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27756: add OS file locking to calendar

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add errflag test to loop over fcntl()
This commit is contained in:
Peter Stephenson 2010-02-26 12:09:20 +00:00
parent ecc7dc91f6
commit 07b6256d8e
7 changed files with 57 additions and 9 deletions
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4
Src/Modules/system.c
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@ -463,6 +463,8 @@ bin_zsystem_flock(char *nam, char **args, UNUSED(Options ops), UNUSED(int func))
if (timeout > 0) {
time_t end = time(NULL) + (time_t)timeout;
while (fcntl(flock_fd, F_SETLK, &lck) < 0) {
if (errflag)
return 1;
if (errno != EINTR && errno != EACCES && errno != EAGAIN) {
zwarnnam(nam, "failed to lock file %s: %e", args[0], errno);
return 1;
@ -473,6 +475,8 @@ bin_zsystem_flock(char *nam, char **args, UNUSED(Options ops), UNUSED(int func))
}
} else {
while (fcntl(flock_fd, F_SETLKW, &lck) < 0) {
if (errflag)
return 1;
if (errno == EINTR)
continue;
zwarnnam(nam, "failed to lock file %s: %e", args[0], errno);