132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/*
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* cinit
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* (c) 2005 Nico Schottelius (nico-linux at schottelius.org)
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* header of cinit
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*/
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/* includes */
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#include <sys/types.h> /* pid_t */
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#include "config.h" /* paths, socket options, etc. */
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/* paths */
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#define C_ONARG C_ON C_PARAMS
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#define C_OFFARG C_OFF C_PARAMS
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#define C_ONENV C_ON C_ENV
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#define C_OFFENV C_OFF C_ENV
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#define SLASH "/"
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#define CINIT_INIT CINIT_DIR SLASH C_INIT
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#define CINIT_TMNT CINIT_DIR SLASH C_TMP
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#define CINIT_SOCK CINIT_TMNT SLASH C_SOCK
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/* commands (maximum: 2^8 = 256)*/
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#define CMD_START_SVC 1
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#define CMD_CHG_STATUS 2
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#define CMD_STOP_SVC 3
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#define CMD_RESCUE 4
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#define CMD_HALT 5
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#define CMD_REBOOT 6
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#define CMD_POWEROFF 7
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/* status of a service - DO NOT USE 0! */
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#define ST_TMP 1 /* currently working on it */
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#define ST_ONCE 2 /* executed once */
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#define ST_RESPAWN 3 /* running and respawning */
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#define ST_FAIL 4 /* failed to start service */
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#define ST_TMPNOW 5 /* now you are on it - only for clients */
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#define ST_OFF 6 /* Switching service off */
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/* actions for i/o handlers (see comm/do_*) */
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#define ACT_SERV 0
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#define ACT_CLIENT 1
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/* Messages to the outside */
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#define MSG_ERR_OPEN "open"
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#define MSG_ERR_READ "read"
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#define MSG_ERR_IO "i/o"
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#define MSG_ERR_PIPE "pipe"
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#define MSG_ERR_FORK "fork"
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#define MSG_BIND "bind"
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#define MSG_LISTEN "listen"
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#define MSG_SOCKET "socket"
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#define MSG_CONNECT "connect"
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#define MSG_FCNTL "fcntl"
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#define MSG_ERR_EXECVE "execve"
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#define MSG_ERR_ALLOC "memory allocation"
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#define MSG_ERR_UMOUNT "umount"
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#define MSG_ERR_MOUNT "mount"
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#define MSG_TERMKILL "sigterm"
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#define MSG_KILLBILL "sigkill"
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#define MSG_INIT_MISS "initial service missing"
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#define MSG_NOT_DIR "not a directory"
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#define MSG_CHDIR "chdir"
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#define MSG_READLINK "readlink"
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#define MSG_ERR_ADD_SVC "Adding service failed"
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#define MSG_CMD_UNKNOWN "Unknown command"
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#define MSG_ERR_DEPS "Too many dependencies"
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#define MSG_ERR_ACCEPT "accept"
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#define MSG_ERR_WAITPID "waitpid"
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struct listitem {
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char *abs_path; /* name of service */
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int status; /* current status */
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pid_t pid; /* pid of service / respawn watcher */
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struct listitem *before; /* previous item */
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struct listitem *after; /* next item */
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};
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/* variables */
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extern struct listitem *list; /* the process linked chain */
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extern int sock; /* current writing/reading socket */
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extern int logfd; /* log file deskriptor, currently unused */
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extern pid_t cpid; /* used by main() and reused be respaw_svc() */
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/* functions (used by server and client) */
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int run_svc(char *rpath);
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void mini_printf(char *str, int fd);
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void set_signals(int action);
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#define LOG(s) mini_printf(s,logfd)
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int do_svc_name(int sock2, char *svc, int action);
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int do_change_status(char *svc, char *status, pid_t *pid, int sock2, int action);
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char do_result(int sock2, char *value);
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/* server functions */
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int list_insert(char *path, int status);
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struct listitem *list_search(char *path);
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int list_delete(char *path);
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int run_init_svc(char *cinit_svc);
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void sigio(int signal);
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void sig_reboot(int signal);
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void panic(void);
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void sig_child(int signal);
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/* client / message functions */
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int msg_svc_on_off(char *svc, int action);
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int msg_change_status(char *svc, char status, pid_t pid);
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int begin_msg(char cmd);
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/* client functions */
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int run_run_svcs(char *abspath);
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pid_t exec_svc(char *abspath, int on);
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pid_t respawn_svc(char *abspath);
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int connect_sock(int socke);
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char **read_file(char *file);
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void sig_terminate(int signal);
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/* listing functions (server only) */
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int list_insert(char *path, int status);
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struct listitem *list_search(char *path);
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int list_delete(char *path);
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int list_modify(char *path, int new_status, pid_t new_pid);
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/* util */
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int msg_reboot(char cmd);
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/* DEBUG */
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#ifdef DEBUG
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# define D_PRINTF(x) ( printf("[%s:%d]: %s\n",__FILE__,__LINE__,x) )
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#else
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# define D_PRINTF(x) if(0)
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#endif
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