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sd-event: check the value of received signal

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Appease coverity report #1237775.

Also rename ss to n, to make it visually different from ss.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2014-10-03 18:49:45 -04:00
parent 610158048a
commit 7057bd9931
1 changed files with 6 additions and 4 deletions
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10
src/libsystemd/sd-event/sd-event.c
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@ -1973,20 +1973,22 @@ static int process_signal(sd_event *e, uint32_t events) {
for (;;) { for (;;) {
struct signalfd_siginfo si; struct signalfd_siginfo si;
ssize_t ss; ssize_t n;
sd_event_source *s = NULL; sd_event_source *s = NULL;
ss = read(e->signal_fd, &si, sizeof(si)); n = read(e->signal_fd, &si, sizeof(si));
if (ss < 0) { if (n < 0) {
if (errno == EAGAIN || errno == EINTR) if (errno == EAGAIN || errno == EINTR)
return read_one; return read_one;
return -errno; return -errno;
} }
if (_unlikely_(ss != sizeof(si))) if (_unlikely_(n != sizeof(si)))
return -EIO; return -EIO;
assert(si.ssi_signo < _NSIG);
read_one = true; read_one = true;
if (si.ssi_signo == SIGCHLD) { if (si.ssi_signo == SIGCHLD) {