Remove extra extended attributes

remove_xattr.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/xattr.h>

char const* kPatterns[] = {
    "com.apple.quarantine", "com.apple.lastuseddate#PS",
    "com.apple.metadata:kMDItemWhereFroms",
    "com.apple.metadata:_kMDItemUserTags",
    "com.apple.metadata:kMDLabel_nhfihrek4vfesitn3irk5qye5q"};

int main(int args, char** argv) {
  if (args != 2) {
    fprintf(stderr, "Usage: %s <file>\n", argv[0]);
    exit(1);
  }
  int const kOptions = XATTR_NOFOLLOW;
  char* filename = argv[1];
  int size = listxattr(filename, NULL, 0, kOptions);
  if (size == -1) {
    perror("Getting size of attributes");
    exit(1);
  }
  char* name_buffer = (char*)calloc(size, 1);
  listxattr(filename, name_buffer, size, kOptions);
  if (size == -1) {
    perror("Listing attributes");
    free(name_buffer);
    exit(1);
  }
  int pos = 0;
  while (pos < size) {
    char* attribute = name_buffer + pos;
    int match = 0;
    for (int i = 0; i < sizeof(kPatterns) / sizeof(char const*); ++i) {
      if (strcmp(attribute, kPatterns[i]) == 0) {
        match = 1;
        break;
      }
    }
    if (match) {
      int ret = removexattr(filename, attribute, kOptions);
      if (ret == -1) {
        perror("Removing attributes");
        free(name_buffer);
        exit(1);
      }
      printf("Removed attribute \"%s\" from \"%s\".\n", attribute, filename);
    } else {
      printf("Not removing attribute \"%s\" from \"%s\".\n", attribute,
             filename);
    }
    pos += strlen(attribute) + 1;
  }
  free(name_buffer);
  return 0;
}