diff options
Diffstat (limited to 'compat/getline.c')
-rw-r--r-- | compat/getline.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/compat/getline.c b/compat/getline.c new file mode 100644 index 0000000..3f01b66 --- /dev/null +++ b/compat/getline.c @@ -0,0 +1,75 @@ +/* + * dhcpcd - DHCP client daemon + * Copyright (c) 2006-2009 Roy Marples <roy@marples.name> + * All rights reserved + + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <errno.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "getline.h" + +/* Redefine a small buffer for our simple text config files */ +#undef BUFSIZ +#define BUFSIZ 128 + +ssize_t +getline(char ** __restrict buf, size_t * __restrict buflen, + FILE * __restrict fp) +{ + size_t bytes, newlen; + char *newbuf, *p; + + if (buf == NULL || buflen == NULL) { + errno = EINVAL; + return -1; + } + if (*buf == NULL) + *buflen = 0; + + bytes = 0; + do { + if (feof(fp)) + break; + if (*buf == NULL || bytes != 0) { + newlen = *buflen + BUFSIZ; + newbuf = realloc(*buf, newlen); + if (newbuf == NULL) + return -1; + *buf = newbuf; + *buflen = newlen; + } + p = *buf + bytes; + memset(p, 0, BUFSIZ); + if (fgets(p, BUFSIZ, fp) == NULL) + break; + bytes += strlen(p); + } while (bytes == 0 || *(*buf + (bytes - 1)) != '\n'); + if (bytes == 0) + return -1; + return bytes; +} |