp() API - Invent O_UNLINK open flag - Introduce getenv_secure() API - Remove `git pull` from cosmocc - Fix utimes() when path is NULL - Fix mktemp() to never return NULL - Fix utimensat() UTIME_OMIT on XNU - Improve utimensat() code for RHEL5 - Turn `argv[0]` C:/ to /C/ on Windows - Introduce tmpnam() and tmpnam_r() APIs - Fix more const issues with internal APIs - Permit utimes() on WIN32 in O_RDONLY mode - Fix fdopendir() to check fd is a directory - Fix recent crash regression in landlock make - Fix futimens(AT_FDCWD, NULL) to return EBADF - Use workaround so `make -j` doesn't fork bomb - Rename dontdiscard to __wur (just like glibc) - Fix st_size for WIN32 symlinks containing UTF-8 - Introduce stdio ext APIs needed by GNU coreutils - Fix lstat() on WIN32 for symlinks to directories - Move some constants from normalize.inc to limits.h - Fix segv with memchr() and memcmp() overlapping page - Implement POSIX fflush() behavior for reader streams - Implement AT_SYMLINK_NOFOLLOW for utimensat() on WIN32 - Don't change read-only status of existing files on WIN32 - Correctly handle `0x[^[:xdigit:]]` case in strtol() functions
75 lines
3.4 KiB
C
75 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/limits.h"
|
|
#include "libc/mem/alloca.h"
|
|
#include "libc/mem/mem.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Executes program, with path environment search.
|
|
*
|
|
* This function is a wrapper of the execve() system call that does path
|
|
* resolution. The `PATH` environment variable is taken from your global
|
|
* `environ` rather than the `envp` argument.
|
|
*
|
|
* @param prog is the program to launch
|
|
* @param argv is [file,argv₁..argvₙ₋₁,NULL]
|
|
* @param envp is ["key=val",...,NULL]
|
|
* @return doesn't return on success, otherwise -1 w/ errno
|
|
* @asyncsignalsafe
|
|
* @vforksafe
|
|
*/
|
|
int execvpe(const char *prog, char *const argv[], char *const *envp) {
|
|
size_t i;
|
|
char *exe, **argv2;
|
|
char pathbuf[PATH_MAX];
|
|
|
|
// validate memory
|
|
if (IsAsan() &&
|
|
(!__asan_is_valid_str(prog) || !__asan_is_valid_strlist(argv))) {
|
|
return efault();
|
|
}
|
|
|
|
if (strchr(prog, '/')) {
|
|
return execve(prog, argv, envp);
|
|
}
|
|
|
|
// resolve path of executable
|
|
if (!(exe = commandv(prog, pathbuf, sizeof(pathbuf)))) {
|
|
return -1;
|
|
}
|
|
|
|
// change argv[0] to resolved path if it's ambiguous
|
|
// otherwise the program won't have much luck finding itself
|
|
if (argv[0] && *prog != '/' && *exe == '/' && !strcmp(prog, argv[0])) {
|
|
for (i = 0; argv[i++];) (void)0;
|
|
argv2 = alloca(i * sizeof(*argv));
|
|
memcpy(argv2, argv, i * sizeof(*argv));
|
|
argv2[0] = exe;
|
|
argv = argv2;
|
|
}
|
|
|
|
// execute program
|
|
// tail call shouldn't be possible
|
|
return execve(exe, argv, envp);
|
|
}
|