package/toolbox/src/lib/fgetln.c

   1 /*-
   2  * Copyright (c) 2007, 2009
   3  *      Thorsten Glaser <tg@mirbsd.org>
   4  *
   5  * Provided that these terms and disclaimer and all copyright notices
   6  * are retained or reproduced in an accompanying document, permission
   7  * is granted to deal in this work without restriction, including un-
   8  * limited rights to use, publicly perform, distribute, sell, modify,
   9  * merge, give away, or sublicence.
  10  *
  11  * This work is provided "AS IS" and WITHOUT WARRANTY of any kind, to
  12  * the utmost extent permitted by applicable law, neither express nor
  13  * implied; without malicious intent or gross negligence. In no event
  14  * may a licensor, author or contributor be held liable for indirect,
  15  * direct, other damage, loss, or other issues arising in any way out
  16  * of dealing in the work, even if advised of the possibility of such
  17  * damage or existence of a defect, except proven that it results out
  18  * of said person's immediate fault when using the work as intended.
  19  *-
  20  * fgetln() wrapper for operating systems with getline() – glibc
  21  */
  22
  23 #undef _GNU_SOURCE
  24 #define _GNU_SOURCE             /* for getline() */
  25 #include <sys/types.h>
  26 #include <stdio.h>
  27 #include <string.h>
  28
  29 __RCSID("$MirOS: contrib/code/mirmake/dist/contrib/fgetln.c,v 1.7 2014/12/20 22:23:29 tg Exp $");
  30
  31 char *fgetln(FILE *, size_t *);
  32
  33 char *
  34 fgetln(FILE *stream, size_t *len)
  35 {
  36         static char *lb = NULL;
  37         static size_t lbsz = 0;
  38
  39         if ((*len = getline(&lb, &lbsz, stream)) != (size_t)-1)
  40                 /* getdelim ensures *len is not 0 here */
  41                 return (lb);
  42
  43         /* not required by manpage, but reference implementation does this */
  44         *len = 0;
  45
  46         /* not required to zero lb or lbsz: getdelim manages it */
  47         return (NULL);
  48 }