diff options
Diffstat (limited to 'include/libbb.h')
| -rw-r--r-- | include/libbb.h | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/include/libbb.h b/include/libbb.h index ff7d3bf..32e099b 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -471,7 +471,9 @@ int bb_execvp(const char *file, char *const argv[]); pid_t spawn(char **argv); pid_t xspawn(char **argv); /* Helpers for daemonization. + * * bb_daemonize(flags) = daemonize, does not compile on NOMMU + * * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv), * rexec's itself on NOMMU with argv passed as command line. * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed @@ -482,7 +484,12 @@ pid_t xspawn(char **argv); * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty * (will do setsid()). * + * forkexit_or_rexec(argv) = bare-bones "fork + parent exits" on MMU, + * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid(). + * Currently used for openvt. On MMU ignores argv. + * * Helper for network daemons in foreground mode: + * * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them * to /dev/null if they are not. */ @@ -493,16 +500,16 @@ enum { DAEMON_ONLY_SANITIZE = 8, /* internal use */ }; #ifndef BB_NOMMU -#define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags) -#define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus) + void forkexit_or_rexec(void); +# define forkexit_or_rexec(argv) forkexit_or_rexec() +# define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags) +# define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus) #else -extern smallint re_execed; -pid_t BUG_fork_is_unavailable_on_nommu(void); -pid_t BUG_daemon_is_unavailable_on_nommu(void); -pid_t BUG_bb_daemonize_is_unavailable_on_nommu(void); -#define fork() BUG_fork_is_unavailable_on_nommu() -#define daemon(a,b) BUG_daemon_is_unavailable_on_nommu() -#define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu() + void forkexit_or_rexec(char **argv); + extern smallint re_execed; +# define fork() BUG_fork_is_unavailable_on_nommu() +# define daemon(a,b) BUG_daemon_is_unavailable_on_nommu() +# define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu() #endif void bb_daemonize_or_rexec(int flags, char **argv); void bb_sanitize_stdio(void); |