61a759b10b2c3dad4d85716ffe5ef1dd55979625
1 /**
2 * collectd - src/common.c
3 * Copyright (C) 2005-2008 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 * Niki W. Waibel <niki.waibel@gmx.net>
21 **/
23 #if HAVE_CONFIG_H
24 # include "config.h"
25 #endif
27 #include "collectd.h"
28 #include "common.h"
29 #include "plugin.h"
31 #if HAVE_PTHREAD_H
32 # include <pthread.h>
33 #endif
35 #ifdef HAVE_MATH_H
36 # include <math.h>
37 #endif
39 /* for ntohl and htonl */
40 #if HAVE_ARPA_INET_H
41 # include <arpa/inet.h>
42 #endif
44 #ifdef HAVE_LIBKSTAT
45 extern kstat_ctl_t *kc;
46 #endif
48 #if !HAVE_GETPWNAM_R
49 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
50 #endif
52 #if !HAVE_STRERROR_R
53 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
54 #endif
56 char *sstrncpy (char *dest, const char *src, size_t n)
57 {
58 strncpy (dest, src, n);
59 dest[n - 1] = '\0';
61 return (dest);
62 } /* char *sstrncpy */
64 int ssnprintf (char *dest, size_t n, const char *format, ...)
65 {
66 int ret = 0;
67 va_list ap;
69 va_start (ap, format);
70 ret = vsnprintf (dest, n, format, ap);
71 dest[n - 1] = '\0';
72 va_end (ap);
74 return (ret);
75 } /* int ssnprintf */
77 char *sstrdup (const char *s)
78 {
79 char *r;
81 if (s == NULL)
82 return (NULL);
84 if((r = strdup (s)) == NULL)
85 {
86 ERROR ("Not enough memory.");
87 exit (3);
88 }
90 return (r);
91 } /* char *sstrdup */
93 /* Even though Posix requires "strerror_r" to return an "int",
94 * some systems (e.g. the GNU libc) return a "char *" _and_
95 * ignore the second argument ... -tokkee */
96 char *sstrerror (int errnum, char *buf, size_t buflen)
97 {
98 buf[0] = '\0';
100 #if !HAVE_STRERROR_R
101 {
102 char *temp;
104 pthread_mutex_lock (&strerror_r_lock);
106 temp = strerror (errnum);
107 sstrncpy (buf, temp, buflen);
109 pthread_mutex_unlock (&strerror_r_lock);
110 }
111 /* #endif !HAVE_STRERROR_R */
113 #elif STRERROR_R_CHAR_P
114 {
115 char *temp;
116 temp = strerror_r (errnum, buf, buflen);
117 if (buf[0] == '\0')
118 {
119 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
120 sstrncpy (buf, temp, buflen);
121 else
122 sstrncpy (buf, "strerror_r did not return "
123 "an error message", buflen);
124 }
125 }
126 /* #endif STRERROR_R_CHAR_P */
128 #else
129 if (strerror_r (errnum, buf, buflen) != 0)
130 {
131 ssnprintf (buf, buflen, "Error #%i; "
132 "Additionally, strerror_r failed.",
133 errnum);
134 }
135 #endif /* STRERROR_R_CHAR_P */
137 return (buf);
138 } /* char *sstrerror */
140 void *smalloc (size_t size)
141 {
142 void *r;
144 if ((r = malloc (size)) == NULL)
145 {
146 ERROR ("Not enough memory.");
147 exit (3);
148 }
150 return (r);
151 } /* void *smalloc */
153 #if 0
154 void sfree (void **ptr)
155 {
156 if (ptr == NULL)
157 return;
159 if (*ptr != NULL)
160 free (*ptr);
162 *ptr = NULL;
163 }
164 #endif
166 ssize_t sread (int fd, void *buf, size_t count)
167 {
168 char *ptr;
169 size_t nleft;
170 ssize_t status;
172 ptr = (char *) buf;
173 nleft = count;
175 while (nleft > 0)
176 {
177 status = read (fd, (void *) ptr, nleft);
179 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
180 continue;
182 if (status < 0)
183 return (status);
185 if (status == 0)
186 {
187 DEBUG ("Received EOF from fd %i. "
188 "Closing fd and returning error.",
189 fd);
190 close (fd);
191 return (-1);
192 }
194 assert ((0 > status) || (nleft >= (size_t)status));
196 nleft = nleft - status;
197 ptr = ptr + status;
