[PATCH] linux: make getcwd(3) fail if it cannot obtain an absolute path [BZ #22679]

[Andreas Schwab]

On Feb 05 2018, Florian Weimer <fweimer@redhat.com> wrote:

> /* Like chdir(), but it keeps track of the current directory (in the
>  * global "curr_dir"), and ensures that the path size doesn't overflow.
>  * Also cleans the path using the clean_fname() function. */
> int change_dir(const char *dir, int set_path_only)
> {
> 	static int initialised, skipped_chdir;
> 	unsigned int len;
>
> 	if (!initialised) {
> 		initialised = 1;
> 		if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) {
> 			rsyserr(FERROR, errno, "getcwd()");
> 			exit_cleanup(RERR_FILESELECT);
> 		}
> 		curr_dir_len = strlen(curr_dir);
> 	}

This will also fail when rsync is started from a directory that has
since been removed, where getcwd (even the syscall) has always returned
an error.  So this isn't a new failure.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."