2 * Unix SMB/CIFS implementation.
3 * SMB parameters and setup
4 * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
6 * This program is free software; you can redistribute it and/or modify it under
7 * the terms of the GNU General Public License as published by the Free
8 * Software Foundation; either version 2 of the License, or (at your option)
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program; if not, write to the Free Software Foundation, Inc., 675
18 * Mass Ave, Cambridge, MA 02139, USA.
24 #define MAP_FAILED ((void *)-1)
29 /***************************************************************
30 Signal function to tell us we timed out.
31 ****************************************************************/
33 static void gotalarm_sig(void)
38 /***************************************************************
39 Lock or unlock a fd for a known lock type. Abandon after waitsecs
41 ****************************************************************/
43 BOOL do_file_lock(int fd, int waitsecs, int type)
45 SMB_STRUCT_FLOCK lock;
47 void (*oldsig_handler)(int);
50 oldsig_handler = CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
53 lock.l_whence = SEEK_SET;
59 /* Note we must *NOT* use sys_fcntl here ! JRA */
60 ret = fcntl(fd, SMB_F_SETLKW, &lock);
62 CatchSignal(SIGALRM, SIGNAL_CAST oldsig_handler);
65 DEBUG(0, ("do_file_lock: failed to %s file.\n",
66 type == F_UNLCK ? "unlock" : "lock"));
73 /***************************************************************
74 Lock an fd. Abandon after waitsecs seconds.
75 ****************************************************************/
77 BOOL file_lock(int fd, int type, int secs, int *plock_depth)
84 if ((*plock_depth) == 0) {
85 if (!do_file_lock(fd, secs, type)) {
86 DEBUG(10,("file_lock: locking file failed, error = %s.\n", strerror(errno)));
94 /***************************************************************
95 Unlock an fd. Abandon after waitsecs seconds.
96 ****************************************************************/
98 BOOL file_unlock(int fd, int *plock_depth)
102 if(*plock_depth == 1) {
103 ret = do_file_lock(fd, 5, F_UNLCK);
109 DEBUG(10,("file_unlock: unlocking file failed, error = %s.\n", strerror(errno)));
114 /***************************************************************
115 Locks a file for enumeration / modification.
116 update to be set = True if modification is required.
117 ****************************************************************/
119 void *startfilepwent(char *pfile, char *s_readbuf, int bufsize,
120 int *file_lock_depth, BOOL update)
125 DEBUG(0, ("startfilepwent: No file set\n"));
128 DEBUG(10, ("startfilepwent: opening file %s\n", pfile));
130 fp = sys_fopen(pfile, update ? "r+b" : "rb");
133 DEBUG(0, ("startfilepwent: unable to open file %s\n", pfile));
137 /* Set a buffer to do more efficient reads */
138 setvbuf(fp, s_readbuf, _IOFBF, bufsize);
140 if (!file_lock(fileno(fp), (update ? F_WRLCK : F_RDLCK), 5, file_lock_depth)) {
141 DEBUG(0, ("startfilepwent: unable to lock file %s\n", pfile));
146 /* Make sure it is only rw by the owner */
149 /* We have a lock on the file. */
153 /***************************************************************
154 End enumeration of the file.
155 ****************************************************************/
157 void endfilepwent(void *vp, int *file_lock_depth)
159 FILE *fp = (FILE *)vp;
161 file_unlock(fileno(fp), file_lock_depth);
163 DEBUG(7, ("endfilepwent: closed file.\n"));
166 /*************************************************************************
167 Return the current position in the file list as an SMB_BIG_UINT.
168 This must be treated as an opaque token.
169 *************************************************************************/
171 SMB_BIG_UINT getfilepwpos(void *vp)
173 return (SMB_BIG_UINT)sys_ftell((FILE *)vp);
176 /*************************************************************************
177 Set the current position in the file list from an SMB_BIG_UINT.
178 This must be treated as an opaque token.
179 *************************************************************************/
181 BOOL setfilepwpos(void *vp, SMB_BIG_UINT tok)
183 return !sys_fseek((FILE *)vp, (SMB_OFF_T)tok, SEEK_SET);
186 /*************************************************************************
187 Gets a line out of a file.
188 line is of format "xxxx:xxxxxx:xxxxx:".
189 lines with "#" at the front are ignored.
190 *************************************************************************/
192 int getfileline(void *vp, char *linebuf, int linebuf_size)
194 /* Static buffers we will return. */
195 FILE *fp = (FILE *)vp;
201 DEBUG(0,("getfileline: Bad file pointer.\n"));
206 * Scan the file, a line at a time.
211 fgets(linebuf, linebuf_size, fp);
217 * Check if the string is terminated with a newline - if not
218 * then we must keep reading and discard until we get one.
