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   asprintf (&buf, "cp %s %n%s-copy", argv[0], &off, argv[0]);
  29   if (buf == NULL)
  30     {
  31       puts ("asprintf  failed");
  32       exit (1);
  33     }
  34   if (system (buf) != 0)
  35     {
  36       puts ("system  failed");
  37       exit (1);
  38     }
  39
  40   /* Make it not executable.  */
  41   copy = buf + off;
  42   if (chmod (copy, 0666) != 0)
  43     {
  44       puts ("chmod  failed");
  45       exit (1);
  46     }
  47
  48   add_temp_file (copy);
  49 }
  50
  51
  52 static int
  53 do_test (void)
  54 {
  55   /* Make sure we do not find a binary with the name we are going to
  56      use.  */
  57   char *bindir = strdupa (copy);
  58   bindir = canonicalize_file_name (dirname (bindir));
  59   if (bindir == NULL)
  60     {
  61       puts ("canonicalize_file_name failed");
  62       return 1;
  63     }
  64   char *path;
  65   asprintf (&path, "%s:../libio:../elf", bindir);
  66   if (path == NULL)
  67     {
  68       puts ("asprintf  failed");
  69       return 1;
  70     }
  71
  72   setenv ("PATH", path, 1);
  73
  74   char *argv[] = { basename (copy), NULL };
  75   errno = 0;
  76   EXECVP (argv[0], argv);
  77
  78   if (errno != EACCES)
  79     {
  80       printf ("errno = %d (%m), expected EACCES\n", errno);
  81       return 1;
  82     }
  83
  84   return 0;
  85 }