nsprpub/pr/src/misc/pripc.c

   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 {
  31 #ifdef _PR_HAVE_POSIX_SEMAPHORES
  32 #if defined(SOLARIS)
  33     char *p;
  34
  35     /* Convert '/' to '_' except for the leading '/' */
  36     for (p = result+1; *p; p++) {
  37         if (*p == '/') {
  38             *p = '_';
  39         }
  40     }
  41     return;
  42 #else
  43     return;
  44 #endif
  45 #elif defined(_PR_HAVE_SYSV_SEMAPHORES)
  46     return;
  47 #elif defined(WIN32)
  48     return;
  49 #endif
  50 }
  51
  52 static void _pr_ConvertShmName(char *result)
  53 {
  54 #if defined(PR_HAVE_POSIX_NAMED_SHARED_MEMORY)
  55 #if defined(SOLARIS)
  56     char *p;
  57
  58     /* Convert '/' to '_' except for the leading '/' */
  59     for (p = result+1; *p; p++) {
  60         if (*p == '/') {
  61             *p = '_';
  62         }
  63     }
  64     return;
  65 #else
  66     return;
  67 #endif
  68 #elif defined(PR_HAVE_SYSV_NAMED_SHARED_MEMORY)
  69     return;
  70 #elif defined(WIN32)
  71     return;
  72 #else
  73     return;
  74 #endif
  75 }
  76
  77 PRStatus _PR_MakeNativeIPCName(
  78     const char *name,
  79     char *result,
  80     PRIntn size,
  81     _PRIPCType type)
  82 {
  83     if (strlen(name) >= (PRSize)size) {
  84         PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
  85         return PR_FAILURE;
  86     }
  87     strcpy(result, name);
  88     switch (type) {
  89         case _PRIPCSem:
  90             _pr_ConvertSemName(result);
  91             break;
  92         case _PRIPCShm:
  93             _pr_ConvertShmName(result);
  94             break;
  95         default:
  96             PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
  97             return PR_FAILURE;
  98     }
  99     return PR_SUCCESS;
 100 }