int git_futils_creat_locked_withpath(const char *path, const mode_t dirmode, const mode_t mode)
{
if (git_futils_mkpath2file(path, dirmode) < 0)
return -1;
return git_futils_creat_locked(path, mode);
}
int git_futils_creat_locked_withpath(const char *path, int mode)
{
if (git_futils_mkpath2file(path) < GIT_SUCCESS)
return git__throw(GIT_EOSERR, "Failed to create locked file %s", path);
return git_futils_creat_locked(path, mode);
}
static int lock_file(git_filebuf *file, int flags)
{
if (git_path_exists(file->path_lock) == true) {
if (flags & GIT_FILEBUF_FORCE)
p_unlink(file->path_lock);
else {
giterr_clear(); /* actual OS error code just confuses */
giterr_set(GITERR_OS,
"Failed to lock file '%s' for writing", file->path_lock);
return -1;
}
}
/* create path to the file buffer is required */
if (flags & GIT_FILEBUF_FORCE) {
/* XXX: Should dirmode here be configurable? Or is 0777 always fine? */
file->fd = git_futils_creat_locked_withpath(file->path_lock, 0777, GIT_LOCK_FILE_MODE);
} else {
file->fd = git_futils_creat_locked(file->path_lock, GIT_LOCK_FILE_MODE);
}
if (file->fd < 0)
return -1;
file->fd_is_open = true;
if ((flags & GIT_FILEBUF_APPEND) && git_path_exists(file->path_original) == true) {
git_file source;
char buffer[2048];
ssize_t read_bytes;
source = p_open(file->path_original, O_RDONLY);
if (source < 0) {
giterr_set(GITERR_OS,
"Failed to open file '%s' for reading",
file->path_original);
return -1;
}
while ((read_bytes = p_read(source, buffer, sizeof(buffer))) > 0) {
p_write(file->fd, buffer, read_bytes);
if (file->digest)
git_hash_update(file->digest, buffer, read_bytes);
}
p_close(source);
if (read_bytes < 0) {
giterr_set(GITERR_OS, "Failed to read file '%s'", file->path_original);
return -1;
}
}
return 0;
}
