diff options
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/inetd.c | 200 |
1 files changed, 84 insertions, 116 deletions
diff --git a/networking/inetd.c b/networking/inetd.c index 8491fc3..db0ee81 100644 --- a/networking/inetd.c +++ b/networking/inetd.c @@ -131,25 +131,24 @@ #include <stdarg.h> #include <time.h> +#ifndef OPEN_MAX +#define OPEN_MAX 64 +#endif + #define _PATH_INETDCONF "/etc/inetd.conf" #define _PATH_INETDPID "/var/run/inetd.pid" -#define TOOMANY 40 /* don't start more than TOOMANY */ -#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */ -#define RETRYTIME (60*10) /* retry after bind or server fail */ - -#ifndef OPEN_MAX -#define OPEN_MAX 64 -#endif +#define TOOMANY 40 /* don't start more than TOOMANY */ +#define CNT_INTVL 60 /* servers in CNT_INTVL sec. */ +#define RETRYTIME (60*10) /* retry after bind or server fail */ +#define MAXARGV 20 +#define se_ctrladdr se_un.se_un_ctrladdr +#define se_ctrladdr_in se_un.se_un_ctrladdr_in +#define se_ctrladdr_un se_un.se_un_ctrladdr_un /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */ -#define FD_MARGIN (8) -static int rlim_ofile_cur = OPEN_MAX; - -#ifdef RLIMIT_NOFILE -static struct rlimit rlim_ofile; -#endif +#define FD_MARGIN (8) /* Check unsupporting builtin */ #if defined CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO || \ @@ -173,7 +172,6 @@ static struct servtab { const struct biltin *se_bi; /* if built-in, description */ #endif char *se_server; /* server program */ -#define MAXARGV 20 char *se_argv[MAXARGV+1]; /* program arguments */ int se_fd; /* open descriptor */ union { @@ -181,9 +179,6 @@ static struct servtab { struct sockaddr_in se_un_ctrladdr_in; struct sockaddr_un se_un_ctrladdr_un; } se_un; /* bound address */ -#define se_ctrladdr se_un.se_un_ctrladdr -#define se_ctrladdr_in se_un.se_un_ctrladdr_in -#define se_ctrladdr_un se_un.se_un_ctrladdr_un int se_ctrladdr_size; int se_max; /* max # of instances of this service */ int se_count; /* number started since se_time */ @@ -191,21 +186,21 @@ static struct servtab { struct servtab *se_next; } *servtab; -/* Length of socket listen queue. Should be per-service probably. */ -static int global_queuelen = 128; - -static int nsock, maxsock; -static fd_set allsock; -static int timingout; -static sigset_t blockmask, emptymask; - +#ifdef INETD_FEATURE_ENABLED +struct biltin { + const char *bi_service; /* internally provided service name */ + int bi_socktype; /* type of socket supported */ + short bi_fork; /* 1 if should fork before call */ + short bi_wait; /* 1 if should wait for child */ + void (*bi_fn)(int, struct servtab *); /* fn which performs it */ +}; - /* Echo received data */ + /* Echo received data */ #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO static void echo_stream(int, struct servtab *); static void echo_dg(int, struct servtab *); #endif - /* Internet /dev/null */ + /* Internet /dev/null */ #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD static void discard_stream(int, struct servtab *); static void discard_dg(int, struct servtab *); @@ -226,16 +221,6 @@ static void chargen_stream(int, struct servtab *); static void chargen_dg(int, struct servtab *); #endif - -#ifdef INETD_FEATURE_ENABLED -struct biltin { - const char *bi_service; /* internally provided service name */ - int bi_socktype; /* type of socket supported */ - short bi_fork; /* 1 if should fork before call */ - short bi_wait; /* 1 if should wait for child */ - void (*bi_fn)(int, struct servtab *); /* fn which performs it */ -}; - static const struct biltin biltins[] = { #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO /* Echo received data */ @@ -266,7 +251,23 @@ static const struct biltin biltins[] = { }; #endif /* INETD_FEATURE_ENABLED */ +#ifdef RLIMIT_NOFILE +static struct