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/*-
* Copyright (c) 2003 Networks Associates Technology, Inc.
* Copyright (c) 2004-2011 Dag-Erling Smørgrav
* All rights reserved.
*
* This software was developed for the FreeBSD Project by ThinkSec AS and
* Network Associates Laboratories, the Security Research Division of
* Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035
* ("CBOSS"), as part of the DARPA CHATS research program.
*
* 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.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* 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.
*
* $Id: openpam_readline.c 596 2012-04-14 14:52:40Z des $
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <security/pam_appl.h>
#include "openpam_impl.h"
#define MIN_LINE_LENGTH 128
/*
* OpenPAM extension
*
* Read a line from a file.
*/
char *
openpam_readline(FILE *f, int *lineno, size_t *lenp)
{
char *line;
size_t len, size;
int ch;
if ((line = malloc(size = MIN_LINE_LENGTH)) == NULL) {
openpam_log(PAM_LOG_ERROR, "malloc(): %m");
return (NULL);
}
len = 0;
for (;;) {
ch = fgetc(f);
/* strip comment */
if (ch == '#') {
do {
ch = fgetc(f);
} while (ch != EOF && ch != '\n');
}
/* eof */
if (ch == EOF) {
/* done */
break;
}
/* eol */
if (ch == '\n') {
if (lineno != NULL)
++*lineno;
/* skip blank lines */
if (len == 0)
continue;
/* continuation */
if (line[len - 1] == '\\') {
line[--len] = '\0';
continue;
}
/* done */
break;
}
/* anything else */
if (openpam_straddch(&line, &size, &len, ch) != 0)
goto fail;
}
if (len == 0)
goto fail;
if (lenp != NULL)
*lenp = len;
openpam_log(PAM_LOG_LIBDEBUG, "returning '%s'", line);
return (line);
fail:
FREE(line);
return (NULL);
}
/**
* DEPRECATED openpam_readlinev
*
* The =openpam_readline function reads a line from a file, and returns it
* in a NUL-terminated buffer allocated with =!malloc.
*
* The =openpam_readline function performs a certain amount of processing
* on the data it reads:
*
* - Comments (introduced by a hash sign) are stripped.
*
* - Blank lines are ignored.
*
* - If a line ends in a backslash, the backslash is stripped and the
* next line is appended.
*
* If =lineno is not =NULL, the integer variable it points to is
* incremented every time a newline character is read.
*
* If =lenp is not =NULL, the length of the line (not including the
* terminating NUL character) is stored in the variable it points to.
*
* The caller is responsible for releasing the returned buffer by passing
* it to =!free.
*
* >openpam_readlinev
* >openpam_readword
*/
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