198 }
200 return (0);
201 }
204 ssize_t swrite (int fd, const void *buf, size_t count)
205 {
206 const char *ptr;
207 size_t nleft;
208 ssize_t status;
210 ptr = (const char *) buf;
211 nleft = count;
213 while (nleft > 0)
214 {
215 status = write (fd, (const void *) ptr, nleft);
217 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
218 continue;
220 if (status < 0)
221 return (status);
223 nleft = nleft - status;
224 ptr = ptr + status;
225 }
227 return (0);
228 }
230 int strsplit (char *string, char **fields, size_t size)
231 {
232 size_t i;
233 char *ptr;
234 char *saveptr;
236 i = 0;
237 ptr = string;
238 saveptr = NULL;
239 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
240 {
241 ptr = NULL;
242 i++;
244 if (i >= size)
245 break;
246 }
248 return (i);
249 }
251 int strjoin (char *dst, size_t dst_len,
252 char **fields, size_t fields_num,
253 const char *sep)
254 {
255 size_t field_len;
256 size_t sep_len;
257 int i;
259 memset (dst, '\0', dst_len);
261 if (fields_num <= 0)
262 return (-1);
264 sep_len = 0;
265 if (sep != NULL)
266 sep_len = strlen (sep);
268 for (i = 0; i < (int)fields_num; i++)
269 {
270 if ((i > 0) && (sep_len > 0))
271 {
272 if (dst_len <= sep_len)
273 return (-1);
275 strncat (dst, sep, dst_len);
276 dst_len -= sep_len;
277 }
279 field_len = strlen (fields[i]);
281 if (dst_len <= field_len)
282 return (-1);
284 strncat (dst, fields[i], dst_len);
285 dst_len -= field_len;
286 }
288 return (strlen (dst));
289 }
291 int strsubstitute (char *str, char c_from, char c_to)
292 {
293 int ret;
295 if (str == NULL)
296 return (-1);
298 ret = 0;
299 while (*str != '\0')
300 {
301 if (*str == c_from)
302 {
303 *str = c_to;
304 ret++;
305 }
306 str++;
307 }
309 return (ret);
310 } /* int strsubstitute */
312 int escape_slashes (char *buf, int buf_len)
313 {
314 int i;
316 if (strcmp (buf, "/") == 0)
317 {
318 if (buf_len < 5)
319 return (-1);
321 strncpy (buf, "root", buf_len);
322 return (0);
323 }
325 if (buf_len <= 1)
326 return (0);
328 /* Move one to the left */
329 if (buf[0] == '/')
330 memmove (buf, buf + 1, buf_len - 1);
332 for (i = 0; i < buf_len - 1; i++)
333 {
334 if (buf[i] == '\0')
335 break;
336 else if (buf[i] == '/')
337 buf[i] = '_';
338 }
339 buf[i] = '\0';
341 return (0);
342 } /* int escape_slashes */
344 int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret)
345 {
346 if ((tv0 == NULL) || (tv1 == NULL) || (ret == NULL))
347 return (-2);
349 if ((tv0->tv_sec < tv1->tv_sec)
350 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
351 return (-1);
353 ret->tv_sec = tv0->tv_sec - tv1->tv_sec;
354 ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec));
356 if (ret->tv_nsec < 0)
357 {
358 assert (ret->tv_sec > 0);
360 ret->tv_nsec += 1000000000;
361 ret->tv_sec -= 1;
362 }
364 return (0);
365 }
367 int check_create_dir (const char *file_orig)
368 {
369 struct stat statbuf;
371 char file_copy[512];
372 char dir[512];
373 int dir_len = 512;
374 char *fields[16];
375 int fields_num;
376 char *ptr;
377 char *saveptr;
378 int last_is_file = 1;
379 int path_is_absolute = 0;
380 int len;
381 int i;
383 /*
384 * Sanity checks first
385 */
386 if (file_orig == NULL)
387 return (-1);
389 if ((len = strlen (file_orig)) < 1)
390 return (-1);
391 else if (len >= sizeof (file_copy))
392 return (-1);
394 /*
395 * If `file_orig' ends in a slash the last component is a directory,
396 * otherwise it's a file. Act accordingly..
