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refactor signal handling for cleanup functions

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The current code is very inconsistent about which signals
are caught for doing cleanup of temporary files and lock
files. Some callsites checked only SIGINT, while others
checked a variety of death-dealing signals.

This patch factors out those signals to a single function,
and then calls it everywhere. For some sites, that means
this is a simple clean up. For others, it is an improvement
in that they will now properly clean themselves up after a
larger variety of signals.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2009-01-22 01:03:08 -05:00 committed by Junio C Hamano
parent 4a16d07272
commit 57b235a4bc
8 changed files with 17 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
builtin-clone.c
View File

@ -439,7 +439,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
}
junk_git_dir = git_dir;
atexit(remove_junk);
sigchain_push(SIGINT, remove_junk_on_signal);
sigchain_push_common(remove_junk_on_signal);
setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1);

2
builtin-fetch--tool.c
View File

@ -246,7 +246,7 @@ static int fetch_native_store(FILE *fp,
char buffer[1024];
int err = 0;
sigchain_push(SIGINT, remove_keep_on_signal);
sigchain_push_common(remove_keep_on_signal);
atexit(remove_keep);
while (fgets(buffer, sizeof(buffer), stdin)) {

2
builtin-fetch.c
View File

@ -673,7 +673,7 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
ref_nr = j;
}
sigchain_push(SIGINT, unlock_pack_on_signal);
sigchain_push_common(unlock_pack_on_signal);
atexit(unlock_pack);
exit_code = do_fetch(transport,
parse_fetch_refspec(ref_nr, refs), ref_nr);

2
diff.c
View File

@ -1903,7 +1903,7 @@ static struct diff_tempfile *prepare_temp_file(const char *name,
if (!remove_tempfile_installed) {
atexit(remove_tempfile);
sigchain_push(SIGINT, remove_tempfile_on_signal);
sigchain_push_common(remove_tempfile_on_signal);
remove_tempfile_installed = 1;
}

5
http-push.c
View File

@ -2262,10 +2262,7 @@ int main(int argc, char **argv)
goto cleanup;
}
sigchain_push(SIGINT, remove_locks_on_signal);
sigchain_push(SIGHUP, remove_locks_on_signal);
sigchain_push(SIGQUIT, remove_locks_on_signal);
sigchain_push(SIGTERM, remove_locks_on_signal);
sigchain_push_common(remove_locks_on_signal);
/* Check whether the remote has server info files */
remote->can_update_info_refs = 0;

6
lockfile.c
View File

@ -137,11 +137,7 @@ static int lock_file(struct lock_file *lk, const char *path, int flags)
lk->fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
if (0 <= lk->fd) {
if (!lock_file_list) {
sigchain_push(SIGINT, remove_lock_file_on_signal);
sigchain_push(SIGHUP, remove_lock_file_on_signal);
sigchain_push(SIGTERM, remove_lock_file_on_signal);
sigchain_push(SIGQUIT, remove_lock_file_on_signal);
sigchain_push(SIGPIPE, remove_lock_file_on_signal);
sigchain_push_common(remove_lock_file_on_signal);
atexit(remove_lock_file);
}
lk->owner = getpid();

9
sigchain.c
View File

@ -41,3 +41,12 @@ int sigchain_pop(int sig)
s->n--;
return 0;
}
void sigchain_push_common(sigchain_fun f)
{
sigchain_push(SIGINT, f);
sigchain_push(SIGHUP, f);
sigchain_push(SIGTERM, f);
sigchain_push(SIGQUIT, f);
sigchain_push(SIGPIPE, f);
}

2
sigchain.h
View File

@ -6,4 +6,6 @@ typedef void (*sigchain_fun)(int);
int sigchain_push(int sig, sigchain_fun f);
int sigchain_pop(int sig);
void sigchain_push_common(sigchain_fun f);
#endif /* SIGCHAIN_H */