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 #ifndef EXECVP
  18 # define EXECVP(file, argv)  execvp (file, argv)
  19 #endif
  20
  21 static char *copy;
  22
  23 static void
  24 prepare (int argc, char *argv[])
  25 {
  26   char *buf;
  27   int off;
  28
  29   buf = xasprintf ("cp %s %n%s-copy", argv[0], &off, argv[0]);
  30   if (system (buf) != 0)
  31     {
  32       puts ("system  failed");
  33       exit (1);
  34     }
  35
  36   /* Make it not executable.  */
  37   copy = buf + off;
  38   if (chmod (copy, 0666) != 0)
  39     {
  40       puts ("chmod  failed");
  41       exit (1);
  42     }
  43
  44   add_temp_file (copy);
  45 }
  46
  47
  48 static int
  49 do_test (void)
  50 {
  51   /* Make sure we do not find a binary with the name we are going to
  52      use.  */
  53   char *bindir = strdupa (copy);
  54   bindir = canonicalize_file_name (dirname (bindir));
  55   if (bindir == NULL)
  56     {
  57       puts ("canonicalize_file_name failed");
  58       return 1;
  59     }
  60
  61   char *path = xasprintf ("%s:../libio:../elf", bindir);
  62
  63   setenv ("PATH", path, 1);
  64
  65   char *argv[] = { basename (copy), NULL };
  66   errno = 0;
  67   EXECVP (argv[0], argv);
  68
  69   if (errno != EACCES)
  70     {
  71       printf ("errno = %d (%m), expected EACCES\n", errno);
  72       return 1;
  73     }
  74
  75   return 0;
  76 }