61 lines
3.0 KiB
C
61 lines
3.0 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/bits/weaken.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/hefty/spawn.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/paths.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/stdio/stdio.h"
|
|
#include "libc/str/str.h"
|
|
|
|
/**
|
|
* Launches program with system command interpreter.
|
|
*
|
|
* @param cmdline is an interpreted Turing-complete command
|
|
* @return -1 if child process couldn't be created, otherwise a wait
|
|
* status that can be accessed using macros like WEXITSTATUS(s)
|
|
*/
|
|
int system(const char *cmdline) {
|
|
char comspec[128];
|
|
int rc, pid, wstatus;
|
|
const char *prog, *arg;
|
|
if (weaken(fflush)) weaken(fflush)(NULL);
|
|
if (cmdline) {
|
|
if ((pid = fork()) == -1) return -1;
|
|
if (!pid) {
|
|
strcpy(comspec, kNtSystemDirectory);
|
|
strcat(comspec, "cmd.exe");
|
|
prog = !IsWindows() ? _PATH_BSHELL : comspec;
|
|
arg = !IsWindows() ? "-c" : "/C";
|
|
execve(prog, (char *const[]){prog, arg, cmdline, NULL}, environ);
|
|
_exit(errno);
|
|
} else if (wait4(pid, &wstatus, 0, NULL) != -1) {
|
|
return wstatus;
|
|
} else {
|
|
return -1;
|
|
}
|
|
} else if (IsWindows()) {
|
|
return true;
|
|
} else {
|
|
return fileexists(_PATH_BSHELL);
|
|
}
|
|
}
|