diff options
Diffstat (limited to 'toys/other/oneit.c')
| -rw-r--r-- | toys/other/oneit.c | 45 |
1 files changed, 21 insertions, 24 deletions
diff --git a/toys/other/oneit.c b/toys/other/oneit.c index 8bb482da..5bf4e941 100644 --- a/toys/other/oneit.c +++ b/toys/other/oneit.c @@ -1,27 +1,25 @@ -/* vi: set sw=4 ts=4: - * - * oneit.c - tiny init replacement to launch a single child process. +/* oneit.c - tiny init replacement to launch a single child process. * * Copyright 2005, 2007 by Rob Landley <rob@landley.net>. USE_ONEIT(NEWTOY(oneit, "^<1c:p", TOYFLAG_SBIN)) config ONEIT - bool "oneit" - default y - help - usage: oneit [-p] [-c /dev/tty0] command [...] + bool "oneit" + default y + help + usage: oneit [-p] [-c /dev/tty0] command [...] - A simple init program that runs a single supplied command line with a - controlling tty (so CTRL-C can kill it). + A simple init program that runs a single supplied command line with a + controlling tty (so CTRL-C can kill it). - -p Power off instead of rebooting when command exits. - -c Which console device to use. + -p Power off instead of rebooting when command exits. + -c Which console device to use. - The oneit command runs the supplied command line as a child process - (because PID 1 has signals blocked), attached to /dev/tty0, in its - own session. Then oneit reaps zombies until the child exits, at - which point it reboots (or with -p, powers off) the system. + The oneit command runs the supplied command line as a child process + (because PID 1 has signals blocked), attached to /dev/tty0, in its + own session. Then oneit reaps zombies until the child exits, at + which point it reboots (or with -p, powers off) the system. */ #define FOR_oneit @@ -29,7 +27,7 @@ config ONEIT #include <sys/reboot.h> GLOBALS( - char *console; + char *console; ) // The minimum amount of work necessary to get ctrl-c and such to work is: @@ -53,22 +51,21 @@ void oneit_main(void) if (pid) { // pid 1 just reaps zombies until it gets its child, then halts the system. - while (pid!=wait(&i)); + while (pid != wait(&i)); sync(); - // PID 1 can't call reboot() because it kills the task that calls it, - // which causes the kernel to panic before the actual reboot happens. - if (!vfork()) - reboot((toys.optflags & FLAG_p) ? RB_POWER_OFF : RB_AUTOBOOT); - sleep(5); - _exit(1); + // PID 1 can't call reboot() because it kills the task that calls it, + // which causes the kernel to panic before the actual reboot happens. + if (!vfork()) reboot((toys.optflags & FLAG_p) ? RB_POWER_OFF : RB_AUTOBOOT); + sleep(5); + _exit(1); } // Redirect stdio to /dev/tty0, with new session ID, so ctrl-c works. setsid(); for (i=0; i<3; i++) { close(i); - xopen(TT.console ? TT.console : "/dev/tty0",O_RDWR); + xopen(TT.console ? TT.console : "/dev/tty0", O_RDWR); } // Can't xexec() here, because we vforked so we don't want to error_exit(). |