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// on macOS, there's an "xattr" command line app, written in Python, and | ||
// it's hella slow to do this to remove the Apple quarantine flag... | ||
// | ||
// find . -exec xattr -d com.apple.quarantine {} \; | ||
// | ||
// ...since you end up loading and unloading the Python interpreter for every | ||
// file and directory. | ||
// | ||
// So this is a simple C app to walk a directory tree, blowing away a specific | ||
// extended attribute. This takes a fraction of a second where the "find" | ||
// command above can take tens of minutes. | ||
// | ||
// This code is public domain. Use however you like. --ryan. | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <dirent.h> | ||
#include <sys/types.h> | ||
#include <sys/xattr.h> | ||
#include <sys/stat.h> | ||
#include <errno.h> | ||
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static int walktree(const char *xattr, const char *tree) | ||
{ | ||
int retval = 0; | ||
struct stat statbuf; | ||
if (stat(tree, &statbuf) == -1) { | ||
fprintf(stderr, "Couldn't stat '%s': %s\n", tree, strerror(errno)); | ||
return -1; | ||
} | ||
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if (S_ISDIR(statbuf.st_mode)) { | ||
const size_t treelen = strlen(tree); | ||
DIR *dirp = opendir(tree); | ||
struct dirent *dent; | ||
if (dirp == NULL) { | ||
fprintf(stderr, "Couldn't opendir '%s': %s\n", tree, strerror(errno)); | ||
retval = -1; | ||
} else { | ||
while ((dent = readdir(dirp)) != NULL) { | ||
const char *name = dent->d_name; | ||
if ( (strcmp(name, ".") != 0) && (strcmp(name, "..") != 0)) { | ||
const size_t childlen = treelen + strlen(name) + 2; | ||
char *child = (char *) malloc(childlen); | ||
if (child == NULL) { | ||
fprintf(stderr, "Out of memory!\n"); | ||
exit(-1); | ||
} | ||
snprintf(child, childlen, "%s/%s", tree, name); | ||
if (walktree(xattr, child) == -1) { | ||
retval = -1; | ||
} | ||
free(child); | ||
} | ||
} | ||
closedir(dirp); | ||
} | ||
} | ||
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#ifdef __linux__ | ||
if (lremovexattr(tree, xattr) == -1) | ||
#else | ||
if (removexattr(tree, xattr, XATTR_NOFOLLOW) == -1) | ||
#endif | ||
{ | ||
if (errno != ENOATTR) { | ||
fprintf(stderr, "Couldn't remove attribute '%s' from '%s': %s\n", xattr, tree, strerror(errno)); | ||
retval = -1; | ||
} | ||
} | ||
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return retval; | ||
} | ||
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int main(int argc, char **argv) | ||
{ | ||
const char *xattr = argv[1]; | ||
int retval = 0; | ||
int i; | ||
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if (argc < 3) { | ||
fprintf(stderr, | ||
"\n" | ||
"USAGE: %s <xattrname> <path1> ... <pathN>\n" | ||
"\n" | ||
" Paths can be files, or directories that will be walked.\n" | ||
"\n", argv[0]); | ||
return 2; | ||
} | ||
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for (i = 2; i < argc; i++) { | ||
if (walktree(xattr, argv[i]) < 0) { | ||
retval = 1; | ||
} | ||
} | ||
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return retval; | ||
} | ||
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// end of rmxattr.c ... |