Diff of /trunk/mkinitrd-magellan/busybox/coreutils/nohup.c

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	revision 532 by niro, Sat Sep 1 22:45:15 2007 UTC	revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
#	Line 5	Line 5
5	* http://www.opengroup.org/onlinepubs/007904975/utilities/nohup.html	* http://www.opengroup.org/onlinepubs/007904975/utilities/nohup.html
6	*	*
7	* Copyright 2006 Rob Landley <rob@landley.net>	* Copyright 2006 Rob Landley <rob@landley.net>
8	* Copyright 2006 Bernhard Fischer	* Copyright 2006 Bernhard Reutner-Fischer
9	*	*
10	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11	*/	*/
12
13	#include "busybox.h"	#include "libbb.h"
14
15		/* Compat info: nohup (GNU coreutils 6.8) does this:
16		# nohup true
17		nohup: ignoring input and appending output to `nohup.out'
18		# nohup true 1>/dev/null
19		nohup: ignoring input and redirecting stderr to stdout
20		# nohup true 2>zz
21		# cat zz
22		nohup: ignoring input and appending output to `nohup.out'
23		# nohup true 2>zz 1>/dev/null
24		# cat zz
25		nohup: ignoring input
26		# nohup true </dev/null 1>/dev/null
27		nohup: redirecting stderr to stdout
28		# nohup true </dev/null 2>zz 1>/dev/null
29		# cat zz
30		(nothing)
31		#
32		*/
33
34		int nohup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
35	int nohup_main(int argc, char **argv)	int nohup_main(int argc, char **argv)
36	{	{
37	int temp, nullfd;	const char *nohupout;
38	char *nohupout, *home = NULL;	char *home;
39
40	xfunc_error_retval = 127;	xfunc_error_retval = 127;
41
42	if (argc<2) bb_show_usage();	if (argc < 2) bb_show_usage();
43
	nullfd = xopen(bb_dev_null, O_WRONLY|O_APPEND);
44	/* If stdin is a tty, detach from it. */	/* If stdin is a tty, detach from it. */
45	if (isatty(STDIN_FILENO)) dup2(nullfd, STDIN_FILENO);	if (isatty(STDIN_FILENO)) {
46		/* bb_error_msg("ignoring input"); */
47		close(STDIN_FILENO);
48		xopen(bb_dev_null, O_RDONLY); /* will be fd 0 (STDIN_FILENO) */
49		}
50
51	nohupout = "nohup.out";	nohupout = "nohup.out";
52	/* Redirect stdout to nohup.out, either in "." or in "$HOME". */	/* Redirect stdout to nohup.out, either in "." or in "$HOME". */
#	Line 34  int nohup_main(int argc, char **argv)	Line 57  int nohup_main(int argc, char **argv)
57	if (home) {	if (home) {
58	nohupout = concat_path_file(home, nohupout);	nohupout = concat_path_file(home, nohupout);
59	xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);	xopen3(nohupout, O_CREAT|O_WRONLY|O_APPEND, S_IRUSR|S_IWUSR);
60		} else {
61		xopen(bb_dev_null, O_RDONLY); /* will be fd 1 */
62	}	}
63	}	}
64	} else dup2(nullfd, STDOUT_FILENO);	bb_error_msg("appending output to %s", nohupout);
65		}
66
67		/* If we have a tty on stderr, redirect to stdout. */
68		if (isatty(STDERR_FILENO)) {
69		/* if (stdout_wasnt_a_tty)
70		bb_error_msg("redirecting stderr to stdout"); */
71		dup2(STDOUT_FILENO, STDERR_FILENO);
72		}
73
74		signal(SIGHUP, SIG_IGN);
75
76	/* If we have a tty on strderr, announce filename and redirect to stdout.	BB_EXECVP(argv[1], argv+1);
77	* Else redirect to /dev/null.	bb_simple_perror_msg_and_die(argv[1]);
	*/
	temp = isatty(STDERR_FILENO);
	if (temp) bb_error_msg("appending to %s", nohupout);
	dup2(temp ? STDOUT_FILENO : nullfd, STDERR_FILENO);
	close(nullfd);
	signal (SIGHUP, SIG_IGN);
	execvp(argv[1],argv+1);
	if (00 && ENABLE_FEATURE_CLEAN_UP && home) free(nohupout);
	bb_perror_msg_and_die("%s", argv[1]);
78	}	}

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