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Diffstat (limited to 'networking/inetd.c')
-rw-r--r--networking/inetd.c200
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;