397 */
398 if (file_orig[len - 1] == '/')
399 last_is_file = 0;
400 if (file_orig[0] == '/')
401 path_is_absolute = 1;
403 /*
404 * Create a copy for `strtok_r' to destroy
405 */
406 sstrncpy (file_copy, file_orig, sizeof (file_copy));
408 /*
409 * Break into components. This will eat up several slashes in a row and
410 * remove leading and trailing slashes..
411 */
412 ptr = file_copy;
413 saveptr = NULL;
414 fields_num = 0;
415 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
416 {
417 ptr = NULL;
418 fields_num++;
420 if (fields_num >= 16)
421 break;
422 }
424 /*
425 * For each component, do..
426 */
427 for (i = 0; i < (fields_num - last_is_file); i++)
428 {
429 /*
430 * Do not create directories that start with a dot. This
431 * prevents `../../' attacks and other likely malicious
432 * behavior.
433 */
434 if (fields[i][0] == '.')
435 {
436 ERROR ("Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig);
437 return (-2);
438 }
440 /*
441 * Join the components together again
442 */
443 dir[0] = '/';
444 if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
445 fields, i + 1, "/") < 0)
446 {
447 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
448 return (-1);
449 }
451 if (stat (dir, &statbuf) == -1)
452 {
453 if (errno == ENOENT)
454 {
455 if (mkdir (dir, 0755) == -1)
456 {
457 char errbuf[1024];
458 ERROR ("check_create_dir: mkdir (%s): %s", dir,
459 sstrerror (errno,
460 errbuf, sizeof (errbuf)));
461 return (-1);
462 }
463 }
464 else
465 {
466 char errbuf[1024];
467 ERROR ("stat (%s): %s", dir,
468 sstrerror (errno, errbuf,
469 sizeof (errbuf)));
470 return (-1);
471 }
472 }
473 else if (!S_ISDIR (statbuf.st_mode))
474 {
475 ERROR ("stat (%s): Not a directory!", dir);
476 return (-1);
477 }
478 }
480 return (0);
481 } /* check_create_dir */
483 #ifdef HAVE_LIBKSTAT
484 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
485 {
486 char ident[128];
488 if (kc == NULL)
489 return (-1);
491 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
493 if (*ksp_ptr == NULL)
494 {
495 if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL)
496 {
497 ERROR ("Cound not find kstat %s", ident);
498 return (-1);
499 }
501 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
502 {
503 WARNING ("kstat %s has wrong type", ident);
504 *ksp_ptr = NULL;
505 return (-1);
506 }
507 }
509 #ifdef assert
510 assert (*ksp_ptr != NULL);
511 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
512 #endif
514 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
515 {
516 WARNING ("kstat %s could not be read", ident);
517 return (-1);
518 }
520 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
521 {
522 WARNING ("kstat %s has wrong type", ident);
523 return (-1);
524 }
526 return (0);
527 }
529 long long get_kstat_value (kstat_t *ksp, char *name)
530 {
531 kstat_named_t *kn;
532 long long retval = -1LL;
534 #ifdef assert
535 assert (ksp != NULL);
536 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
537 #else
538 if (ksp == NULL)
539 {
540 fprintf (stderr, "ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
541 return (-1LL);
542 }
543 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
544 {
545 fprintf (stderr, "ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
546 return (-1LL);
547 }
548 #endif
550 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
551 return (retval);
553 if (kn->data_type == KSTAT_DATA_INT32)
554 retval = (long long) kn->value.i32;
555 else if (kn->data_type == KSTAT_DATA_UINT32)
556 retval = (long long) kn->value.ui32;
557 else if (kn->data_type == KSTAT_DATA_INT64)
558 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
559 else if (kn->data_type == KSTAT_DATA_UINT64)
560 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
561 else
562 WARNING ("get_kstat_value: Not a numeric value: %s", name);
564 return (retval);
565 }
566 #endif /* HAVE_LIBKSTAT */
568 unsigned long long ntohll (unsigned long long n)
569 {
570 #if BYTE_ORDER == BIG_ENDIAN
571 return (n);
572 #else
573 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