rlimit rlim_ofile; +#endif + +/* Length of socket listen queue. Should be per-service probably. */ +static int global_queuelen = 128; + +static FILE *fconfig; +static sigset_t blockmask; +static sigset_t emptymask; +static fd_set allsock; +static int nsock; +static int maxsock; +static int timingout; +static int rlim_ofile_cur = OPEN_MAX; static const char *CONFIG = _PATH_INETDCONF; +static FILE *fconfig; static void syslog_err_and_discard_dg(int se_socktype, const char *msg, ...) @@ -285,10 +286,7 @@ syslog_err_and_discard_dg(int se_socktype, const char *msg, ...) _exit(1); } -static FILE *fconfig; - -static FILE * -setconfig(void) +static FILE *setconfig(void) { FILE *f = fconfig; @@ -302,8 +300,7 @@ setconfig(void) return f; } -static char * -skip(char **cpp) +static char *skip(char **cpp) { char *cp = *cpp; char *start; @@ -335,8 +332,7 @@ again: return (start); } -static char * -newstr(char *cp) +static char *newstr(char *cp) { cp = strdup(cp ? cp : ""); if (cp) @@ -346,8 +342,7 @@ newstr(char *cp) } -static struct servtab * -getconfigent(void) +static struct servtab *getconfigent(void) { static struct servtab serv; struct servtab *sep = &serv; @@ -441,8 +436,7 @@ more: return (sep); } -static void -freeconfig(struct servtab *cp) +static void freeconfig(struct servtab *cp) { int i; @@ -459,8 +453,7 @@ freeconfig(struct servtab *cp) static char **Argv; static char *LastArg; -static void -setproctitle(char *a, int s) +static void setproctitle(char *a, int s) { size_t size; char *cp; @@ -480,8 +473,7 @@ setproctitle(char *a, int s) } #endif /* INETD_FEATURE_ENABLED */ -static struct servtab * -enter(struct servtab *cp) +static struct servtab *enter(struct servtab *cp) { struct servtab *sep; sigset_t oldmask; @@ -499,8 +491,7 @@ enter(struct servtab *cp) return (sep); } -static int -bump_nofile(void) +static int bump_nofile(void) { #ifdef RLIMIT_NOFILE @@ -539,8 +530,7 @@ bump_nofile(void) } -static void -setup(struct servtab *sep) +static void setup(struct servtab *sep) { int on = 1; @@ -575,8 +565,7 @@ setup(struct servtab *sep) } } -static void -config(int signum) +static void config(int signum) { struct servtab *sep, *cp, **sepp; sigset_t oldmask; @@ -705,8 +694,7 @@ config(int signum) -static void -reapchild(int signum) +static void reapchild(int signum) { int status; int pid; @@ -734,8 +722,7 @@ reapchild(int signum) } } -static void -retry(int signum) +static void retry(int signum) { struct servtab *sep; @@ -753,8 +740,7 @@ retry(int signum) } } -static void -goaway(int signum) +static void goaway(int signum) { struct servtab *sep; @@ -768,11 +754,9 @@ goaway(int signum) -extern int -inetd_main(int argc, char *argv[]) +extern int inetd_main(int argc, char *argv[]) { struct servtab *sep; - struct passwd *pwd; struct group *grp = NULL; struct sigaction sa; int pid; @@ -781,10 +765,7 @@ inetd_main(int argc, char *argv[]) gid_t gid; #ifdef INETD_FEATURE_ENABLED - int dofork; extern char **environ; -#else -# define dofork 1 #endif gid = getgid(); @@ -914,12 +895,11 @@ inetd_main(int argc, char *argv[]) sigprocmask(SIG_BLOCK, &blockmask, NULL); pid = 0; #ifdef INETD_FEATURE_ENABLED - dofork = (sep->se_bi == 0 || sep->se_bi->bi_fork); + if (sep->se_bi == 0 || sep->se_bi->bi_fork) #endif - if (dofork) { + { if (sep->se_count++ == 0) - (void)gettimeofday(&sep->se_time, - (struct timezone *)0); + (void)gettimeofday(&sep->se_time, (struct timezone *)0); else if (sep->se_count >= sep->se_max) { struct timeval now; @@ -947,19 +927,19 @@ inetd_main(int argc, char *argv[]) } } pid = fork(); - } - if (pid < 0) { - syslog(LOG_ERR, "fork: %m"); - if (sep->se_socktype == SOCK_STREAM) - close(ctrl); - sigprocmask(SIG_SETMASK, &emptymask, NULL); - sleep(1); - continue; - } - if (pid && sep->se_wait) { - sep->se_wait = pid; - FD_CLR(sep->se_fd, &allsock); - nsock--; + if (pid < 0) { + syslog(LOG_ERR, "fork: %m"); + if (sep->se_socktype == SOCK_STREAM) + close(ctrl); + sigprocmask(SIG_SETMASK, &emptymask, NULL); + sleep(1); + continue; + } + if (pid && sep->se_wait) { + sep->se_wait = pid; + FD_CLR(sep->se_fd, &allsock); + nsock--; + } } sigprocmask(SIG_SETMASK, &emptymask, NULL); if (pid == 0) { @@ -968,8 +948,9 @@ inetd_main(int argc, char *argv[]) (*sep->se_bi->bi_fn)(ctrl, sep); else #endif - { - if ((pwd = getpwnam(sep->se_user)) == NULL) { + { + struct passwd *pwd = getpwnam(sep->se_user); + if (pwd == NULL) { syslog_err_and_discard_dg( sep->se_socktype, "getpwnam: %s: No such user", @@ -1041,8 +1022,7 @@ inetd_main(int argc, char *argv[]) #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_ECHO /* Echo service -- echo data back */ -static void -echo_stream(int s, struct servtab *sep) +static void echo_stream(int s, struct servtab *sep) { char buffer[BUFSIZE]; int i; @@ -1055,8 +1035,7 @@ echo_stream(int s, struct servtab *sep) } /* Echo service -- echo data back */ -static void -echo_dg(int s, struct servtab *sep) +static void echo_dg(int s, struct servtab *sep) { char buffer[BUFSIZE]; int i; @@ -1075,8 +1054,7 @@ echo_dg(int s, struct servtab *sep) #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DISCARD /* Discard service -- ignore data */ -static void -discard_stream(int s, struct servtab *sep) +static void discard_stream(int s, struct servtab *sep) { char buffer[BUFSIZE]; @@ -1088,8 +1066,7 @@ discard_stream(int s, struct servtab *sep) } /* Discard service -- ignore data */ -static void -discard_dg(int s, struct servtab *sep) +static void discard_dg(int s, struct servtab *sep) { char buffer[BUFSIZE]; (void)sep; @@ -1104,8 +1081,7 @@ discard_dg(int s, struct servtab *sep) static char ring[128]; static char *endring; -static void -initring(void) +static void initring(void) { int i; @@ -1117,8 +1093,7 @@ initring(void) } /* Character generator */ -static void -chargen_stream(int s, struct servtab *sep) +static void chargen_stream(int s, struct servtab *sep) { char *rs; int len; @@ -1149,8 +1124,7 @@ chargen_stream(int s, struct servtab *sep) } /* Character generator */ -static void -chargen_dg(int s, struct servtab *sep) +static void chargen_dg(int s, struct servtab *sep) { struct sockaddr sa; static char *rs; @@ -1192,8 +1166,7 @@ chargen_dg(int s, struct servtab *sep) * some seventy years Bell Labs was asleep. */ -static long -machtime(void) +static long machtime(void) { struct timeval tv; @@ -1204,8 +1177,7 @@ machtime(void) return (htonl((long)tv.tv_sec + 2208988800UL)); } -static void -machtime_stream(int s, struct servtab *sep) +static void machtime_stream(int s, struct servtab *sep) { long result; (void)sep; @@ -1214,8 +1186,7 @@ machtime_stream(int s, struct servtab *sep) write(s, (char *) &result, sizeof(result)); } -static void -machtime_dg(int s, struct servtab *sep) +static void machtime_dg(int s, struct servtab *sep) { long result; struct sockaddr sa; @@ -1233,16 +1204,14 @@ machtime_dg(int s, struct servtab *sep) #ifdef CONFIG_FEATURE_INETD_SUPPORT_BILTIN_DAYTIME /* Return human-readable time of day */ -static int -human_readable_time_sprintf(char *buffer) +static int human_readable_time_sprintf(char *buffer) { time_t clocc = time(NULL); return sprintf(buffer, "%.24s\r\n", ctime(&clocc)); } -static void -daytime_stream(int s, struct servtab *sep) +static void daytime_stream(int s, struct servtab *sep) { char buffer[256]; size_t st = human_readable_time_sprintf(buffer); @@ -1253,8 +1222,7 @@ daytime_stream(int s, struct servtab *sep) } /* Return human-readable time of day */ -static void -daytime_dg(int s, struct servtab *sep) +static void daytime_dg(int s, struct servtab *sep) { char buffer[256]; struct sockaddr sa; |