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| author | Mattias Andrée <maandree@kth.se> | 2016-07-11 13:40:36 +0200 |
|---|---|---|
| committer | Mattias Andrée <maandree@kth.se> | 2016-07-11 13:40:36 +0200 |
| commit | 5ba88f5b683cf5cc5c5fd19512ed84235fe2d031 (patch) | |
| tree | feda6d481d61d1a5bf00ee568f856bb588f788c4 /src | |
| parent | Implement use of PID file (diff) | |
| download | coopgammad-5ba88f5b683cf5cc5c5fd19512ed84235fe2d031.tar.gz coopgammad-5ba88f5b683cf5cc5c5fd19512ed84235fe2d031.tar.bz2 coopgammad-5ba88f5b683cf5cc5c5fd19512ed84235fe2d031.tar.xz | |
Retry once if pid file is empty
Signed-off-by: Mattias Andrée <maandree@kth.se>
Diffstat (limited to 'src')
| -rw-r--r-- | src/gammad.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/gammad.c b/src/gammad.c index ad1882e..fe1b004 100644 --- a/src/gammad.c +++ b/src/gammad.c @@ -217,7 +217,7 @@ static int is_pidfile_reusable(const char* pidfile, const char* token) /* PORTERS: /proc/$PID/environ is Linux specific */ char temp[sizeof("/proc//environ") + 3 * sizeof(pid_t)]; - int fd = -1, saved_errno; + int fd = -1, saved_errno, tries = 0; char* content = NULL; char* p; char* end; @@ -225,6 +225,7 @@ static int is_pidfile_reusable(const char* pidfile, const char* token) size_t n; /* Get PID */ + retry: fd = open(pidfile, O_RDONLY); if (fd < 0) return -1; @@ -233,6 +234,14 @@ static int is_pidfile_reusable(const char* pidfile, const char* token) goto fail; close(fd), fd = -1; + if (n == 0) + { + if (++tries > 1) + goto bad; + usleep(100000); /* 1 tenth of a second */ + goto retry; + } + if (('0' > content[0]) || (content[0] > '9')) goto bad; if ((content[0] == '0') && ('0' <= content[1]) && (content[1] <= '9')) |