574 #endif
575 } /* unsigned long long ntohll */
577 unsigned long long htonll (unsigned long long n)
578 {
579 #if BYTE_ORDER == BIG_ENDIAN
580 return (n);
581 #else
582 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
583 #endif
584 } /* unsigned long long htonll */
586 #if FP_LAYOUT_NEED_NOTHING
587 /* Well, we need nothing.. */
588 /* #endif FP_LAYOUT_NEED_NOTHING */
590 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
591 # if FP_LAYOUT_NEED_ENDIANFLIP
592 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
593 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
594 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
595 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
596 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
597 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
598 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
599 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
600 # else
601 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
602 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
603 # endif
605 double ntohd (double d)
606 {
607 union
608 {
609 uint8_t byte[8];
610 uint64_t integer;
611 double floating;
612 } ret;
614 ret.floating = d;
616 /* NAN in x86 byte order */
617 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
618 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
619 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
620 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
621 {
622 return (NAN);
623 }
624 else
625 {
626 uint64_t tmp;
628 tmp = ret.integer;
629 ret.integer = FP_CONVERT (tmp);
630 return (ret.floating);
631 }
632 } /* double ntohd */
634 double htond (double d)
635 {
636 union
637 {
638 uint8_t byte[8];
639 uint64_t integer;
640 double floating;
641 } ret;
643 if (isnan (d))
644 {
645 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
646 ret.byte[4] = ret.byte[5] = 0x00;
647 ret.byte[6] = 0xf8;
648 ret.byte[7] = 0x7f;
649 return (ret.floating);
650 }
651 else
652 {
653 uint64_t tmp;
655 ret.floating = d;
656 tmp = FP_CONVERT (ret.integer);
657 ret.integer = tmp;
658 return (ret.floating);
659 }
660 } /* double htond */
661 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
663 int format_name (char *ret, int ret_len,
664 const char *hostname,
665 const char *plugin, const char *plugin_instance,
666 const char *type, const char *type_instance)
667 {
668 int status;
670 assert (plugin != NULL);
671 assert (type != NULL);
673 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
674 {
675 if ((type_instance == NULL) || (strlen (type_instance) == 0))
676 status = ssnprintf (ret, ret_len, "%s/%s/%s",
677 hostname, plugin, type);
678 else
679 status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
680 hostname, plugin, type,
681 type_instance);
682 }
683 else
684 {
685 if ((type_instance == NULL) || (strlen (type_instance) == 0))
686 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
687 hostname, plugin, plugin_instance,
688 type);
689 else
690 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
691 hostname, plugin, plugin_instance,
692 type, type_instance);
693 }
695 if ((status < 1) || (status >= ret_len))
696 return (-1);
697 return (0);
698 } /* int format_name */
700 int parse_identifier (char *str, char **ret_host,
701 char **ret_plugin, char **ret_plugin_instance,
702 char **ret_type, char **ret_type_instance)
703 {
704 char *hostname = NULL;
705 char *plugin = NULL;
706 char *plugin_instance = NULL;
707 char *type = NULL;
708 char *type_instance = NULL;
710 hostname = str;
711 if (hostname == NULL)
712 return (-1);
714 plugin = strchr (hostname, '/');
715 if (plugin == NULL)
716 return (-1);
717 *plugin = '\0'; plugin++;
719 type = strchr (plugin, '/');
720 if (type == NULL)
721 return (-1);
722 *type = '\0'; type++;
724 plugin_instance = strchr (plugin, '-');
725 if (plugin_instance != NULL)
726 {
727 *plugin_instance = '\0';
728 plugin_instance++;
729 }
731 type_instance = strchr (type, '-');
732 if (type_instance != NULL)
733 {
734 *type_instance = '\0';