221 linebuf_len = strlen(linebuf);
222 if (linebuf_len == 0) {
227 if (linebuf[linebuf_len - 1] != '\n') {
229 while (!ferror(fp) && !feof(fp)) {
236 linebuf[linebuf_len - 1] = '\0';
239 #ifdef DEBUG_PASSWORD
240 DEBUG(100, ("getfileline: got line |%s|\n", linebuf));
242 if ((linebuf[0] == 0) && feof(fp)) {
243 DEBUG(4, ("getfileline: end of file reached\n"));
247 if (linebuf[0] == '#' || linebuf[0] == '\0') {
248 DEBUG(6, ("getfileline: skipping comment or blank line\n"));
252 p = (unsigned char *) strchr_m(linebuf, ':');
254 DEBUG(0, ("getfileline: malformed line entry (no :)\n"));
262 /****************************************************************************
263 Read a line from a file with possible \ continuation chars.
264 Blanks at the start or end of a line are stripped.
265 The string will be allocated if s2 is NULL.
266 ****************************************************************************/
268 char *fgets_slash(char *s2,int maxlen,XFILE *f)
273 BOOL start_of_line = True;
284 maxlen = MIN(maxlen,8);
285 s = (char *)SMB_MALLOC(maxlen);
294 while (len < maxlen-1) {
300 while (len > 0 && s[len-1] == ' ') {
303 if (len > 0 && s[len-1] == '\\') {
305 start_of_line = True;
310 if (len <= 0 && !s2) {
313 return(len>0?s:NULL);
319 start_of_line = False;
324 if (!s2 && len > maxlen-3) {
328 t = (char *)SMB_REALLOC(s,maxlen);
330 DEBUG(0,("fgets_slash: failed to expand buffer!\n"));
341 /****************************************************************************
342 Load from a pipe into memory.
343 ****************************************************************************/
345 char *file_pload(char *syscmd, size_t *size)
352 fd = sys_popen(syscmd);
360 while ((n = read(fd, buf, sizeof(buf))) > 0) {
361 tp = SMB_REALLOC(p, total + n + 1);
363 DEBUG(0,("file_pload: failed to expand buffer!\n"));
370 memcpy(p+total, buf, n);
375 /* FIXME: Perhaps ought to check that the command completed
376 * successfully (returned 0); if not the data may be
387 /****************************************************************************
388 Load a file into memory from a fd.
389 ****************************************************************************/
391 char *fd_load(int fd, size_t *size)
393 SMB_STRUCT_STAT sbuf;
396 if (sys_fstat(fd, &sbuf) != 0) {
400 p = (char *)SMB_MALLOC(sbuf.st_size+1);
405 if (read(fd, p, sbuf.st_size) != sbuf.st_size) {
412 *size = sbuf.st_size;
418 /****************************************************************************
419 Load a file into memory.
420 ****************************************************************************/
422 char *file_load(const char *fname, size_t *size)
427 if (!fname || !*fname) {
431 fd = open(fname,O_RDONLY);
436 p = fd_load(fd, size);
441 /*******************************************************************
442 mmap (if possible) or read a file.
443 ********************************************************************/
445 void *map_file(char *fname, size_t size)
451 fd = open(fname, O_RDONLY, 0);
453 DEBUG(2,("map_file: Failed to load %s - %s\n", fname, strerror(errno)));
456 p = mmap(NULL, size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
458 if (p == MAP_FAILED) {
459 DEBUG(1,("map_file: Failed to mmap %s - %s\n", fname, strerror(errno)));
464 p = file_load(fname, &s2);
469 DEBUG(1,("map_file: incorrect size for %s - got %lu expected %lu\n",
470 fname, (unsigned long)s2, (unsigned long)size));
478 /****************************************************************************
479 Parse a buffer into lines.
480 ****************************************************************************/
482 static char **file_lines_parse(char *p, size_t size, int *numlines)
491 for (s = p, i=0; s < p+size; s++) {
492 if (s[0] == '\n') i++;
495 ret = SMB_MALLOC_ARRAY(char *, i+2);
500 memset(ret, 0, sizeof(ret[0])*(i+2));
506 for (s = p, i=0; s < p+size; s++) {
520 /****************************************************************************
521 Load a file into memory and return an array of pointers to lines in the file
522 must be freed with file_lines_free().
523 ****************************************************************************/
525 char **file_lines_load(const char *fname, int *numlines)
530 p = file_load(fname, &size);
535 return file_lines_parse(p, size, numlines);
538 /****************************************************************************
539 Load a fd into memory and return an array of pointers to lines in the file
540 must be freed with file_lines_free(). If convert is true calls unix_to_dos on
542 ****************************************************************************/
544 char **fd_lines_load(int fd, int *numlines)
549 p = fd_load(fd, &size);
554 return file_lines_parse(p, size, numlines);
557 /****************************************************************************
558 Load a pipe into memory and return an array of pointers to lines in the data
559 must be freed with file_lines_free().
560 ****************************************************************************/
562 char **file_lines_pload(char *syscmd, int *numlines)
567 p = file_pload(syscmd, &size);
572 return file_lines_parse(p, size, numlines);
575 /****************************************************************************
576 Free lines loaded with file_lines_load.
577 ****************************************************************************/
579 void file_lines_free(char **lines)
588 /****************************************************************************
589 Take a list of lines and modify them to produce a list where \ continues
591 ****************************************************************************/
593 void file_lines_slashcont(char **lines)
597 for (i=0; lines[i];) {
598 int len = strlen(lines[i]);
599 if (lines[i][len-1] == '\\') {
600 lines[i][len-1] = ' ';
602 char *p = &lines[i][len];
603 while (p < lines[i+1]) {
606 for (j = i+1; lines[j]; j++) {
607 lines[j] = lines[j+1];
616 /****************************************************************************
617 Save a lump of data into a file. Mostly used for debugging.
618 ****************************************************************************/
620 BOOL file_save(const char *fname, void *packet, size_t length)
623 fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0644);
627 if (write(fd, packet, length) != (size_t)length) {