2 * $Id: mangle.c,v 1.9 2002-08-14 17:49:13 jmarcus Exp $
4 * Copyright (c) 2002. Joe Marcus Clarke (marcus@marcuscom.com)
5 * All Rights Reserved. See COPYRIGHT.
7 * mangle, demangle (filename):
8 * mangle or demangle filenames if they are greater than the max allowed
9 * characters for a given version of AFP.
14 #endif /* HAVE_CONFIG_H */
20 demangle(const struct vol *vol, char *mfilename) {
21 char *filename = NULL;
26 /* Is this really a mangled file? */
27 mangle = strstr(mfilename, MANGLE_CHAR);
29 LOG(log_debug, logtype_default, "demangle: %s is not a mangled filename", mfilename);
33 if ((ext = strrchr(mfilename, '.')) != NULL) {
34 ext_len = strlen(ext);
36 if (strlen(mangle) != strlen(MANGLE_CHAR) + MANGLE_LENGTH + ext_len) {
37 LOG(log_error, logtype_default, "demangle: %s is not long enough to be a mangled filename", mfilename);
41 filename = cnid_mangle_get(vol->v_db, mfilename);
43 /* No unmangled filename was found. */
44 if (filename == NULL) {
45 LOG(log_error, logtype_default, "demangle: Unable to lookup %s in the mangle database", mfilename);
53 mangle(const struct vol *vol, char *filename) {
57 static char mfilename[MAX_LENGTH + 1];
58 char mangle_suffix[MANGLE_LENGTH + 1];
60 int mangle_suffix_int = 0;
62 /* Do we really need to mangle this filename? */
63 if (strlen(filename) <= MAX_LENGTH) {
67 /* First, attmept to locate a file extension. */
68 if ((ext = strrchr(filename, '.')) != NULL) {
69 ext_len = strlen(ext);
70 if (ext_len > MAX_EXT_LENGTH) {
71 /* Do some bounds checking to prevent an extension overflow. */
72 ext_len = MAX_EXT_LENGTH;
76 /* Check to see if we already have a mangled filename by this name. */
79 strncpy(m, filename, MAX_LENGTH - strlen(MANGLE_CHAR) - MANGLE_LENGTH - ext_len);
80 m[MAX_LENGTH - strlen(MANGLE_CHAR) - MANGLE_LENGTH - ext_len] = '\0';
82 strcat(m, MANGLE_CHAR);
83 (void)sprintf(mangle_suffix, "%03d", mangle_suffix_int);
84 strcat(m, mangle_suffix);
87 strncat(m, ext, ext_len);
90 tf = cnid_mangle_get(vol->v_db, m);
91 if (tf == NULL || (strcmp(tf, filename)) == 0) {
95 if (++mangle_suffix_int > MAX_MANGLE_SUFFIX_LENGTH) {
96 LOG(log_error, logtype_default, "mangle: Failed to find a free mangle suffix; returning original filename");
102 if (cnid_mangle_add(vol->v_db, m, filename) < 0) {
108 #endif /* FILE_MANGLING */