diff options
Diffstat (limited to 'include/libbb.h')
| -rw-r--r-- | include/libbb.h | 86 |
1 files changed, 58 insertions, 28 deletions
diff --git a/include/libbb.h b/include/libbb.h index aba9316d1..ff7d3bf1a 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -263,17 +263,9 @@ char *xrealloc_getcwd_or_warn(char *cwd); char *xmalloc_readlink_or_warn(const char *path); char *xmalloc_realpath(const char *path); extern void xstat(const char *filename, struct stat *buf); -extern pid_t spawn(char **argv); -extern pid_t xspawn(char **argv); extern int wait4pid(int pid); extern void xsetgid(gid_t gid); extern void xsetuid(uid_t uid); -extern void xdaemon(int nochdir, int noclose); -/* More clever/thorough xdaemon */ -extern void bb_sanitize_stdio_maybe_daemonize(int daemonize); -extern void bb_sanitize_stdio(void); -/* NB: be careful: dont open syslog/network sockets before bb_daemonize */ -extern void bb_daemonize(void); extern void xchdir(const char *path); extern void xsetenv(const char *key, const char *value); extern int xopen(const char *pathname, int flags); @@ -460,6 +452,62 @@ void clear_username_cache(void); enum { USERNAME_MAX_SIZE = 16 - sizeof(int) }; +int execable_file(const char *name); +char *find_execable(const char *filename); +int exists_execable(const char *filename); + +#if ENABLE_FEATURE_EXEC_PREFER_APPLETS +int bb_execvp(const char *file, char *const argv[]); +#define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd) +#define BB_EXECLP(prog,cmd,...) \ + execlp((find_applet_by_name(prog)) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \ + cmd, __VA_ARGS__) +#else +#define BB_EXECVP(prog,cmd) execvp(prog,cmd) +#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__) +#endif + +/* NOMMU friendy fork+exec */ +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 + * from the start. (It will detect it and not reexec again second time). + * You have to audit carefully that you don't do something twice as a result + * (opening files/sockets, parsing config files etc...)! + * + * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty + * (will do setsid()). + * + * 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. + */ +enum { + DAEMON_CHDIR_ROOT = 1, + DAEMON_DEVNULL_STDIO = /* 2 */ 0, /* no users so far */ + DAEMON_CLOSE_EXTRA_FDS = 4, + 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) +#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() +#endif +void bb_daemonize_or_rexec(int flags, char **argv); +void bb_sanitize_stdio(void); + + enum { BB_GETOPT_ERROR = 0x80000000 }; extern const char *opt_complementary; #if ENABLE_GETOPT_LONG @@ -569,20 +617,6 @@ char *concat_path_file(const char *path, const char *filename); char *concat_subpath_file(const char *path, const char *filename); char *last_char_is(const char *s, int c); -int execable_file(const char *name); -char *find_execable(const char *filename); -int exists_execable(const char *filename); - -#if ENABLE_FEATURE_EXEC_PREFER_APPLETS -int bb_execvp(const char *file, char *const argv[]); -#define BB_EXECVP(prog,cmd) bb_execvp(prog,cmd) -#define BB_EXECLP(prog,cmd,...) \ - execlp((find_applet_by_name(prog)) ? CONFIG_BUSYBOX_EXEC_PATH : prog, \ - cmd, __VA_ARGS__) -#else -#define BB_EXECVP(prog,cmd) execvp(prog,cmd) -#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__) -#endif USE_DESKTOP(long long) int uncompress(int fd_in, int fd_out); int inflate(int in, int out); @@ -617,12 +651,8 @@ extern int index_in_str_array(const char * const string_array[], const char *key extern int index_in_substr_array(const char * const string_array[], const char *key); extern void print_login_issue(const char *issue_file, const char *tty); extern void print_login_prompt(void); -#ifdef BB_NOMMU -extern pid_t BUG_fork_is_unavailable_on_nommu(void); -#define fork() BUG_fork_is_unavailable_on_nommu() -extern void vfork_daemon_rexec(int nochdir, int noclose, char **argv); -extern smallint re_execed; -#endif + + extern int get_terminal_width_height(const int fd, int *width, int *height); char *is_in_ino_dev_hashtable(const struct stat *statbuf); |