memcheck/tests/freebsd/linkat.c

   1 /*
   2  * Test this family of functions
   3  * linkat, unlinkat, symlinkat
   4  *
   5  * and whilst we have an open filehandle, gratuitously test
   6  * fdatasync
   7  */
   8
   9 #include <unistd.h>
  10 #include <dirent.h>
  11 #include <string.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include "../../../config.h"
  15
  16 int main(void)
  17 {
  18     char buff[64];
  19     char tmpfromfile[] = "/tmp/testlinkat1.XXXXXX";
  20     char tmptolink[] = "/tmp/testlinkat2.XXXXXX";
  21     char tmptosymlink[] = "/tmp/testlinkat3.XXXXXX";
  22     int tmpfd = mkstemp(tmpfromfile);
  23     mktemp(tmptolink);
  24
  25     memset(buff, 0, sizeof(buff));
  26     sprintf(buff, "some data");
  27     write(tmpfd, buff, strlen(buff)+1);
  28 #if defined(HAVE_FDATASYNC)
  29     fdatasync(tmpfd);
  30 #endif
  31     close (tmpfd);
  32
  33     DIR* tmpdir = opendir("/tmp");
  34     if (tmpdir) {
  35         int tmpdirfd = dirfd(tmpdir);
  36
  37         const char* from = tmpfromfile+5;
  38         const char* to = tmptolink+5;
  39         const char* tosym = tmptosymlink+5;
  40
  41         if (-1 == linkat(tmpdirfd, from, tmpdirfd, to, 0)) {
  42             perror("linkat failed");
  43         }
  44
  45         unlinkat(tmpdirfd, to, 0);
  46
  47         if (-1 == symlinkat(from, tmpdirfd, tosym)) {
  48             perror("symlinkat failed");
  49         }
  50
  51         unlinkat(tmpdirfd, tosym, 0);
  52
  53         // now some errors
  54         char* badstring = strdup(from);
  55         free(badstring);
  56         linkat(tmpdirfd, badstring, tmpdirfd, to, 0);
  57         symlinkat(badstring, tmpdirfd, tosym);
  58         unlinkat(tmpdirfd, to, 0);
  59         unlinkat(tmpdirfd, tosym, 0);
  60
  61         badstring = strdup(to);
  62         free(badstring);
  63         linkat(tmpdirfd, from, tmpdirfd, badstring, 0);
  64         unlinkat(tmpdirfd, badstring, 0);
  65
  66         badstring = strdup(tosym);
  67         free(badstring);
  68         symlinkat(from, tmpdirfd, badstring);
  69         unlinkat(tmpdirfd, badstring, 0);
  70
  71         int uninit;
  72         linkat(uninit, from, uninit, to, uninit);
  73         symlinkat(from, uninit, tosym);
  74         unlinkat(uninit, "dontcare", uninit);
  75
  76         closedir(tmpdir);
  77     }
  78
  79     unlink(tmpfromfile);
  80     int badint;
  81 #if defined(HAVE_FDATASYNC)
  82     fdatasync(badint);
  83 #endif
  84 }
  85