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6a1f79c1f1
So far, e.g. git-update-index --refresh was basically uninterruptable by ctrl-c, since it hooked the SIGINT handler, but that handler would only unlink the lockfile but not actually quit. This makes it propagate the signal to the default handler. Note that I expected it to work without resetting the signal handler to SIG_DFL, but without that it ended in an infinite loop of tgkill()s - is my glibc violating SUS or what? Signed-off-by: Petr Baudis <pasky@suse.cz> Signed-off-by: Junio C Hamano <junkio@cox.net>
57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
/*
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* Copyright (c) 2005, Junio C Hamano
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*/
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#include <signal.h>
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#include "cache.h"
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static struct cache_file *cache_file_list;
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static void remove_lock_file(void)
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{
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while (cache_file_list) {
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if (cache_file_list->lockfile[0])
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unlink(cache_file_list->lockfile);
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cache_file_list = cache_file_list->next;
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}
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}
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static void remove_lock_file_on_signal(int signo)
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{
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remove_lock_file();
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signal(SIGINT, SIG_DFL);
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raise(signo);
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}
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int hold_index_file_for_update(struct cache_file *cf, const char *path)
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{
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int fd;
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sprintf(cf->lockfile, "%s.lock", path);
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fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
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if (fd >=0 && !cf->next) {
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cf->next = cache_file_list;
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cache_file_list = cf;
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signal(SIGINT, remove_lock_file_on_signal);
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atexit(remove_lock_file);
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}
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return fd;
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}
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int commit_index_file(struct cache_file *cf)
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{
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char indexfile[PATH_MAX];
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int i;
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strcpy(indexfile, cf->lockfile);
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i = strlen(indexfile) - 5; /* .lock */
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indexfile[i] = 0;
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i = rename(cf->lockfile, indexfile);
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cf->lockfile[0] = 0;
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return i;
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}
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void rollback_index_file(struct cache_file *cf)
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{
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if (cf->lockfile[0])
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unlink(cf->lockfile);
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cf->lockfile[0] = 0;
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}
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