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/*
* utility funcs
*
* Copyright 2005-2014 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*/
#include <stdlib.h>
#include <sys/wait.h>
static void xsystem(const char *command)
{
if (unlikely(system(command)))
errp("system(%s) failed", command);
}
static void xsystembash(const char *command, int cwd)
{
pid_t p = vfork();
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);
}
execl("/bin/bash", "bash", "--norc", "--noprofile", "-c", command, NULL);
/* Hrm, still here ? Maybe no bash ... */
_exit(execl("/bin/sh", "sh", "-c", command, NULL));
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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