Little script to make all the files under a certain directory safe on OS X.

removexattr.c

/***********************************************************************
 * Little script to make all the files under a certain directory safe. *
 * Works only on Mac OS X. Tested on 10.5 and 10.6                     *
 *                                                                     *
 * Written by bojo (Bo Johansson) in a comment on Mac OS X Hint:       *
 * http://hints.macworld.com/article.php?story=20071029151619619       *
 ***********************************************************************/

/* Compile by
 * gcc -O2 -Wall removexattr.c -o removexattr
 *
 * Run it on a file or a directory (it traverses down a directory)
 * Example: ./removexattr Downloads
 * will strip everything in the directory Downloads of the quarantine attribute.
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <sys/errno.h>
#include <sys/xattr.h>
#include <ctype.h>
#include <limits.h>


static void traverse_tree(const char * path);

/* You can add more attributes below if you want to */
static const char * const xattr_list[] = {
	  "com.apple.quarantine",
	  /* "com.apple.FinderInfo",*/
	  NULL
	};

static __inline__ void remove_xr(const char * path)
{
  int i = 0;

  for(i = 0; xattr_list[i]; i++) {
	 if(getxattr(path, xattr_list[i], NULL, 0, 0, XATTR_NOFOLLOW) > 0)
		removexattr(path, xattr_list[i], XATTR_NOFOLLOW);
  }
}

int main(int argc, char ** argv)
{
	struct stat stbuf;
	int i;

   if(argc < 2) {
	  fprintf(stderr, "Usage: %s <file || directory ...>\n", argv[0]);
      exit(1);
   }
	
	for(i = 1; i < argc; i++) {
	  if(stat(argv[i], &stbuf)) {
		 perror(argv[i]);
		 continue;
	  }
	  if(S_ISREG(stbuf.st_mode))
		 remove_xr(argv[i]);
	  else if(S_ISDIR(stbuf.st_mode))
		 traverse_tree(argv[i]);
	}

	return(0);
}

#define BUFSIZE (PATH_MAX + 1)

static void traverse_tree(const char * path)
{
  DIR * dirp;
  struct dirent * dp;
  char * npath = NULL;

  if((dirp = opendir(path)) == NULL) {
	 perror(path);
	 return;
  }

  if(!(npath = malloc(BUFSIZE * sizeof(char)))) {
	 perror("malloc");
	 exit(EXIT_FAILURE);
  }
  while((dp = readdir(dirp))) {
	 if(!((dp->d_name[0] == '.' && dp->d_name[1] == '\0') ||
			(dp->d_name[0] == '.' && dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) {
		snprintf(npath,  BUFSIZE, "%s/%s", path, dp->d_name);
		remove_xr(npath);
		if(dp->d_type == DT_DIR) {
		  traverse_tree(npath);
		}
	 }
  }
  closedir(dirp);
  free(npath);
}