none/tests/solaris/proc_aout.c

   1 /* Test whether /proc/{self,$PID}/path/a.out is correctly simulated. */
   2
   3 #include <limits.h>
   4 #include <stdio.h>
   5 #include <strings.h>
   6 #include <unistd.h>
   7 #include <sys/fcntl.h>
   8
   9 static void test_readlink(const char *cwd, const char *label,
  10       const char *path)
  11 {
  12    char buf[PATH_MAX];
  13    int n;
  14
  15    if ((n = readlink(path, buf, sizeof(buf) - 1)) >= 0) {
  16       const char *p;
  17       size_t len = strlen(cwd);
  18
  19       buf[n] = '\0';
  20
  21       p = buf;
  22       if (!strncmp(buf, cwd, len))
  23          p += len;
  24       printf("Result of readlink(\"%s\"): %s\n", label, p);
  25    }
  26    else
  27       perror("readlink");
  28 }
  29
  30 static void test_readlinkat(const char *cwd, const char *label,
  31       const char *path)
  32 {
  33    char buf[PATH_MAX];
  34    int n;
  35
  36    if ((n = readlinkat(AT_FDCWD, path, buf, sizeof(buf) - 1)) >= 0) {
  37       const char *p;
  38       size_t len = strlen(cwd);
  39
  40       buf[n] = '\0';
  41
  42       p = buf;
  43       if (!strncmp(buf, cwd, len))
  44          p += len;
  45       printf("Result of readlinkat(\"%s\"): %s\n", label, p);
  46    }
  47    else
  48       perror("readlinkat");
  49 }
  50
  51 int main(void)
  52 {
  53    char cwd[PATH_MAX];
  54    char path[PATH_MAX];
  55
  56    cwd[0] = '\0';
  57    if (!getcwd(cwd, sizeof(cwd) - 1)) /* '-1' to make room for '/' */
  58       perror("getcwd");
  59    strcat(cwd, "/");
  60
  61    snprintf(path, sizeof(path), "/proc/%ld/path/a.out", (long)getpid());
  62
  63    test_readlink(cwd, "/proc/self/path/a.out", "/proc/self/path/a.out");
  64    test_readlink(cwd, "/proc/<pid>/path/a.out", path);
  65
  66    test_readlinkat(cwd, "/proc/self/path/a.out", "/proc/self/path/a.out");
  67    test_readlinkat(cwd, "/proc/<pid>/path/a.out", path);
  68
  69    return 0;
  70 }
  71