mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-08-14 10:29:31 +00:00
216 lines
4.0 KiB
C
216 lines
4.0 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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** Pathname subroutines.
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**
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** Brendan Eich, 8/29/95
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*/
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#include <assert.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include "pathsub.h"
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#ifdef USE_REENTRANT_LIBC
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#include <libc_r.h>
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#endif
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#ifdef SUNOS4
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#include "sunos4.h"
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#endif
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#ifndef D_INO
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#define D_INO d_ino
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#endif
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char *program;
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void
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fail(const char *format, ...)
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{
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int error;
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va_list ap;
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#ifdef USE_REENTRANT_LIBC
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R_STRERROR_INIT_R();
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#endif
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error = errno;
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fprintf(stderr, "%s: ", program);
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va_start(ap, format);
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vfprintf(stderr, format, ap);
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va_end(ap);
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if (error) {
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#ifdef USE_REENTRANT_LIBC
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R_STRERROR_R(errno);
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fprintf(stderr, ": %s", r_strerror_r);
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#else
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fprintf(stderr, ": %s", strerror(errno));
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#endif
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}
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putc('\n', stderr);
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exit(1);
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}
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char *
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getcomponent(char *path, char *name)
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{
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if (*path == '\0')
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return 0;
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if (*path == '/') {
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*name++ = '/';
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} else {
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do {
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*name++ = *path++;
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} while (*path != '/' && *path != '\0');
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}
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*name = '\0';
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while (*path == '/')
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path++;
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return path;
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}
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#ifdef LAME_READDIR
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#include <sys/param.h>
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/*
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** The static buffer in Unixware's readdir is too small.
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*/
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struct dirent *readdir(DIR *d)
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{
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static struct dirent *buf = NULL;
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if(buf == NULL)
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buf = (struct dirent *) malloc(sizeof(struct dirent) + MAXPATHLEN);
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return(readdir_r(d, buf));
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}
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#endif
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char *
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ino2name(ino_t ino)
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{
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DIR *dp;
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struct dirent *ep;
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char *name;
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dp = opendir("..");
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if (!dp)
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fail("cannot read parent directory");
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for (;;) {
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if (!(ep = readdir(dp)))
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fail("cannot find current directory");
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if (ep->D_INO == ino)
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break;
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}
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name = xstrdup(ep->d_name);
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closedir(dp);
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return name;
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}
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void *
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xmalloc(size_t size)
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{
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void *p = malloc(size);
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if (!p)
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fail("cannot allocate %u bytes", size);
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return p;
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}
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char *
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xstrdup(char *s)
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{
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return strcpy(xmalloc(strlen(s) + 1), s);
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}
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char *
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xbasename(char *path)
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{
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char *cp;
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while ((cp = strrchr(path, '/')) && cp[1] == '\0')
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*cp = '\0';
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if (!cp) return path;
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return cp + 1;
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}
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void
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xchdir(const char *dir)
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{
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if (chdir(dir) < 0)
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fail("cannot change directory to %s", dir);
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}
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int
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relatepaths(char *from, char *to, char *outpath)
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{
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char *cp, *cp2;
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int len;
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char buf[NAME_MAX];
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assert(*from == '/' && *to == '/');
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for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
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if (*cp == '\0')
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break;
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while (cp[-1] != '/')
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cp--, cp2--;
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if (cp - 1 == to) {
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/* closest common ancestor is /, so use full pathname */
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len = strlen(strcpy(outpath, to));
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if (outpath[len] != '/') {
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outpath[len++] = '/';
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outpath[len] = '\0';
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}
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} else {
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len = 0;
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while ((cp2 = getcomponent(cp2, buf)) != 0) {
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strcpy(outpath + len, "../");
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len += 3;
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}
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while ((cp = getcomponent(cp, buf)) != 0) {
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sprintf(outpath + len, "%s/", buf);
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len += strlen(outpath + len);
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}
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}
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return len;
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}
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void
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reversepath(char *inpath, char *name, int len, char *outpath)
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{
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char *cp, *cp2;
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char buf[NAME_MAX];
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struct stat sb;
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cp = strcpy(outpath + PATH_MAX - (len + 1), name);
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cp2 = inpath;
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while ((cp2 = getcomponent(cp2, buf)) != 0) {
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if (strcmp(buf, ".") == 0)
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continue;
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if (strcmp(buf, "..") == 0) {
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if (stat(".", &sb) < 0)
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fail("cannot stat current directory");
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name = ino2name(sb.st_ino);
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len = strlen(name);
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cp -= len + 1;
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strcpy(cp, name);
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cp[len] = '/';
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free(name);
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xchdir("..");
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} else {
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cp -= 3;
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strncpy(cp, "../", 3);
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xchdir(buf);
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}
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}
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strcpy(outpath, cp);
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}
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