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)
30 /***************************************************************
31 Signal function to tell us we timed out.
32 ****************************************************************/
34 static void gotalarm_sig(void)
39 /***************************************************************
40 Lock or unlock a fd for a known lock type. Abandon after waitsecs
42 ****************************************************************/
44 BOOL do_file_lock(int fd, int waitsecs, int type)
46 SMB_STRUCT_FLOCK lock;
48 void (*oldsig_handler)(int);
51 oldsig_handler = CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
54 lock.l_whence = SEEK_SET;
60 /* Note we must *NOT* use sys_fcntl here ! JRA */
61 ret = fcntl(fd, SMB_F_SETLKW, &lock);
63 CatchSignal(SIGALRM, SIGNAL_CAST oldsig_handler);
66 DEBUG(0, ("do_file_lock: failed to %s file.\n",
67 type == F_UNLCK ? "unlock" : "lock"));
75 /***************************************************************
76 Lock an fd. Abandon after waitsecs seconds.
77 ****************************************************************/
79 BOOL file_lock(int fd, int type, int secs, int *plock_depth)
86 if ((*plock_depth) == 0)
88 if (!do_file_lock(fd, secs, type)) {
89 DEBUG(10,("file_lock: locking file failed, error = %s.\n",
98 /***************************************************************
99 Unlock an fd. Abandon after waitsecs seconds.
100 ****************************************************************/
102 BOOL file_unlock(int fd, int *plock_depth)
106 if(*plock_depth == 1)
107 ret = do_file_lock(fd, 5, F_UNLCK);
112 DEBUG(10,("file_unlock: unlocking file failed, error = %s.\n",
117 /***************************************************************
118 locks a file for enumeration / modification.
119 update to be set = True if modification is required.
120 ****************************************************************/
122 void *startfilepwent(char *pfile, char *s_readbuf, int bufsize,
123 int *file_lock_depth, BOOL update)
129 DEBUG(0, ("startfilepwent: No file set\n"));
132 DEBUG(10, ("startfilepwent: opening file %s\n", pfile));
134 fp = sys_fopen(pfile, update ? "r+b" : "rb");
137 DEBUG(0, ("startfilepwent: unable to open file %s\n", pfile));
141 /* Set a buffer to do more efficient reads */
142 setvbuf(fp, s_readbuf, _IOFBF, bufsize);
144 if (!file_lock(fileno(fp), (update ? F_WRLCK : F_RDLCK), 5, file_lock_depth))
146 DEBUG(0, ("startfilepwent: unable to lock file %s\n", pfile));
151 /* Make sure it is only rw by the owner */
154 /* We have a lock on the file. */
158 /***************************************************************
159 End enumeration of the file.
160 ****************************************************************/
161 void endfilepwent(void *vp, int *file_lock_depth)
163 FILE *fp = (FILE *)vp;
165 file_unlock(fileno(fp), file_lock_depth);
167 DEBUG(7, ("endfilepwent: closed file.\n"));
170 /*************************************************************************
171 Return the current position in the file list as an SMB_BIG_UINT.
172 This must be treated as an opaque token.
173 *************************************************************************/
174 SMB_BIG_UINT getfilepwpos(void *vp)
176 return (SMB_BIG_UINT)sys_ftell((FILE *)vp);
179 /*************************************************************************
180 Set the current position in the file list from an SMB_BIG_UINT.
181 This must be treated as an opaque token.
182 *************************************************************************/
183 BOOL setfilepwpos(void *vp, SMB_BIG_UINT tok)
185 return !sys_fseek((FILE *)vp, (SMB_OFF_T)tok, SEEK_SET);
188 /*************************************************************************
189 gets a line out of a file.
190 line is of format "xxxx:xxxxxx:xxxxx:".
191 lines with "#" at the front are ignored.
192 *************************************************************************/
193 int getfileline(void *vp, char *linebuf, int linebuf_size)
195 /* Static buffers we will return. */
196 FILE *fp = (FILE *)vp;
203 DEBUG(0,("getfileline: Bad file pointer.\n"));
208 * Scan the file, a line at a time.
214 fgets(linebuf, linebuf_size, fp);
221 * Check if the string is terminated with a newline - if not
222 * then we must keep reading and discard until we get one.
225 linebuf_len = strlen(linebuf);
226 if (linebuf_len == 0)
232 if (linebuf[linebuf_len - 1] != '\n')
235 while (!ferror(fp) && !feof(fp))
246 linebuf[linebuf_len - 1] = '\0';
249 #ifdef DEBUG_PASSWORD
250 DEBUG(100, ("getfileline: got line |%s|\n", linebuf));
252 if ((linebuf[0] == 0) && feof(fp))
254 DEBUG(4, ("getfileline: end of file reached\n"));
258 if (linebuf[0] == '#' || linebuf[0] == '\0')
260 DEBUG(6, ("getfileline: skipping comment or blank line\n"));
264 p = (unsigned char *) strchr_m(linebuf, ':');
267 DEBUG(0, ("getfileline: malformed line entry (no :)\n"));
276 /****************************************************************************
277 read a line from a file with possible \ continuation chars.
