+++ /dev/null
-/*
- +----------------------------------------------------------------------+
- | PHP version 4.0 |
- +----------------------------------------------------------------------+
- | Copyright (c) 1997, 1998, 1999, 2000 The PHP Group |
- +----------------------------------------------------------------------+
- | This source file is subject to version 2.02 of the PHP license, |
- | that is bundled with this package in the file LICENSE, and is |
- | available at through the world-wide-web at |
- | http://www.php.net/license/2_02.txt. |
- | If you did not receive a copy of the PHP license and are unable to |
- | obtain it through the world-wide-web, please send a note to |
- | license@php.net so we can mail you a copy immediately. |
- +----------------------------------------------------------------------+
- | Author: Sander Steffann (sander@steffann.nl) |
- +----------------------------------------------------------------------+
- */
-
-#include "php.h"
-
-#if HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-#include <sys/stat.h>
-
-#ifndef MAXSYMLINKS
-#define MAXSYMLINKS 32
-#endif
-
-#ifndef S_ISDIR
-#define S_ISDIR(mode) (((mode)&S_IFMT) == S_IFDIR)
-#endif
-
-char *php_realpath(char *path, char resolved_path[]);
-
-char *php_realpath(char *path, char resolved_path []) {
- char path_construction[MAXPATHLEN]; /* We build the result in here */
- char *writepos; /* Position to write next char */
-
- char path_copy[MAXPATHLEN]; /* A work-copy of the path */
- char *workpos; /* working position in *path */
-
-#if !defined(PHP_WIN32)
- char buf[MAXPATHLEN]; /* Buffer for readlink */
- int linklength; /* The result from readlink */
-#endif
- int linkcount = 0; /* Count symlinks to avoid loops */
-
- struct stat filestat; /* result from stat */
-
-#ifdef PHP_WIN32
- char *temppos; /* position while counting '.' */
- int dotcount; /* number of '.' */
- int t; /* counter */
-#endif
-
- /* Set the work-position to the beginning of the given path */
- strcpy(path_copy, path);
- workpos = path_copy;
-
-#ifdef PHP_WIN32
- /* Find out where we start - Windows version */
- if ((*workpos == '\\') || (*workpos == '/')) {
- /* We start at the root of the current drive */
- /* Get the current directory */
- if (V_GETCWD(path_construction, MAXPATHLEN-1) == NULL) {
- /* Unable to get cwd */
- resolved_path[0] = 0;
- return NULL;
- }
- /* We only need the first three chars (for example "C:\") */
- path_construction[3] = 0;
- workpos++;
- } else if (workpos[1] == ':') {
- /* A drive-letter is specified, copy it */
- strncpy(path_construction, path, 2);
- strcat(path_construction, "\\");
- workpos++;
- workpos++;
- } else {
- /* Use the current directory */
- if (V_GETCWD(path_construction, MAXPATHLEN-1) == NULL) {
- /* Unable to get cwd */
- resolved_path[0] = 0;
- return NULL;
- }
- strcat(path_construction, "\\");
- }
-#else
- /* Find out where we start - Unix version */
- if (*workpos == '/') {
- /* We start at the root */
- strcpy(path_construction, "/");
- workpos++;
- } else {
- /* Use the current directory */
- if (V_GETCWD(path_construction, MAXPATHLEN-1) == NULL) {
- /* Unable to get cwd */
- resolved_path[0] = 0;
- return NULL;
- }
- strcat(path_construction, "/");
- }
-#endif
-
- /* Set the next-char-position */
- writepos = &path_construction[strlen(path_construction)];
-
- /* Go to the end, then stop */
- while(*workpos != 0) {
- /* Strip (back)slashes */
-#ifdef PHP_WIN32
- while(*workpos == '\\') workpos++;
-#else
- while(*workpos == '/') workpos++;
-#endif
-
-#ifdef PHP_WIN32
- /* reset dotcount */
- dotcount = 0;
-
- /* Look for .. */
- if ((workpos[0] == '.') && (workpos[1] != 0)) {
- /* Windows accepts \...\ as \..\..\, \....\ as \..\..\..\, etc */
