Ziele Untersuchung
mit Columbo Integrität von
Datenbanken Interaktion und
Portierbarkeit Ergonomie der
Schnittstellen

Angebot Produkte Projekt Beratung

Mittel Analytik Modellierung Sprachen Algebra Logik Hardware Denken Kreativität

Zusammenhänge Gesellschaft Wirtschaft Branche Firma


products/sources/formale Sprachen/C/Firefox/config/ (Browser von der Mozilla Stiftung Version 136.0.1^©) Datei vom 10.2.2025 mit Größe 3 kB

Quelle pathsub.c Sprache: C

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
** Pathname subroutines.
**
** Brendan Eich, 8/29/95
*/
#include <assert.h>
#include <sys/types.h>
#include <dirent.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include "pathsub.h"

#ifdef USE_REENTRANT_LIBC
#  include <libc_r.h>
#endif

#ifdef SUNOS4
#  include "sunos4.h"
#endif

char* program;

void fail(const char* format, ...) {
  int error;
  va_list ap;

#ifdef USE_REENTRANT_LIBC
  R_STRERROR_INIT_R();
#endif

  error = errno;
  fprintf(stderr, "%s: ", program);
  va_start(ap, format);
  vfprintf(stderr, format, ap);
  va_end(ap);
  if (error) {
#ifdef USE_REENTRANT_LIBC
    R_STRERROR_R(errno);
    fprintf(stderr, ": %s", r_strerror_r);
#else
    fprintf(stderr, ": %s", strerror(errno));
#endif
  }

  putc('\n', stderr);
  exit(1);
}

char* getcomponent(char* path, char* name) {
  if (*path == '\0') return 0;
  if (*path == '/') {
    *name++ = '/';
  } else {
    do {
      *name++ = *path++;
    } while (*path != '/' && *path != '\0');
  }
  *name = '\0';
  while (*path == '/') path++;
  return path;
}

#ifdef LAME_READDIR
#  include <sys/param.h>
/*
** The static buffer in Unixware's readdir is too small.
*/
struct dirent* readdir(DIR* d) {
  static struct dirent* buf = NULL;

  if (buf == NULL)
    buf = (struct dirent*)malloc(sizeof(struct dirent) + MAXPATHLEN);
  return (readdir_r(d, buf));
}
#endif

char* ino2name(ino_t ino) {
  DIR* dp;
  struct dirent* ep;
  char* name;

  dp = opendir("..");
  if (!dp) fail("cannot read parent directory");
  for (;;) {
    if (!(ep = readdir(dp))) fail("cannot find current directory");
    if (ep->d_ino == ino) break;
  }
  name = xstrdup(ep->d_name);
  closedir(dp);
  return name;
}

void* xmalloc(size_t size) {
  void* p = malloc(size);
  if (!p) fail("cannot allocate %u bytes", size);
  return p;
}

char* xstrdup(char* s) { return strcpy(xmalloc(strlen(s) + 1), s); }

char* xbasename(char* path) {
  char* cp;

  while ((cp = strrchr(path, '/')) && cp[1] == '\0') *cp = '\0';
  if (!cp) return path;
  return cp + 1;
}

void xchdir(const char* dir) {
  if (chdir(dir) < 0) fail("cannot change directory to %s", dir);
}

int relatepaths(char* from, char* to, char* outpath) {
  char *cp, *cp2;
  int len;
  char buf[NAME_MAX];

  assert(*from == '/' && *to == '/');
  for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
    if (*cp == '\0') break;
  while (cp[-1] != '/') cp--, cp2--;
  if (cp - 1 == to) {
    /* closest common ancestor is /, so use full pathname */
    len = strlen(strcpy(outpath, to));
    if (outpath[len] != '/') {
      outpath[len++] = '/';
      outpath[len] = '\0';
    }
  } else {
    len = 0;
    while ((cp2 = getcomponent(cp2, buf)) != 0) {
      strcpy(outpath + len, "../");
      len += 3;
    }
    while ((cp = getcomponent(cp, buf)) != 0) {
      sprintf(outpath + len, "%s/", buf);
      len += strlen(outpath + len);
    }
  }
  return len;
}

void reversepath(char* inpath, char* name, int len, char* outpath) {
  char *cp, *cp2;
  char buf[NAME_MAX];
  struct stat sb;

  cp = strcpy(outpath + PATH_MAX - (len + 1), name);
  cp2 = inpath;
  while ((cp2 = getcomponent(cp2, buf)) != 0) {
    if (strcmp(buf, ".") == 0) continue;
    if (strcmp(buf, "..") == 0) {
      if (stat(".", &sb) < 0) fail("cannot stat current directory");
      name = ino2name(sb.st_ino);
      len = strlen(name);
      cp -= len + 1;
      strcpy(cp, name);
      cp[len] = '/';
      free(name);
      xchdir("..");
    } else {
      cp -= 3;
      strncpy(cp, "../", 3);
      xchdir(buf);
    }
  }
  strcpy(outpath, cp);
}

quality97%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.