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openvt,getty,vfork_daemon_rexec,mount: tighten up fd cleanup code

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(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();
This commit is contained in:
Denis Vlasenko
2007-01-19 21:19:35 +00:00
parent f8c11aa65d
commit 9af7c9d6b6
15 changed files with 57 additions and 54 deletions
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15
console-tools/openvt.c
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@@ -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);