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	nohup.c - sbase - suckless unix tools
	git clone git://git.suckless.org/sbase
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	---
	nohup.c (901B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <sys/stat.h>
	3
	4 #include <errno.h>
	5 #include <fcntl.h>
	6 #include <signal.h>
	7 #include <unistd.h>
	8
	9 #include "util.h"
	10
	11 static void
	12 usage(void)
	13 {
	14 eprintf("usage: %s cmd [arg ...]\n", argv0);
	15 }
	16
	17 int
	18 main(int argc, char *argv[])
	19 {
	20 int fd, savederrno;
	21
	22 ARGBEGIN {
	23 default:
	24 usage();
	25 } ARGEND
	26
	27 if (!argc)
	28 usage();
	29
	30 if (signal(SIGHUP, SIG_IGN) == SIG_ERR)
	31 enprintf(127, "signal HUP:");
	32
	33 if (isatty(STDOUT_FILENO)) {
	34 if ((fd = open("nohup.out", O_WRONLY \| O_APPEND \| O_CREA…
	35 enprintf(127, "open nohup.out:");
	36 if (dup2(fd, STDOUT_FILENO) < 0)
	37 enprintf(127, "dup2:");
	38 close(fd);
	39 }
	40 if (isatty(STDERR_FILENO) && dup2(STDOUT_FILENO, STDERR_FILENO) …
	41 enprintf(127, "dup2:");
	42
	43 execvp(argv[0], argv);
	44 savederrno = errno;
	45 weprintf("execvp %s:", argv[0]);
	46
	47 _exit(126 + (savederrno == ENOENT));
	48 }