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| author | Denis Vlasenko | 2008-11-05 11:36:22 +0000 |
|---|---|---|
| committer | Denis Vlasenko | 2008-11-05 11:36:22 +0000 |
| commit | 4cb576ea98aa8974243e168e2470e3d5d7b7d1f5 (patch) | |
| tree | 53aff742d140ed57185c0e0ee374248cc70864e2 /networking | |
| parent | a643816fe360c7551ac19c04e10111be620e9dad (diff) | |
| download | busybox-4cb576ea98aa8974243e168e2470e3d5d7b7d1f5.zip busybox-4cb576ea98aa8974243e168e2470e3d5d7b7d1f5.tar.gz | |
inetd: fix a case when we have zero services
Diffstat (limited to 'networking')
| -rw-r--r-- | networking/inetd.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/networking/inetd.c b/networking/inetd.c index f80b510..bf018d7 100644 --- a/networking/inetd.c +++ b/networking/inetd.c @@ -223,7 +223,7 @@ typedef struct servtab_t { smallint se_checked; /* looked at during merge */ unsigned se_max; /* allowed instances per minute */ unsigned se_count; /* number started since se_time */ - unsigned se_time; /* whem we started counting */ + unsigned se_time; /* when we started counting */ char *se_user; /* user name to run as */ char *se_group; /* group name to run as, can be NULL */ #ifdef INETD_BUILTINS_ENABLED @@ -295,8 +295,10 @@ struct globals { struct rlimit rlim_ofile; servtab_t *serv_list; int global_queuelen; + int maxsock; /* max fd# in allsock, -1: unknown */ + /* whenever maxsock grows, prev_maxsock is set to new maxsock, + * but if maxsock is set to -1, prev_maxsock is not changed */ int prev_maxsock; - int maxsock; unsigned max_concurrency; smallint alarm_armed; uid_t real_uid; /* user ID who ran us */ @@ -321,8 +323,8 @@ struct BUG_G_too_big { #define rlim_ofile (G.rlim_ofile ) #define serv_list (G.serv_list ) #define global_queuelen (G.global_queuelen) -#define prev_maxsock (G.prev_maxsock ) #define maxsock (G.maxsock ) +#define prev_maxsock (G.prev_maxsock ) #define max_concurrency (G.max_concurrency) #define alarm_armed (G.alarm_armed ) #define real_uid (G.real_uid ) @@ -459,7 +461,7 @@ static void add_fd_to_set(int fd) FD_SET(fd, &allsock); if (maxsock >= 0 && fd > maxsock) { prev_maxsock = maxsock = fd; - if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN) + if ((rlim_t)fd > rlim_ofile_cur - FD_MARGIN) bump_nofile(); } } @@ -468,6 +470,10 @@ static void add_fd_to_set(int fd) static void recalculate_maxsock(void) { int fd = 0; + + /* We may have no services, in this case maxsock should still be >= 0 + * (code elsewhere is not happy with maxsock == -1) */ + maxsock = 0; while (fd <= prev_maxsock) { if (FD_ISSET(fd, &allsock)) maxsock = fd; @@ -1161,7 +1167,8 @@ int inetd_main(int argc UNUSED_PARAM, char **argv) readable = allsock; /* struct copy */ /* if there are no fds to wait on, we will block - * until signal wakes us up */ + * until signal wakes us up (maxsock == 0, but readable + * never contains fds 0 and 1...) */ ready_fd_cnt = select(maxsock + 1, &readable, NULL, NULL, NULL); if (ready_fd_cnt < 0) { if (errno != EINTR) { @@ -1418,7 +1425,7 @@ static void echo_dg(int s, servtab_t *sep) #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD -/* Discard service -- ignore data. MMU arches only. */ +/* Discard service -- ignore data. */ /* ARGSUSED */ static void discard_stream(int s, servtab_t *sep UNUSED_PARAM) { |