findbroken.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <stdlib.h>
   4 #include <dirent.h>
   5 #include <sys/stat.h>
   6
   7
   8 static void findit(char *dir)
   9 {
  10         DIR *d;
  11         struct dirent *de;
  12
  13         d = opendir(dir);
  14         if (!d) return;
  15
  16
  17         while ((de = readdir(d))) {
  18                 char *fname;
  19                 struct stat st, st2;
  20
  21                 if (strcmp(de->d_name,".")==0) continue;
  22                 if (strcmp(de->d_name,"..")==0) continue;
  23
  24                 fname = (char *)malloc(strlen(dir) + strlen(de->d_name) + 2);
  25                 if (!fname) {
  26                         fprintf(stderr,"out of memory\n");
  27                         exit(1);
  28                 }
  29                 sprintf(fname,"%s/%s", dir, de->d_name);
  30
  31                 if (lstat(fname, &st)) {
  32                         perror(fname);
  33                         continue;
  34                 }
  35
  36                 if (S_ISLNK(st.st_mode) &&
  37                     (stat(fname,&st2) || st2.st_uid != st.st_uid)) {
  38                         char buf[1024];
  39                         readlink(fname, buf, sizeof(buf)-1);
  40                         printf("%s -> %s\n", fname, buf);
  41                 }
  42
  43                 if (S_ISDIR(st.st_mode)) {
  44                         findit(fname);
  45                 }
  46
  47                 free(fname);
  48         }
  49
  50         closedir(d);
  51 }
  52
  53
  54 int main(int argc, char *argv[])
  55 {
  56         int size;
  57
  58         if (argc < 2) {
  59                 fprintf(stderr,"%s: <dir>\n", argv[0]);
  60                 exit(1);
  61         }
  62
  63         findit(argv[1]);
  64         return 0;
  65 }