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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-01-19 21:19:35 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-01-19 21:19:35 +0000
commit9af7c9d6b62ceb07a9ba24cee0cf4a08c689235e (patch)
tree69a650a8cd686f21087fc572a995420b6ac632cc /console-tools/openvt.c
parentf8c11aa65df2af4ab20c0effc42997bbd7357cc3 (diff)
downloadbusybox-9af7c9d6b62ceb07a9ba24cee0cf4a08c689235e.tar.gz
busybox-9af7c9d6b62ceb07a9ba24cee0cf4a08c689235e.tar.bz2
openvt,getty,vfork_daemon_rexec,mount: tighten up fd cleanup code
(will close all fd's > 2 on daemonization now) getty: fix "getty -" support, and also do not try to chown/chmod "-" telnetd: fix "lost ctty" bug Yet another attempt on saner function names: bb_sanitize_server_stdio(0/1) -> bb_sanitize_stdio() + bb_daemonize();
Diffstat (limited to 'console-tools/openvt.c')
-rw-r--r--console-tools/openvt.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/console-tools/openvt.c b/console-tools/openvt.c
index f1cf5645b..c7b3e4fa4 100644
--- a/console-tools/openvt.c
+++ b/console-tools/openvt.c
@@ -17,7 +17,6 @@ int openvt_main(int argc, char **argv)
int fd;
char vtname[sizeof(VC_FORMAT) + 2];
-
if (argc < 3) {
bb_show_usage();
}
@@ -25,18 +24,16 @@ int openvt_main(int argc, char **argv)
sprintf(vtname, VC_FORMAT, (int)xatoul_range(argv[1], 1, 63));
if (fork() == 0) {
- /* leave current vt */
- if (setsid() < 0) {
- bb_perror_msg_and_die("setsid");
- }
- close(0); /* so that new vt becomes stdin */
-
+ /* child */
+ /* leave current vt (controlling tty) */
+ setsid();
/* and grab new one */
fd = xopen(vtname, O_RDWR);
-
- /* Reassign stdout and sterr */
+ /* Reassign stdin, stdout and sterr */
+ dup2(fd, STDIN_FILENO);
dup2(fd, STDOUT_FILENO);
dup2(fd, STDERR_FILENO);
+ while (fd > 2) close(fd--);
execvp(argv[2], &argv[2]);
_exit(1);