posix/tst-execvp2.c

   1 #include <errno.h>
   2 #include <libgen.h>
   3 #undef basename
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8 #include <sys/stat.h>
   9
  10
  11 static void prepare (int argc, char *argv[]);
  12 static int do_test (void);
  13 #define PREPARE(argc, argv) prepare (argc, argv)
  14 #define TEST_FUNCTION do_test ()
  15 #include "../test-skeleton.c"
  16
  17
  18 static char *copy;
  19
  20 static void
  21 prepare (int argc, char *argv[])
  22 {
  23   char *buf;
  24   int off;
  25   asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
  26   if (buf == NULL)
  27     {
  28       puts ("asprintf  failed");
  29       exit (1);
  30     }
  31   if (system (buf) != 0)
  32     {
  33       puts ("system  failed");
  34       exit (1);
  35     }
  36
  37   /* Make it not executable.  */
  38   copy = buf + off;
  39   if (chmod (copy, 0666) != 0)
  40     {
  41       puts ("chmod  failed");
  42       exit (1);
  43     }
  44
  45   add_temp_file (copy);
  46 }
  47
  48
  49 static int
  50 do_test (void)
  51 {
  52   /* Make sure we do not find a binary with the name we are going to
  53      use.  */
  54   char *bindir = strdupa (copy);
  55   bindir = canonicalize_file_name (dirname (bindir));
  56   if (bindir == NULL)
  57     {
  58       puts ("canonicalize_file_name failed");
  59       return 1;
  60     }
  61   char *path;
  62   asprintf (&path, "%s:../libio:../elf", bindir);
  63   if (path == NULL)
  64     {
  65       puts ("asprintf  failed");
  66       return 1;
  67     }
  68
  69   setenv ("PATH", path, 1);
  70
  71   char *argv[] = { basename (copy), NULL };
  72   errno = 0;
  73   execvp (argv[0], argv);
  74
  75   if (errno != EACCES)
  76     {
  77       printf ("errno = %d (%m), expected EACCES\n", errno);
  78       return 1;
  79     }
  80
  81   return 0;
  82 }