diff options
Diffstat (limited to 'libpwdgrp/__getgrent.c')
-rw-r--r-- | libpwdgrp/__getgrent.c | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/libpwdgrp/__getgrent.c b/libpwdgrp/__getgrent.c deleted file mode 100644 index 3b54b9eec..000000000 --- a/libpwdgrp/__getgrent.c +++ /dev/null | |||
@@ -1,203 +0,0 @@ | |||
1 | /* | ||
2 | * __getgrent.c - This file is part of the libc-8086/grp package for ELKS, | ||
3 | * Copyright (C) 1995, 1996 Nat Friedman <ndf@linux.mit.edu>. | ||
4 | * | ||
5 | * This library is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU Library General Public | ||
7 | * License as published by the Free Software Foundation; either | ||
8 | * version 2 of the License, or (at your option) any later version. | ||
9 | * | ||
10 | * This library is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | * Library General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU Library General Public | ||
16 | * License along with this library; if not, write to the Free | ||
17 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
18 | * | ||
19 | */ | ||
20 | |||
21 | #include <unistd.h> | ||
22 | #include <stdlib.h> | ||
23 | #include <string.h> | ||
24 | |||
25 | #include "busybox.h" | ||
26 | #include "grp_.h" | ||
27 | |||
28 | /* | ||
29 | * Define GR_SCALE_DYNAMIC if you want grp to dynamically scale its read buffer | ||
30 | * so that lines of any length can be used. On very very small systems, | ||
31 | * you may want to leave this undefined because it will make the grp functions | ||
32 | * somewhat larger (because of the inclusion of malloc and the code necessary). | ||
33 | * On larger systems, you will want to define this, because grp will _not_ | ||
34 | * deal with long lines gracefully (they will be skipped). | ||
35 | */ | ||
36 | #undef GR_SCALE_DYNAMIC | ||
37 | |||
38 | #ifndef GR_SCALE_DYNAMIC | ||
39 | /* | ||
40 | * If scaling is not dynamic, the buffers will be statically allocated, and | ||
41 | * maximums must be chosen. GR_MAX_LINE_LEN is the maximum number of | ||
42 | * characters per line in the group file. GR_MAX_MEMBERS is the maximum | ||
43 | * number of members of any given group. | ||
44 | */ | ||
45 | #define GR_MAX_LINE_LEN 128 | ||
46 | /* GR_MAX_MEMBERS = (GR_MAX_LINE_LEN-(24+3+6))/9 */ | ||
47 | #define GR_MAX_MEMBERS 11 | ||
48 | |||
49 | #endif /* !GR_SCALE_DYNAMIC */ | ||
50 | |||
51 | |||
52 | /* | ||
53 | * Define GR_DYNAMIC_GROUP_LIST to make initgroups() dynamically allocate | ||
54 | * space for it's GID array before calling setgroups(). This is probably | ||
55 | * unnecessary scalage, so it's undefined by default. | ||
56 | */ | ||
57 | #undef GR_DYNAMIC_GROUP_LIST | ||
58 | |||
59 | #ifndef GR_DYNAMIC_GROUP_LIST | ||
60 | /* | ||
61 | * GR_MAX_GROUPS is the size of the static array initgroups() uses for | ||
62 | * its static GID array if GR_DYNAMIC_GROUP_LIST isn't defined. | ||
63 | */ | ||
64 | #define GR_MAX_GROUPS 64 | ||
65 | |||
66 | #endif /* !GR_DYNAMIC_GROUP_LIST */ | ||
67 | |||
68 | |||
69 | /* | ||
70 | * This is the core group-file read function. It behaves exactly like | ||
71 | * getgrent() except that it is passed a file descriptor. getgrent() | ||