- /* At least Win98 does */
-
- temppos = workpos;
- while(*temppos++ == '.') {
- dotcount++;
- if ((*temppos != '\\') && (*temppos != 0) && (*temppos != '.')) {
- /* This is not a /../ component, but a filename that starts with '.' */
- dotcount = 0;
- }
- }
-
- /* Go back dotcount-1 times */
- for (t=0 ; t<(dotcount-1) ; t++) {
- workpos++; /* move to next '.' */
-
- /* Can we still go back? */
- if ((writepos-3) <= path_construction) return NULL;
-
- /* Go back */
- writepos--; /* move to '\' */
- while(*--writepos != '\\') ; /* skip until previous '\\' */
- }
- }
-
- /* No special case */
- if (dotcount == 0) {
- /* Append */
- while((*workpos != '\\') && (*workpos != 0)) {
- *writepos++ = *workpos++;
- }
- }
-
- /* Just one '.', go to next element */
- if (dotcount == 1) {
- while((*workpos != '\\') && (*workpos != 0)) {
- *workpos++;
- }
-
- /* Avoid double \ in the result */
- writepos--;
- }
-
- /* If it was a directory, append a slash */
- if (*workpos == '\\') {
- *writepos++ = *workpos++;
- }
- *writepos = 0;
-#else /* defined(PHP_WIN32) */
- /* Look for .. */
- if ((workpos[0] == '.') && (workpos[1] != 0)) {
- if ((workpos[1] == '.') && ((workpos[2] == '/') || (workpos[2] == 0))) {
- /* One directory back */
- /* Set pointers to right position */
- workpos++; /* move to second '.' */
- workpos++; /* move to '/' */
-
- /* Only apply .. if not in root */
- if ((writepos-1) > path_construction) {
- writepos--; /* move to '/' */
- while(*--writepos != '/') ; /* skip until previous '/' */
- }
- } else {
- if (workpos[1] == '/') {
- /* Found a /./ skip it */
- workpos++; /* move to '/' */
-
- /* Avoid double / in the result */
- writepos--;
- } else {
- /* No special case, the name just started with a . */
- /* Append */
- while((*workpos != '/') && (*workpos != 0)) {
- *writepos++ = *workpos++;
- }
- }
- }
- } else {
- /* No special case */
- /* Append */
- while((*workpos != '/') && (*workpos != 0)) {
- *writepos++ = *workpos++;
- }
- }
-
-#if HAVE_SYMLINK
- /* We are going to use path_construction, so close it */
- *writepos = 0;
-
- /* Check the current location to see if it is a symlink */
- if((linklength = readlink(path_construction, buf, MAXPATHLEN)) != -1) {
- /* Check linkcount */
- if (linkcount > MAXSYMLINKS) return NULL;
-
- /* Count this symlink */
- linkcount++;
-
- /* Set end of buf */
- buf[linklength] = 0;
-
- /* Check for overflow */
- if ((strlen(workpos) + strlen(buf) + 1) >= MAXPATHLEN) return NULL;
-
- /* Remove the symlink-component wrom path_construction */
- writepos--; /* move to '/' */
- while(*--writepos != '/') ; /* skip until previous '/' */
- *++writepos = 0; /* end of string after '/' */
-
- /* If the symlink starts with a '/', empty path_construction */
- if (*buf == '/') {
- *path_construction = 0;
- writepos = path_construction;
- }
-
- /* Insert symlink into path_copy */
- strcat(buf, workpos);
- strcpy(path_copy, buf);
- workpos = path_copy;
- }
-#endif /* HAVE_SYMLINK */
-
- /* If it was a directory, append a slash */
- if (*workpos == '/') {
- *writepos++ = *workpos++;
- }
- *writepos = 0;
-#endif /* defined(PHP_WIN32) */
- }
-
- /* Check if the resolved path is a directory */
- if (V_STAT(path_construction, &filestat) != 0) {
- if (errno != ENOENT) return NULL;
- } else {
- if (S_ISDIR(filestat.st_mode)) {
- /* It's a directory, append a / if needed */
- if (*(writepos-1) != '/') {
- /* Check for overflow */
- if ((strlen(workpos) + 2) >= MAXPATHLEN) {
- return NULL;
- }
- *writepos++ = '/';
- *writepos = 0;
- }
- }
- }
-
- strcpy(resolved_path, path_construction);
- return resolved_path;
-}
-
-/*
- * Local variables:
- * tab-width: 4
- * c-basic-offset: 4
- * End:
- */
projects / php / commitdiff