2c2a7f54ab
Open nohup.out write-only instead of not specifying the access permissions instead of getting undefined behavior (which probably results in stdout not being writable).
49 lines
901 B
C
49 lines
901 B
C
/* See LICENSE file for copyright and license details. */
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
|
|
#include "util.h"
|
|
|
|
static void
|
|
usage(void)
|
|
{
|
|
eprintf("usage: %s cmd [arg ...]\n", argv0);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
int fd, savederrno;
|
|
|
|
ARGBEGIN {
|
|
default:
|
|
usage();
|
|
} ARGEND
|
|
|
|
if (!argc)
|
|
usage();
|
|
|
|
if (signal(SIGHUP, SIG_IGN) == SIG_ERR)
|
|
enprintf(127, "signal HUP:");
|
|
|
|
if (isatty(STDOUT_FILENO)) {
|
|
if ((fd = open("nohup.out", O_WRONLY | O_APPEND | O_CREAT, S_IRUSR | S_IWUSR)) < 0)
|
|
enprintf(127, "open nohup.out:");
|
|
if (dup2(fd, STDOUT_FILENO) < 0)
|
|
enprintf(127, "dup2:");
|
|
close(fd);
|
|
}
|
|
if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
|
|
enprintf(127, "dup2:");
|
|
|
|
execvp(argv[0], argv);
|
|
savederrno = errno;
|
|
weprintf("execvp %s:", argv[0]);
|
|
|
|
_exit(126 + (savederrno == ENOENT));
|
|
}
|