Line data    Source code

       1             : /*
       2             :  *
       3             :  * Copyright 2015, Google Inc.
       4             :  * All rights reserved.
       5             :  *
       6             :  * Redistribution and use in source and binary forms, with or without
       7             :  * modification, are permitted provided that the following conditions are
       8             :  * met:
       9             :  *
      10             :  *     * Redistributions of source code must retain the above copyright
      11             :  * notice, this list of conditions and the following disclaimer.
      12             :  *     * Redistributions in binary form must reproduce the above
      13             :  * copyright notice, this list of conditions and the following disclaimer
      14             :  * in the documentation and/or other materials provided with the
      15             :  * distribution.
      16             :  *     * Neither the name of Google Inc. nor the names of its
      17             :  * contributors may be used to endorse or promote products derived from
      18             :  * this software without specific prior written permission.
      19             :  *
      20             :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      21             :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      22             :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      23             :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      24             :  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      25             :  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      26             :  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      27             :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      28             :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      29             :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      30             :  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      31             :  *
      32             :  */
      33             : 
      34             : #include <grpc/support/port_platform.h>
      35             : 
      36             : #ifdef GPR_POSIX_FILE
      37             : 
      38             : #include "src/core/support/file.h"
      39             : 
      40             : #include <errno.h>
      41             : #include <stdlib.h>
      42             : #include <string.h>
      43             : #include <unistd.h>
      44             : 
      45             : #include <grpc/support/alloc.h>
      46             : #include <grpc/support/log.h>
      47             : #include <grpc/support/string_util.h>
      48             : 
      49             : #include "src/core/support/string.h"
      50             : 
      51         101 : FILE *gpr_tmpfile(const char *prefix, char **tmp_filename) {
      52         101 :   FILE *result = NULL;
      53             :   char *template;
      54             :   int fd;
      55             : 
      56         101 :   if (tmp_filename != NULL) *tmp_filename = NULL;
      57             : 
      58         101 :   gpr_asprintf(&template, "/tmp/%s_XXXXXX", prefix);
      59         101 :   GPR_ASSERT(template != NULL);
      60             : 
      61         101 :   fd = mkstemp(template);
      62         101 :   if (fd == -1) {
      63           0 :     gpr_log(GPR_ERROR, "mkstemp failed for template %s with error %s.",
      64           0 :             template, strerror(errno));
      65           0 :     goto end;
      66             :   }
      67         101 :   result = fdopen(fd, "w+");
      68         101 :   if (result == NULL) {
      69           0 :     gpr_log(GPR_ERROR, "Could not open file %s from fd %d (error = %s).",
      70           0 :             template, fd, strerror(errno));
      71           0 :     unlink(template);
      72           0 :     close(fd);
      73           0 :     goto end;
      74             :   }
      75             : 
      76             : end:
      77         101 :   if (result != NULL && tmp_filename != NULL) {
      78         101 :     *tmp_filename = template;
      79             :   } else {
      80           0 :     gpr_free(template);
      81             :   }
      82         101 :   return result;
      83             : }
      84             : 
      85             : #endif /* GPR_POSIX_FILE */