diff options
| -rw-r--r-- | init/Config.in | 11 | ||||
| -rw-r--r-- | init/init.c | 7 |
2 files changed, 18 insertions, 0 deletions
diff --git a/init/Config.in b/init/Config.in index 521f8fe..a3584aa 100644 --- a/init/Config.in +++ b/init/Config.in @@ -43,6 +43,17 @@ config CONFIG_FEATURE_INIT_SWAPON If the system has less than one megabyte of total memory, init will run '/sbin/swapon -a' to add swap memory. +config CONFIG_FEATURE_INIT_SCTTY + bool " Support running commands with a controlling-tty?" + default n + depends on CONFIG_INIT + help + If this option is enabled a command starting with hyphen (-) + is run in its own session (setsid(2)) and possibly with a + controlling tty (TIOCSCTTY). This is not the traditional init + behavour, but is often what you want in an embedded system where + the console is only accessed during development or for maintenance. + config CONFIG_FEATURE_EXTRA_QUIET bool " Should init be _extra_ quiet on boot?" default y diff --git a/init/init.c b/init/init.c index 8687b10..0f49a45 100644 --- a/init/init.c +++ b/init/init.c @@ -577,6 +577,13 @@ static pid_t run(const struct init_action *a) cmd[0][0] = '-'; strcpy(cmd[0] + 1, s); } +#ifdef CONFIG_FEATURE_INIT_SCTTY + /* Establish this process as session leader and + * (attempt) to make the tty (if any) a controlling tty. + */ + (void) setsid(); + (void) ioctl(0, TIOCSCTTY, 0/*don't steal it*/); +#endif } #if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__) |