278 Blanks at the start or end of a line are stripped.
279 The string will be allocated if s2 is NULL
280 ****************************************************************************/
281 char *fgets_slash(char *s2,int maxlen,XFILE *f)
286 BOOL start_of_line = True;
291 if (maxlen <2) return(NULL);
295 maxlen = MIN(maxlen,8);
296 s = (char *)malloc(maxlen);
299 if (!s) return(NULL);
303 while (len < maxlen-1)
311 while (len > 0 && s[len-1] == ' ')
315 if (len > 0 && s[len-1] == '\\')
318 start_of_line = True;
325 return(len>0?s:NULL);
330 start_of_line = False;
334 if (!s2 && len > maxlen-3)
339 t = (char *)Realloc(s,maxlen);
341 DEBUG(0,("fgets_slash: failed to expand buffer!\n"));
351 /****************************************************************************
352 load from a pipe into memory
353 ****************************************************************************/
354 char *file_pload(char *syscmd, size_t *size)
361 fd = sys_popen(syscmd);
362 if (fd == -1) return NULL;
367 while ((n = read(fd, buf, sizeof(buf))) > 0) {
368 tp = Realloc(p, total + n + 1);
370 DEBUG(0,("file_pload: failed to expand buffer!\n"));
375 memcpy(p+total, buf, n);
380 /* FIXME: Perhaps ought to check that the command completed
381 * successfully (returned 0); if not the data may be
385 if (size) *size = total;
390 /****************************************************************************
391 load a file into memory from a fd.
392 ****************************************************************************/
394 char *fd_load(int fd, size_t *size)
396 SMB_STRUCT_STAT sbuf;
399 if (sys_fstat(fd, &sbuf) != 0) return NULL;
401 p = (char *)malloc(sbuf.st_size+1);
404 if (read(fd, p, sbuf.st_size) != sbuf.st_size) {
410 if (size) *size = sbuf.st_size;
415 /****************************************************************************
416 load a file into memory
417 ****************************************************************************/
418 char *file_load(const char *fname, size_t *size)
423 if (!fname || !*fname) return NULL;
425 fd = open(fname,O_RDONLY);
426 if (fd == -1) return NULL;
428 p = fd_load(fd, size);
436 /*******************************************************************
437 mmap (if possible) or read a file
438 ********************************************************************/
439 void *map_file(char *fname, size_t size)
446 fd = open(fname, O_RDONLY, 0);
448 DEBUG(2,("Failed to load %s - %s\n", fname, strerror(errno)));
451 p = mmap(NULL, size, PROT_READ, MAP_SHARED|MAP_FILE, fd, 0);
453 if (p == MAP_FAILED) {
454 DEBUG(1,("Failed to mmap %s - %s\n", fname, strerror(errno)));
460 p = file_load(fname, &s2);
463 DEBUG(1,("incorrect size for %s - got %lu expected %lu\n",
464 fname, (unsigned long)s2, (unsigned long)size));
474 /****************************************************************************
475 parse a buffer into lines
476 ****************************************************************************/
477 static char **file_lines_parse(char *p, size_t size, int *numlines)
484 for (s = p, i=0; s < p+size; s++) {
485 if (s[0] == '\n') i++;
488 ret = (char **)malloc(sizeof(ret[0])*(i+2));
493 memset(ret, 0, sizeof(ret[0])*(i+2));
494 if (numlines) *numlines = i;
497 for (s = p, i=0; s < p+size; s++) {
503 if (s[0] == '\r') s[0] = 0;
510 /****************************************************************************
511 load a file into memory and return an array of pointers to lines in the file
512 must be freed with file_lines_free().
513 ****************************************************************************/
514 char **file_lines_load(const char *fname, int *numlines)
519 p = file_load(fname, &size);
522 return file_lines_parse(p, size, numlines);
525 /****************************************************************************
526 load a fd into memory and return an array of pointers to lines in the file
527 must be freed with file_lines_free(). If convert is true calls unix_to_dos on
529 ****************************************************************************/
530 char **fd_lines_load(int fd, int *numlines)
535 p = fd_load(fd, &size);
538 return file_lines_parse(p, size, numlines);
542 /****************************************************************************
543 load a pipe into memory and return an array of pointers to lines in the data
544 must be freed with file_lines_free().
545 ****************************************************************************/
546 char **file_lines_pload(char *syscmd, int *numlines)
551 p = file_pload(syscmd, &size);
554 return file_lines_parse(p, size, numlines);
557 /****************************************************************************
558 free lines loaded with file_lines_load
559 ****************************************************************************/
560 void file_lines_free(char **lines)
568 /****************************************************************************
569 take a lislist of lines and modify them to produce a list where \ continues
571 ****************************************************************************/
572 void file_lines_slashcont(char **lines)
576 for (i=0; lines[i];) {
577 int len = strlen(lines[i]);
578 if (lines[i][len-1] == '\\') {
579 lines[i][len-1] = ' ';
581 char *p = &lines[i][len];
582 while (p < lines[i+1]) *p++ = ' ';
583 for (j = i+1; lines[j]; j++) lines[j] = lines[j+1];
592 save a lump of data into a file. Mostly used for debugging
594 BOOL file_save(const char *fname, void *packet, size_t length)
597 fd = open(fname, O_WRONLY|O_CREAT|O_TRUNC, 0644);
601 if (write(fd, packet, length) != (size_t)length) {