From 0f7a044109b860443ecaa4f8a37652b1b4423057 Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Mon, 21 Aug 2006 07:26:38 +0000 Subject: Remove from CVS, since the bootstrap script generates them automatically. --- lib/mkancesdirs.c | 132 ------------------------------------------------------ 1 file changed, 132 deletions(-) delete mode 100644 lib/mkancesdirs.c (limited to 'lib/mkancesdirs.c') diff --git a/lib/mkancesdirs.c b/lib/mkancesdirs.c deleted file mode 100644 index 473774236..000000000 --- a/lib/mkancesdirs.c +++ /dev/null @@ -1,132 +0,0 @@ -/* Make a file's ancestor directories. - - Copyright (C) 2006 Free Software Foundation, Inc. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2, or (at your option) - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -/* Written by Paul Eggert. */ - -#ifdef HAVE_CONFIG_H -# include -#endif - -#include "mkancesdirs.h" - -#include -#include - -#include "dirname.h" -#include "stat-macros.h" - -/* Return 0 if FILE is a directory, otherwise -1 (setting errno). */ - -static int -test_dir (char const *file) -{ - struct stat st; - if (stat (file, &st) == 0) - { - if (S_ISDIR (st.st_mode)) - return 0; - errno = ENOTDIR; - } - return -1; -} - -/* Ensure that the ancestor directories of FILE exist, using an - algorithm that should work even if two processes execute this - function in parallel. Temporarily modify FILE by storing '\0' - bytes into it, to access the ancestor directories. - - Create any ancestor directories that don't already exist, by - invoking MAKE_DIR (ANCESTOR, MAKE_DIR_ARG). This function should - return zero if successful, -1 (setting errno) otherwise. - - If successful, return 0 with FILE set back to its original value; - otherwise, return -1 (setting errno), storing a '\0' into *FILE so - that it names the ancestor directory that had problems. */ - -int -mkancesdirs (char *file, - int (*make_dir) (char const *, void *), - void *make_dir_arg) -{ - /* This algorithm is O(N**2) but in typical practice the fancier - O(N) algorithms are slower. */ - - /* Address of the previous directory separator that follows an - ordinary byte in a file name in the left-to-right scan, or NULL - if no such separator precedes the current location P. */ - char *sep = NULL; - - char const *prefix_end = file + FILE_SYSTEM_PREFIX_LEN (file); - char *p; - char c; - - /* Search backward through FILE using mkdir to create the - furthest-away ancestor that is needed. This loop isn't needed - for correctness, but typically ancestors already exist so this - loop speeds things up a bit. - - This loop runs a bit faster if errno initially contains an error - number corresponding to a failed access to FILE. However, things - work correctly regardless of errno's initial value. */ - - for (p = last_component (file); prefix_end < p; p--) - if (ISSLASH (*p) && ! ISSLASH (p[-1])) - { - *p = '\0'; - - if (errno == ENOENT && make_dir (file, make_dir_arg) == 0) - { - *p = '/'; - break; - } - - if (errno != ENOENT) - { - if (test_dir (file) == 0) - { - *p = '/'; - break; - } - if (errno != ENOENT) - return -1; - } - - *p = '/'; - } - - /* Scan forward through FILE, creating directories along the way. - Try mkdir before stat, so that the procedure works even when two - or more processes are executing it in parallel. */ - - while ((c = *p++)) - if (ISSLASH (*p)) - { - if (! ISSLASH (c)) - sep = p; - } - else if (ISSLASH (c) && *p && sep) - { - *sep = '\0'; - if (make_dir (file, make_dir_arg) != 0 && test_dir (file) != 0) - return -1; - *sep = '/'; - } - - - return 0; -} -- cgit v1.2.3-70-g09d2