1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
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
*/
|
