diff options
Diffstat (limited to 'contrib/openpam/lib/libpam/openpam_readlinev.c')
-rw-r--r-- | contrib/openpam/lib/libpam/openpam_readlinev.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/contrib/openpam/lib/libpam/openpam_readlinev.c b/contrib/openpam/lib/libpam/openpam_readlinev.c new file mode 100644 index 0000000..5edc368 --- /dev/null +++ b/contrib/openpam/lib/libpam/openpam_readlinev.c @@ -0,0 +1,155 @@ +/*- + * Copyright (c) 2012 Dag-Erling Smørgrav + * 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. + * 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_readlinev.c 648 2013-03-05 17:54:27Z des $ + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> + +#include <security/pam_appl.h> + +#include "openpam_impl.h" + +#define MIN_WORDV_SIZE 32 + +/* + * OpenPAM extension + * + * Read a line from a file and split it into words. + */ + +char ** +openpam_readlinev(FILE *f, int *lineno, int *lenp) +{ + char *word, **wordv, **tmp; + size_t wordlen, wordvsize; + int ch, serrno, wordvlen; + + wordvsize = MIN_WORDV_SIZE; + wordvlen = 0; + if ((wordv = malloc(wordvsize * sizeof *wordv)) == NULL) { + openpam_log(PAM_LOG_ERROR, "malloc(): %m"); + errno = ENOMEM; + return (NULL); + } + wordv[wordvlen] = NULL; + while ((word = openpam_readword(f, lineno, &wordlen)) != NULL) { + if ((unsigned int)wordvlen + 1 >= wordvsize) { + /* need to expand the array */ + wordvsize *= 2; + tmp = realloc(wordv, wordvsize * sizeof *wordv); + if (tmp == NULL) { + openpam_log(PAM_LOG_ERROR, "malloc(): %m"); + errno = ENOMEM; + break; + } + wordv = tmp; + } + /* insert our word */ + wordv[wordvlen++] = word; + wordv[wordvlen] = NULL; + } + if (errno != 0) { + /* I/O error or out of memory */ + serrno = errno; + while (wordvlen--) + free(wordv[wordvlen]); + free(wordv); + errno = serrno; + return (NULL); + } + /* assert(!ferror(f)) */ + ch = fgetc(f); + /* assert(ch == EOF || ch == '\n') */ + if (ch == EOF && wordvlen == 0) { + free(wordv); + return (NULL); + } + if (ch == '\n' && lineno != NULL) + ++*lineno; + if (lenp != NULL) + *lenp = wordvlen; + return (wordv); +} + +/** + * The =openpam_readlinev function reads a line from a file, splits it + * into words according to the rules described in the =openpam_readword + * manual page, and returns a list of those words. + * + * If =lineno is not =NULL, the integer variable it points to is + * incremented every time a newline character is read. + * This includes quoted or escaped newline characters and the newline + * character at the end of the line. + * + * If =lenp is not =NULL, the number of words on the line is stored in the + * variable to which it points. + * + * RETURN VALUES + * + * If successful, the =openpam_readlinev function returns a pointer to a + * dynamically allocated array of pointers to individual dynamically + * allocated NUL-terminated strings, each containing a single word, in the + * order in which they were encountered on the line. + * The array is terminated by a =NULL pointer. + * + * The caller is responsible for freeing both the array and the individual + * strings by passing each of them to =!free. + * + * If the end of the line was reached before any words were read, + * =openpam_readlinev returns a pointer to a dynamically allocated array + * containing a single =NULL pointer. + * + * The =openpam_readlinev function can fail and return =NULL for one of + * four reasons: + * + * - The end of the file was reached before any words were read; :errno is + * zero, =!ferror returns zero, and =!feof returns a non-zero value. + * + * - The end of the file was reached while a quote or backslash escape + * was in effect; :errno is set to =EINVAL, =!ferror returns zero, and + * =!feof returns a non-zero value. + * + * - An error occurred while reading from the file; :errno is non-zero, + * =!ferror returns a non-zero value and =!feof returns zero. + * + * - A =!malloc or =!realloc call failed; :errno is set to =ENOMEM, + * =!ferror returns a non-zero value, and =!feof may or may not return + * a non-zero value. + * + * >openpam_readline + * >openpam_readword + * + * AUTHOR DES + */ |