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setsid: add option "-c" to set the controlling terminal 

[kzak@redhat.com: - use STDIN_FILENO rather than 0]

Signed-off-by: Karel Zak <kzak@redhat.com>
This commit is contained in:
Harald Hoyer 2012-03-14 10:07:18 +01:00 committed by Karel Zak
parent d0202f1c5a
commit 8a2f04ddca
2 changed files with 20 additions and 2 deletions
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4
sys-utils/setsid.1
View File

@ -11,6 +11,10 @@ setsid \- run a program in a new session
.SH DESCRIPTION
.B setsid
runs a program in a new session.
.SH OPTIONS
.TP
\fB\-c\fP, \fB\-\-ctty\fP
Set the controlling terminal to the current one.
.SH "SEE ALSO"
.BR setsid (2)
.SH AUTHOR

18
sys-utils/setsid.c
View File

@ -15,6 +15,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <termio.h>
#include "c.h"
#include "nls.h"
@ -25,6 +26,9 @@ static void __attribute__ ((__noreturn__)) usage(FILE * out)
fprintf(out, _(" %s [options] <program> [arguments ...]\n"),
program_invocation_short_name);
fprintf(out, USAGE_OPTIONS);
fprintf(out, _(
" -c, --ctty \tset the controlling terminal to the current one\n"
));
fprintf(out, USAGE_HELP);
fprintf(out, USAGE_VERSION);
fprintf(out, USAGE_MAN_TAIL("setsid(1)"));
@ -34,7 +38,10 @@ static void __attribute__ ((__noreturn__)) usage(FILE * out)
int main(int argc, char **argv)
{
int ch;
int ctty = 0;
static const struct option longopts[] = {
{"ctty", no_argument, NULL, 'c'},
{"version", no_argument, NULL, 'V'},
{"help", no_argument, NULL, 'h'},
{NULL, 0, NULL, 0}
@ -44,11 +51,14 @@ int main(int argc, char **argv)
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
while ((ch = getopt_long(argc, argv, "+Vh", longopts, NULL)) != -1)
while ((ch = getopt_long(argc, argv, "+Vhc", longopts, NULL)) != -1)
switch (ch) {
case 'V':
printf(UTIL_LINUX_VERSION);
return EXIT_SUCCESS;
case 'c':
ctty=1;
break;
case 'h':
usage(stdout);
default:
@ -74,6 +84,10 @@ int main(int argc, char **argv)
/* cannot happen */
err(EXIT_FAILURE, _("setsid failed"));
execvp(argv[1], argv + 1);
if (ctty) {
if (ioctl(STDIN_FILENO, TIOCSCTTY, 1))
warn(_("failed to set the controlling terminal"));
}
execvp(argv[optind], argv + optind + 1);
err(EXIT_FAILURE, _("execvp failed"));
}