tor-browser

The Tor Browser
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pripc.c (2072B)

      1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 /*
      7 * File: pripc.c
      8 *
      9 * Description: functions for IPC support
     10 */
     11 
     12 #include "primpl.h"
     13 
     14 #include <string.h>
     15 
     16 /*
     17 * A POSIX IPC name must begin with a '/'.
     18 * A POSIX IPC name on Solaris cannot contain any '/' except
     19 * the required leading '/'.
     20 * A POSIX IPC name on HP-UX must be a valid pathname
     21 * in the file system.
     22 *
     23 * The ftok() function for System V IPC requires a valid pathname
     24 * in the file system.
     25 *
     26 * A Win32 IPC name cannot contain '\'.
     27 */
     28 
     29 static void _pr_ConvertSemName(char* result) {
     30 #ifdef _PR_HAVE_POSIX_SEMAPHORES
     31 #  if defined(SOLARIS)
     32  char* p;
     33 
     34  /* Convert '/' to '_' except for the leading '/' */
     35  for (p = result + 1; *p; p++) {
     36    if (*p == '/') {
     37      *p = '_';
     38    }
     39  }
     40  return;
     41 #  else
     42  return;
     43 #  endif
     44 #elif defined(_PR_HAVE_SYSV_SEMAPHORES)
     45  return;
     46 #elif defined(WIN32)
     47  return;
     48 #endif
     49 }
     50 
     51 static void _pr_ConvertShmName(char* result) {
     52 #if defined(PR_HAVE_POSIX_NAMED_SHARED_MEMORY)
     53 #  if defined(SOLARIS)
     54  char* p;
     55 
     56  /* Convert '/' to '_' except for the leading '/' */
     57  for (p = result + 1; *p; p++) {
     58    if (*p == '/') {
     59      *p = '_';
     60    }
     61  }
     62  return;
     63 #  else
     64  return;
     65 #  endif
     66 #elif defined(PR_HAVE_SYSV_NAMED_SHARED_MEMORY)
     67  return;
     68 #elif defined(WIN32)
     69  return;
     70 #else
     71  return;
     72 #endif
     73 }
     74 
     75 PRStatus _PR_MakeNativeIPCName(const char* name, char* result, PRIntn size,
     76                               _PRIPCType type) {
     77  if (strlen(name) >= (PRSize)size) {
     78    PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
     79    return PR_FAILURE;
     80  }
     81  strcpy(result, name);
     82  switch (type) {
     83    case _PRIPCSem:
     84      _pr_ConvertSemName(result);
     85      break;
     86    case _PRIPCShm:
     87      _pr_ConvertShmName(result);
     88      break;
     89    default:
     90      PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
     91      return PR_FAILURE;
     92  }
     93  return PR_SUCCESS;
     94 }