2 * $Id: mangle.c,v 1.12 2002-10-17 18:01:54 didg 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);
32 if ((ext = strrchr(mfilename, '.')) != NULL) {
33 ext_len = strlen(ext);
35 if (strlen(mangle) != strlen(MANGLE_CHAR) + MANGLE_LENGTH + ext_len) {
36 LOG(log_error, logtype_afpd, "demangle: %s is not long enough to be a mangled filename", mfilename);
40 filename = cnid_mangle_get(vol->v_db, mfilename);
42 /* No unmangled filename was found. */
43 if (filename == NULL) {
44 LOG(log_error, logtype_afpd, "demangle: Unable to lookup %s in the mangle database", mfilename);
52 mangle(const struct vol *vol, char *filename) {
56 static char mfilename[MAX_LENGTH + 1];
57 char mangle_suffix[MANGLE_LENGTH + 1];
59 int mangle_suffix_int = 0;
61 /* Do we really need to mangle this filename? */
62 if (strlen(filename) <= vol->max_filename) {
66 /* First, attmept to locate a file extension. */
67 if ((ext = strrchr(filename, '.')) != NULL) {
68 ext_len = strlen(ext);
69 if (ext_len > MAX_EXT_LENGTH) {
70 /* Do some bounds checking to prevent an extension overflow. */
71 ext_len = MAX_EXT_LENGTH;
75 /* Check to see if we already have a mangled filename by this name. */
78 strncpy(m, filename, MAX_LENGTH - strlen(MANGLE_CHAR) - MANGLE_LENGTH - ext_len);
79 m[MAX_LENGTH - strlen(MANGLE_CHAR) - MANGLE_LENGTH - ext_len] = '\0';
81 strcat(m, MANGLE_CHAR);
82 (void)sprintf(mangle_suffix, "%03d", mangle_suffix_int);
83 strcat(m, mangle_suffix);
86 strncat(m, ext, ext_len);
89 tf = cnid_mangle_get(vol->v_db, m);
90 if (tf == NULL || (strcmp(tf, filename)) == 0) {
94 if (++mangle_suffix_int > MAX_MANGLE_SUFFIX_LENGTH) {
95 LOG(log_error, logtype_afpd, "mangle: Failed to find a free mangle suffix; returning original filename");
101 if (cnid_mangle_add(vol->v_db, m, filename) < 0) {
107 #endif /* FILE_MANGLING */