src/tools/fs_shell/fs_shell_command_unix.cpp

   1 /*
   2  * Copyright 2005-2010, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <errno.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11
  12 #include "fs_shell_command.h"
  13
  14
  15 bool gUsesFifos = true;
  16
  17
  18 bool
  19 send_external_command(const char* command, int* result)
  20 {
  21         // open the pipe to the FS shell
  22         FILE* out = fdopen(4, "w");
  23         if (out == NULL) {
  24                 fprintf(stderr, "Error: Failed to open command output: %s\n",
  25                         strerror(errno));
  26                 return false;
  27         }
  28
  29         // open the pipe from the FS shell
  30         FILE* in = fdopen(3, "r");
  31         if (in == NULL) {
  32                 fprintf(stderr, "Error: Failed to open command reply input: %s\n",
  33                         strerror(errno));
  34                 return false;
  35         }
  36
  37         // write the command
  38         if (fputs(command, out) == EOF || fputc('\n', out) == EOF
  39                 || fflush(out) == EOF) {
  40                 fprintf(stderr, "Error: Failed to write command to FS shell: %s\n",
  41                         strerror(errno));
  42                 return false;
  43         }
  44
  45         // read the reply
  46         char buffer[16];
  47         if (fgets(buffer, sizeof(buffer), in) == NULL) {
  48                 fprintf(stderr, "Error: Failed to get command reply: %s\n",
  49                         strerror(errno));
  50                 return false;
  51         }
  52
  53         // parse the number
  54         char* end;
  55         *result = strtol(buffer, &end, 10);
  56         if (end == buffer) {
  57                 fprintf(stderr, "Error: Read non-number command reply from FS shell: "
  58                         "\"%s\"\n", buffer);
  59                 return false;
  60         }
  61
  62         return true;
  63 }
  64