735 type_instance++;
736 }
738 *ret_host = hostname;
739 *ret_plugin = plugin;
740 *ret_plugin_instance = plugin_instance;
741 *ret_type = type;
742 *ret_type_instance = type_instance;
743 return (0);
744 } /* int parse_identifier */
746 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
747 {
748 int i;
749 char *dummy;
750 char *ptr;
751 char *saveptr;
753 i = -1;
754 dummy = buffer;
755 saveptr = NULL;
756 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
757 {
758 dummy = NULL;
760 if (i >= vl->values_len)
761 break;
763 if (i == -1)
764 {
765 if (strcmp ("N", ptr) == 0)
766 vl->time = time (NULL);
767 else
768 vl->time = (time_t) atoi (ptr);
769 }
770 else
771 {
772 if (strcmp ("U", ptr) == 0)
773 vl->values[i].gauge = NAN;
774 else if (ds->ds[i].type == DS_TYPE_COUNTER)
775 vl->values[i].counter = atoll (ptr);
776 else if (ds->ds[i].type == DS_TYPE_GAUGE)
777 vl->values[i].gauge = atof (ptr);
778 }
780 i++;
781 } /* while (strtok_r) */
783 if ((ptr != NULL) || (i != vl->values_len))
784 return (-1);
785 return (0);
786 } /* int parse_values */
788 #if !HAVE_GETPWNAM_R
789 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
790 size_t buflen, struct passwd **pwbufp)
791 {
792 int status = 0;
793 struct passwd *pw;
795 memset (pwbuf, '\0', sizeof (struct passwd));
797 pthread_mutex_lock (&getpwnam_r_lock);
799 do
800 {
801 pw = getpwnam (name);
802 if (pw == NULL)
803 {
804 status = (errno != 0) ? errno : ENOENT;
805 break;
806 }
808 #define GETPWNAM_COPY_MEMBER(member) \
809 if (pw->member != NULL) \
810 { \
811 int len = strlen (pw->member); \
812 if (len >= buflen) \
813 { \
814 status = ENOMEM; \
815 break; \
816 } \
817 sstrncpy (buf, pw->member, buflen); \
818 pwbuf->member = buf; \
819 buf += (len + 1); \
820 buflen -= (len + 1); \
821 }
822 GETPWNAM_COPY_MEMBER(pw_name);
823 GETPWNAM_COPY_MEMBER(pw_passwd);
824 GETPWNAM_COPY_MEMBER(pw_gecos);
825 GETPWNAM_COPY_MEMBER(pw_dir);
826 GETPWNAM_COPY_MEMBER(pw_shell);
828 pwbuf->pw_uid = pw->pw_uid;
829 pwbuf->pw_gid = pw->pw_gid;
831 if (pwbufp != NULL)
832 *pwbufp = pwbuf;
833 } while (0);
835 pthread_mutex_unlock (&getpwnam_r_lock);
837 return (status);
838 } /* int getpwnam_r */
839 #endif /* !HAVE_GETPWNAM_R */
841 int notification_init (notification_t *n, int severity, const char *message,
842 const char *host,
843 const char *plugin, const char *plugin_instance,
844 const char *type, const char *type_instance)
845 {
846 memset (n, '\0', sizeof (notification_t));
848 n->severity = severity;
850 if (message != NULL)
851 sstrncpy (n->message, message, sizeof (n->message));
852 if (host != NULL)
853 sstrncpy (n->host, host, sizeof (n->host));
854 if (plugin != NULL)
855 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
856 if (plugin_instance != NULL)
857 sstrncpy (n->plugin_instance, plugin_instance,
858 sizeof (n->plugin_instance));
859 if (type != NULL)
860 sstrncpy (n->type, type, sizeof (n->type));
861 if (type_instance != NULL)
862 sstrncpy (n->type_instance, type_instance,
863 sizeof (n->type_instance));
865 return (0);
866 } /* int notification_init */
868 int walk_directory (const char *dir, dirwalk_callback_f callback,
869 void *user_data)
870 {
871 struct dirent *ent;
872 DIR *dh;
873 int success;
874 int failure;
876 success = 0;
877 failure = 0;
879 if ((dh = opendir (dir)) == NULL)
880 {
881 char errbuf[1024];
882 ERROR ("walk_directory: Cannot open '%s': %s", dir,
883 sstrerror (errno, errbuf, sizeof (errbuf)));
884 return -1;
885 }
887 while ((ent = readdir (dh)) != NULL)
888 {
889 int status;
891 if (ent->d_name[0] == '.')
892 continue;
894 status = (*callback) (dir, ent->d_name, user_data);
895 if (status != 0)
896 failure++;
897 else
898 success++;
899 }
901 closedir (dh);
903 if ((success == 0) && (failure > 0))
904 return (-1);
905 return (0);
906 }
908 int read_file_contents (const char *filename, char *buf, int bufsize)
909 {
910 FILE *fh;
911 int n;
913 if ((fh = fopen (filename, "r")) == NULL)
914 return -1;
916 n = fread(buf, 1, bufsize, fh);
917 fclose(fh);
919 return n;
920 }