Revision 8ed0a740dd42bd0724aebed6e3b07c4ea2a2d5e8 authored by Matt McCutchen on 17 October 2008, 02:32:14 UTC, committed by Junio C Hamano on 17 October 2008, 02:37:27 UTC
This test creates files with several different umasks and expects their permissions to be initialized according to the umask, so a default ACL on the trash directory (which overrides the umask for files created in that directory) causes the test to fail. To avoid that, remove the default ACL if possible with setfacl(1). Signed-off-by: Matt McCutchen <matt@mattmccutchen.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 5782566
lockfile.c
/*
* Copyright (c) 2005, Junio C Hamano
*/
#include "cache.h"
static struct lock_file *lock_file_list;
static const char *alternate_index_output;
static void remove_lock_file(void)
{
pid_t me = getpid();
while (lock_file_list) {
if (lock_file_list->owner == me &&
lock_file_list->filename[0]) {
if (lock_file_list->fd >= 0)
close(lock_file_list->fd);
unlink(lock_file_list->filename);
}
lock_file_list = lock_file_list->next;
}
}
static void remove_lock_file_on_signal(int signo)
{
remove_lock_file();
signal(signo, SIG_DFL);
raise(signo);
}
/*
* p = absolute or relative path name
*
* Return a pointer into p showing the beginning of the last path name
* element. If p is empty or the root directory ("/"), just return p.
*/
static char *last_path_elm(char *p)
{
/* r starts pointing to null at the end of the string */
char *r = strchr(p, '\0');
if (r == p)
return p; /* just return empty string */
r--; /* back up to last non-null character */
/* back up past trailing slashes, if any */
while (r > p && *r == '/')
r--;
/*
* then go backwards until I hit a slash, or the beginning of
* the string
*/
while (r > p && *(r-1) != '/')
r--;
return r;
}
/* We allow "recursive" symbolic links. Only within reason, though */
#define MAXDEPTH 5
/*
* p = path that may be a symlink
* s = full size of p
*
* If p is a symlink, attempt to overwrite p with a path to the real
* file or directory (which may or may not exist), following a chain of
* symlinks if necessary. Otherwise, leave p unmodified.
*
* This is a best-effort routine. If an error occurs, p will either be
* left unmodified or will name a different symlink in a symlink chain
* that started with p's initial contents.
*
* Always returns p.
*/
static char *resolve_symlink(char *p, size_t s)
{
int depth = MAXDEPTH;
while (depth--) {
char link[PATH_MAX];
int link_len = readlink(p, link, sizeof(link));
if (link_len < 0) {
/* not a symlink anymore */
return p;
}
else if (link_len < sizeof(link))
/* readlink() never null-terminates */
link[link_len] = '\0';
else {
warning("%s: symlink too long", p);
return p;
}
if (is_absolute_path(link)) {
/* absolute path simply replaces p */
if (link_len < s)
strcpy(p, link);
else {
warning("%s: symlink too long", p);
return p;
}
} else {
/*
* link is a relative path, so I must replace the
* last element of p with it.
*/
char *r = (char*)last_path_elm(p);
if (r - p + link_len < s)
strcpy(r, link);
else {
warning("%s: symlink too long", p);
return p;
}
}
}
return p;
}
static int lock_file(struct lock_file *lk, const char *path)
{
if (strlen(path) >= sizeof(lk->filename)) return -1;
strcpy(lk->filename, path);
/*
* subtract 5 from size to make sure there's room for adding
* ".lock" for the lock file name
*/
resolve_symlink(lk->filename, sizeof(lk->filename)-5);
strcat(lk->filename, ".lock");
lk->fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
if (0 <= lk->fd) {
if (!lock_file_list) {
signal(SIGINT, remove_lock_file_on_signal);
signal(SIGHUP, remove_lock_file_on_signal);
signal(SIGTERM, remove_lock_file_on_signal);
signal(SIGQUIT, remove_lock_file_on_signal);
atexit(remove_lock_file);
}
lk->owner = getpid();
if (!lk->on_list) {
lk->next = lock_file_list;
lock_file_list = lk;
lk->on_list = 1;
}
if (adjust_shared_perm(lk->filename))
return error("cannot fix permission bits on %s",
lk->filename);
}
else
lk->filename[0] = 0;
return lk->fd;
}
int hold_lock_file_for_update(struct lock_file *lk, const char *path, int die_on_error)
{
int fd = lock_file(lk, path);
if (fd < 0 && die_on_error)
die("unable to create '%s.lock': %s", path, strerror(errno));
return fd;
}
int hold_lock_file_for_append(struct lock_file *lk, const char *path, int die_on_error)
{
int fd, orig_fd;
fd = lock_file(lk, path);
if (fd < 0) {
if (die_on_error)
die("unable to create '%s.lock': %s", path, strerror(errno));
return fd;
}
orig_fd = open(path, O_RDONLY);
if (orig_fd < 0) {
if (errno != ENOENT) {
if (die_on_error)
die("cannot open '%s' for copying", path);
close(fd);
return error("cannot open '%s' for copying", path);
}
} else if (copy_fd(orig_fd, fd)) {
if (die_on_error)
exit(128);
close(fd);
return -1;
}
return fd;
}
int close_lock_file(struct lock_file *lk)
{
int fd = lk->fd;
lk->fd = -1;
return close(fd);
}
int commit_lock_file(struct lock_file *lk)
{
char result_file[PATH_MAX];
size_t i;
if (lk->fd >= 0 && close_lock_file(lk))
return -1;
strcpy(result_file, lk->filename);
i = strlen(result_file) - 5; /* .lock */
result_file[i] = 0;
if (rename(lk->filename, result_file))
return -1;
lk->filename[0] = 0;
return 0;
}
int hold_locked_index(struct lock_file *lk, int die_on_error)
{
return hold_lock_file_for_update(lk, get_index_file(), die_on_error);
}
void set_alternate_index_output(const char *name)
{
alternate_index_output = name;
}
int commit_locked_index(struct lock_file *lk)
{
if (alternate_index_output) {
if (lk->fd >= 0 && close_lock_file(lk))
return -1;
if (rename(lk->filename, alternate_index_output))
return -1;
lk->filename[0] = 0;
return 0;
}
else
return commit_lock_file(lk);
}
void rollback_lock_file(struct lock_file *lk)
{
if (lk->filename[0]) {
if (lk->fd >= 0)
close(lk->fd);
unlink(lk->filename);
}
lk->filename[0] = 0;
}
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...