diff options
Diffstat (limited to '')
| -rw-r--r-- | src/posix-io.c | 68 |
1 files changed, 37 insertions, 31 deletions
diff --git a/src/posix-io.c b/src/posix-io.c index 5296f5fc..cabb3e50 100644 --- a/src/posix-io.c +++ b/src/posix-io.c @@ -287,37 +287,43 @@ get_max_fds (void) int rc; /* Under Linux we can figure out the highest used file descriptor by - * reading /proc/self/fd. This is in the common cases much fast than - * for example doing 4096 close calls where almost all of them will - * fail. */ -#ifdef __linux__ - { - DIR *dir = NULL; - struct dirent *dir_entry; - const char *s; - int x; - - dir = opendir ("/proc/self/fd"); - if (dir) - { - while ((dir_entry = readdir (dir))) - { - s = dir_entry->d_name; - if ( *s < '0' || *s > '9') - continue; - x = atoi (s); - if (x > fds) - fds = x; - } - closedir (dir); - } - if (fds != -1) - { - fds++; - source = "/proc"; - } - } -#endif /* __linux__ */ + * reading /proc/self/fd. This is in the common cases much faster + * than for example doing 4096 close calls where almost all of them + * will fail. + * + * Unfortunately we can't call opendir between fork and exec in a + * multi-threaded process because opendir uses malloc and thus a + * mutex which may deadlock with a malloc in another thread. Thus + * the code is not used until we can have a opendir variant which + * does not use malloc. */ +/* #ifdef __linux__ */ +/* { */ +/* DIR *dir = NULL; */ +/* struct dirent *dir_entry; */ +/* const char *s; */ +/* int x; */ + +/* dir = opendir ("/proc/self/fd"); */ +/* if (dir) */ +/* { */ +/* while ((dir_entry = readdir (dir))) */ +/* { */ +/* s = dir_entry->d_name; */ +/* if ( *s < '0' || *s > '9') */ +/* continue; */ +/* x = atoi (s); */ +/* if (x > fds) */ +/* fds = x; */ +/* } */ +/* closedir (dir); */ +/* } */ +/* if (fds != -1) */ +/* { */ +/* fds++; */ +/* source = "/proc"; */ +/* } */ +/* } */ +/* #endif /\* __linux__ *\/ */ #ifdef RLIMIT_NOFILE if (fds == -1) |