The following reply was made to PR kern/82980; it has been noted by GNATS. From: dfil...@freebsd.org (dfilter service) To: bug-follo...@freebsd.org Cc: Subject: Re: kern/82980: commit references a PR Date: Sun, 13 Apr 2014 19:48:32 +0000 (UTC)
Author: jilles Date: Sun Apr 13 19:48:28 2014 New Revision: 264417 URL: http://svnweb.freebsd.org/changeset/base/264417 Log: realpath(): Properly fail "." or ".." components after non-directories. If realpath() is called on pathnames like "/dev/null/." or "/dev/null/..", it should fail with [ENOTDIR]. Pathnames like "/dev/null/" already failed as they should. Also, put the check for non-directories after lstatting the previous component instead of when the empty component (consecutive or trailing slashes) is detected, saving an lstat() call and some lines of code. PR: kern/82980 MFC after: 2 weeks Modified: head/lib/libc/stdlib/realpath.c Modified: head/lib/libc/stdlib/realpath.c ============================================================================== --- head/lib/libc/stdlib/realpath.c Sun Apr 13 18:51:39 2014 (r264416) +++ head/lib/libc/stdlib/realpath.c Sun Apr 13 19:48:28 2014 (r264417) @@ -132,26 +132,7 @@ realpath(const char * __restrict path, c resolved[resolved_len] = '\0'; } if (next_token[0] == '\0') { - /* - * Handle consequential slashes. The path - * before slash shall point to a directory. - * - * Only the trailing slashes are not covered - * by other checks in the loop, but we verify - * the prefix for any (rare) "//" or "/\0" - * occurrence to not implement lookahead. - */ - if (lstat(resolved, &sb) != 0) { - if (m) - free(resolved); - return (NULL); - } - if (!S_ISDIR(sb.st_mode)) { - if (m) - free(resolved); - errno = ENOTDIR; - return (NULL); - } + /* Handle consequential slashes. */ continue; } else if (strcmp(next_token, ".") == 0) @@ -236,6 +217,11 @@ realpath(const char * __restrict path, c } } left_len = strlcpy(left, symlink, sizeof(left)); + } else if (!S_ISDIR(sb.st_mode) && p != NULL) { + if (m) + free(resolved); + errno = ENOTDIR; + return (NULL); } } _______________________________________________ svn-src-...@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org" _______________________________________________ freebsd-bugs@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "freebsd-bugs-unsubscr...@freebsd.org"
