1/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <ctype.h>
19#include <errno.h>
20#include <stdio.h>
21#include <pwd.h>
22
23#define flockfile(s) _IO_flockfile (s)
24#define funlockfile(s) _IO_funlockfile (s)
25
26/* Define a line parsing function using the common code
27 used in the nss_files module. */
28
29#define STRUCTURE passwd
30#define ENTNAME pwent
31struct pwent_data {};
32
33#include <nss/nss_files/files-parse.c>
34LINE_PARSER
35(,
36 STRING_FIELD (result->pw_name, ISCOLON, 0);
37 if (line[0] == '\0'
38 && (result->pw_name[0] == '+' || result->pw_name[0] == '-'))
39 {
40 /* This a special case. We allow lines containing only a `+' sign
41 since this is used for nss_compat. All other services will
42 reject this entry later. Initialize all other fields now. */
43 result->pw_passwd = NULL;
44 result->pw_uid = 0;
45 result->pw_gid = 0;
46 result->pw_gecos = NULL;
47 result->pw_dir = NULL;
48 result->pw_shell = NULL;
49 }
50 else
51 {
52 STRING_FIELD (result->pw_passwd, ISCOLON, 0);
53 if (result->pw_name[0] == '+' || result->pw_name[0] == '-')
54 {
55 INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0)
56 INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0)
57 }
58 else
59 {
60 INT_FIELD (result->pw_uid, ISCOLON, 0, 10,)
61 INT_FIELD (result->pw_gid, ISCOLON, 0, 10,)
62 }
63 STRING_FIELD (result->pw_gecos, ISCOLON, 0);
64 STRING_FIELD (result->pw_dir, ISCOLON, 0);
65 result->pw_shell = line;
66 }
67 )
68
69
70/* Read one entry from the given stream. */
71int
72__fgetpwent_r (FILE *stream, struct passwd *resbuf, char *buffer,
73 size_t buflen, struct passwd **result)
74{
75 char *p;
76
77 flockfile (stream);
78 do
79 {
80 buffer[buflen - 1] = '\xff';
81 p = fgets_unlocked (buffer, buflen, stream);
82 if (p == NULL && feof_unlocked (stream))
83 {
84 funlockfile (stream);
85 *result = NULL;
86 __set_errno (ENOENT);
87 return errno;
88 }
89 if (p == NULL || buffer[buflen - 1] != '\xff')
90 {
91 funlockfile (stream);
92 *result = NULL;
93 __set_errno (ERANGE);
94 return errno;
95 }
96
97 /* Skip leading blanks. */
98 while (isspace (*p))
99 ++p;
100 } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */
101 /* Parse the line. If it is invalid, loop to
102 get the next line of the file to parse. */
103 ! parse_line (p, resbuf, (void *) buffer, buflen, &errno));
104
105 funlockfile (stream);
106
107 *result = resbuf;
108 return 0;
109}
110weak_alias (__fgetpwent_r, fgetpwent_r)
111