posix/tst-execvpe6.c

   1 /* Check execvpe script argument handling.
   2    Copyright (C) 2016-2019 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23 #include <sys/stat.h>
  24 #include <sys/param.h>
  25
  26 static char *fname1;
  27 static char *fname2;
  28 static char *logname;
  29
  30 static void do_prepare (void);
  31 #define PREPARE(argc, argv) do_prepare ()
  32 static int do_test (void);
  33 #define TEST_FUNCTION do_test ()
  34
  35 #include "../test-skeleton.c"
  36
  37 static void
  38 do_prepare (void)
  39 {
  40   int logfd = create_temp_file ("logfile", &logname);
  41   close (logfd);
  42
  43   int fd1 = create_temp_file ("testscript", &fname1);
  44   dprintf (fd1, "echo foo $1 $2 $3 > %s\n", logname);
  45   fchmod (fd1, 0700);
  46   close (fd1);
  47
  48   int fd2 = create_temp_file ("testscript", &fname2);
  49   dprintf (fd2, "echo foo > %s\n", logname);
  50   fchmod (fd2, 0700);
  51   close (fd2);
  52 }
  53
  54 static int
  55 run_script (const char *fname, char *args[])
  56 {
  57   /* We want to test the `execvpe' function.  To do this we restart the
  58      program with an additional parameter.  */
  59   int status;
  60   pid_t pid = fork ();
  61   if (pid == 0)
  62     {
  63       execvpe (fname, args, NULL);
  64
  65       puts ("Cannot exec");
  66       exit (EXIT_FAILURE);
  67     }
  68   else if (pid == (pid_t) -1)
  69     {
  70       puts ("Cannot fork");
  71       return 1;
  72     }
  73
  74   /* Wait for the child.  */
  75   if (waitpid (pid, &status, 0) != pid)
  76     {
  77       puts ("Wrong child");
  78       return 1;
  79     }
  80
  81   if (WTERMSIG (status) != 0)
  82     {
  83       puts ("Child terminated incorrectly");
  84       return 1;
  85     }
  86
  87   return 0;
  88 }
  89
  90 static int
  91 check_output (const char *expected)
  92 {
  93   /* Check log output.  */
  94   FILE *arq = fopen (logname, "r");
  95   if (arq == NULL)
  96     {
  97       puts ("Error opening output file");
  98       return 1;
  99     }
 100
 101   char line[128];
 102   if (fgets (line, sizeof (line), arq) == NULL)
 103     {
 104       puts ("Error reading output file");
 105       return 1;
 106     }
 107   fclose (arq);
 108
 109   if (strcmp (line, expected) != 0)
 110     {
 111       puts ("Output file different than expected");
 112       return 1;
 113     }
 114
 115   return 0;
 116 }
 117
 118 static int
 119 do_test (void)
 120 {
 121   if  (setenv ("PATH", test_dir, 1) != 0)
 122     {
 123       puts ("setenv failed");
 124       return 1;
 125     }
 126
 127   /* First check resulting script run with some arguments results in correct
 128      output file.  */
 129   char *args1[] = { fname1, (char*) "1", (char *) "2", (char *) "3", NULL };
 130   if (run_script (fname1,args1))
 131     return 1;
 132   if (check_output ("foo 1 2 3\n"))
 133     return 1;
 134
 135   /* Same as before but with an expected empty argument list.  */
 136   char *args2[] = { fname2, NULL };
 137   if (run_script (fname2, args2))
 138     return 1;
 139   if (check_output ("foo\n"))
 140     return 1;
 141
 142   /* Same as before but with an empty argument list.  */
 143   char *args3[] = { NULL };
 144   if (run_script (fname2, args3))
 145     return 1;
 146   if (check_output ("foo\n"))
 147     return 1;
 148
 149   return 0;
 150 }