pico/osdep/popen.c

   1 #if !defined(lint) && !defined(DOS)
   2 static char rcsid[] = "$Id: popen.c 761 2007-10-23 22:35:18Z hubert@u.washington.edu $";
   3 #endif
   4
   5 /*
   6  * ========================================================================
   7  * Copyright 2006 University of Washington
   8  *
   9  * Licensed under the Apache License, Version 2.0 (the "License");
  10  * you may not use this file except in compliance with the License.
  11  * You may obtain a copy of the License at
  12  *
  13  *     http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * ========================================================================
  16  */
  17
  18 #include <system.h>
  19 #include <general.h>
  20 #include "../estruct.h"
  21
  22
  23
  24
  25 /*
  26  * P_open - run the given command in a sub-shell returning a file pointer
  27  *          from which to read the output
  28  *
  29  * note:
  30  *      For OS's other than unix, you will have to rewrite this function.
  31  *      Hopefully it'll be easy to exec the command into a temporary file,
  32  *      and return a file pointer to that opened file or something.
  33  */
  34 int
  35 P_open(char *s)
  36 {
  37 #if     HAVE_POPEN
  38     extern FIOINFO g_pico_fio;
  39
  40     g_pico_fio.flags = FIOINFO_READ;
  41     g_pico_fio.name = "pipe";
  42
  43     if((g_pico_fio.fp = popen(s, "r")) != NULL)
  44       return(FIOSUC);
  45
  46     return(FIOERR);
  47 #else
  48     /* Windows never did this, but piping has been done elsewhere */
  49     return(0);
  50 #endif
  51 }
  52
  53
  54
  55 /*
  56  * P_close - close the given descriptor
  57  *
  58  */
  59 void
  60 P_close(void)
  61 {
  62 #if     HAVE_PCLOSE
  63     extern FIOINFO g_pico_fio;
  64
  65     if(g_pico_fio.fp)
  66       (void) pclose(g_pico_fio.fp);
  67 #endif
  68 }