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/*
* Copyright 2010-2022 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* Copyright 2010-2016 Mike Frysinger - <vapier@gentoo.org>
* Copyright 2022- Fabian Groffen - <grobian@gentoo.org>
*/
#include "main.h"
#include <stdlib.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <sys/types.h>
#include <unistd.h>
#include "xasprintf.h"
#include "xsystem.h"
void xsystembash(const char *command, const char **argv, int cwd)
{
pid_t p = fork();
int status;
switch (p) {
case 0: /* child */
if (cwd != AT_FDCWD) {
if (fchdir(cwd)) {
/* fchdir works with O_PATH starting w/linux-3.5 */
if (errno == EBADF) {
char *path;
xasprintf(&path, "/proc/self/fd/%i", cwd);
if (chdir(path))
errp("chdir(%s) failed", path);
} else {
errp("fchdir(%i) failed", cwd);
}
}
}
if (argv == NULL) {
execl(CONFIG_EPREFIX "bin/bash", "bash",
"--norc", "--noprofile", "-c", command, (char *)NULL);
/* Hrm, still here ? Maybe no bash ... */
_exit(execl("/bin/sh", "sh", "-c", command, (char *)NULL));
} else {
int argc = 0;
const char *a;
const char **newargv;
/* count existing args */
for (a = argv[0]; a != NULL; a++, argc++)
;
argc += 1 + 1 + 1 + 1;
newargv = xmalloc(sizeof(newargv[0]) * (argc + 1));
argc = 0;
newargv[argc++] = "bash";
newargv[argc++] = "--norc";
newargv[argc++] = "--noprofile";
newargv[argc++] = "-c";
for (a = argv[0]; a != NULL; a++)
newargv[argc++] = a;
newargv[argc] = NULL;
execv(CONFIG_EPREFIX "bin/bash", (char *const *)newargv);
/* Hrm, still here ? Maybe no bash ... */
newargv = &newargv[2]; /* shift, two args less */
argc = 0;
newargv[argc++] = "sh";
_exit(execv("/bin/sh", (char *const *)newargv));
}
default: /* parent */
waitpid(p, &status, 0);
if (WIFSIGNALED(status)) {
err("phase crashed with signal %i: %s", WTERMSIG(status),
strsignal(WTERMSIG(status)));
} else if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0)
return;
else
err("phase exited %i", WEXITSTATUS(status));
}
/* fall through */
case -1: /* fucked */
errp("xsystembash(%s) failed", command);
}
}
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