sbase/nohup.c

53 lines
957 B
C
Raw Normal View History

2011-06-18 05:41:28 +00:00
/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include "util.h"
enum { Error = 127, Found = 126 };
2013-06-14 18:20:47 +00:00
static void
usage(void)
{
eprintf("usage: %s command [argument...]\n", argv0);
}
2011-06-18 05:41:28 +00:00
int
main(int argc, char *argv[])
{
int fd;
2013-06-14 18:20:47 +00:00
ARGBEGIN {
default:
usage();
} ARGEND;
if(argc == 0)
usage();
2011-06-18 05:41:28 +00:00
2011-06-24 07:33:08 +00:00
if(signal(SIGHUP, SIG_IGN) == SIG_ERR)
enprintf(Error, "signal HUP:");
2013-06-14 18:20:47 +00:00
2011-06-18 05:41:28 +00:00
if(isatty(STDOUT_FILENO)) {
2013-06-14 18:20:47 +00:00
if((fd = open("nohup.out", O_APPEND|O_CREAT,
S_IRUSR|S_IWUSR)) == -1) {
2011-06-18 05:41:28 +00:00
enprintf(Error, "open nohup.out:");
2013-06-14 18:20:47 +00:00
}
2011-06-18 05:41:28 +00:00
if(dup2(fd, STDOUT_FILENO) == -1)
enprintf(Error, "dup2:");
close(fd);
}
if(isatty(STDERR_FILENO))
if(dup2(STDOUT_FILENO, STDERR_FILENO) == -1)
enprintf(Error, "dup2:");
2013-06-14 18:20:47 +00:00
execvp(argv[0], &argv[0]);
enprintf(errno == ENOENT ? Error : Found, "exec %s:", argv[0]);
2011-06-18 05:41:28 +00:00
return Error;
}
2013-06-14 18:20:47 +00:00