72 | * is just a wrapper for this function. | ||
73 | */ | ||
74 | struct group *bb_getgrent(int grp_fd) | ||
75 | { | ||
76 | #ifndef GR_SCALE_DYNAMIC | ||
77 | static char line_buff[GR_MAX_LINE_LEN]; | ||
78 | static char *members[GR_MAX_MEMBERS]; | ||
79 | #else | ||
80 | static char *line_buff = NULL; | ||
81 | static char **members = NULL; | ||
82 | short line_index; | ||
83 | short buff_size; | ||
84 | #endif | ||
85 | static struct group group; | ||
86 | register char *ptr; | ||
87 | char *field_begin; | ||
88 | short member_num; | ||
89 | char *endptr; | ||
90 | int line_len; | ||
91 | |||
92 | |||
93 | /* We use the restart label to handle malformatted lines */ | ||
94 | restart: | ||
95 | #ifdef GR_SCALE_DYNAMIC | ||
96 | line_index = 0; | ||
97 | buff_size = 256; | ||
98 | #endif | ||
99 | |||
100 | #ifndef GR_SCALE_DYNAMIC | ||
101 | /* Read the line into the static buffer */ | ||
102 | if ((line_len = read(grp_fd, line_buff, GR_MAX_LINE_LEN)) <= 0) | ||
103 | return NULL; | ||
104 | field_begin = strchr(line_buff, '\n'); | ||
105 | if (field_begin != NULL) | ||
106 | lseek(grp_fd, (long) (1 + field_begin - (line_buff + line_len)), | ||
107 | SEEK_CUR); | ||
108 | else { /* The line is too long - skip it :-\ */ | ||
109 | |||
110 | do { | ||
111 | if ((line_len = read(grp_fd, line_buff, GR_MAX_LINE_LEN)) <= 0) | ||
112 | return NULL; | ||
113 | } while (!(field_begin = strchr(line_buff, '\n'))); | ||
114 | lseek(grp_fd, (long) ((field_begin - line_buff) - line_len + 1), | ||
115 | SEEK_CUR); | ||
116 | goto restart; | ||
117 | } | ||
118 | if (*line_buff == '#' || *line_buff == ' ' || *line_buff == '\n' || | ||
119 | *line_buff == '\t') | ||
120 | goto restart; | ||
121 | *field_begin = '\0'; | ||
122 | |||
123 | #else /* !GR_SCALE_DYNAMIC */ | ||
124 | line_buff = realloc(line_buff, buff_size); | ||
125 | while (1) { | ||
126 | if ((line_len = read(grp_fd, line_buff + line_index, | ||
127 | buff_size - line_index)) <= 0) | ||
128 | return NULL; | ||
129 | field_begin = strchr(line_buff, '\n'); | ||
130 | if (field_begin != NULL) { | ||
131 | lseek(grp_fd, | ||
132 | (long) (1 + field_begin - | ||
133 | (line_len + line_index + line_buff)), SEEK_CUR); | ||
134 | *field_begin = '\0'; | ||
135 | if (*line_buff == '#' || *line_buff == ' ' | ||
136 | || *line_buff == '\n' || *line_buff == '\t') | ||
137 | goto restart; | ||
138 | break; | ||
139 | } else { /* Allocate some more space */ | ||
140 | |||
141 | line_index = buff_size; | ||
142 | buff_size += 256; | ||
143 | line_buff = realloc(line_buff, buff_size); | ||
144 | } | ||
145 | } | ||
146 | #endif /* GR_SCALE_DYNAMIC */ | ||
147 | |||
148 | /* Now parse the line */ | ||
149 | group.gr_name = line_buff; | ||
150 | ptr = strchr(line_buff, ':'); | ||
151 | if (ptr == NULL) | ||
152 | goto restart; | ||
153 | *ptr++ = '\0'; | ||
154 | |||
155 | group.gr_passwd = ptr; | ||
156 | ptr = strchr(ptr, ':'); | ||
157 | if (ptr == NULL) | ||
158 | goto restart; | ||
159 | *ptr++ = '\0'; | ||
160 | |||
161 | field_begin = ptr; | ||
162 | ptr = strchr(ptr, ':'); | ||
163 | if (ptr == NULL) | ||
164 | goto restart; | ||
165 | *ptr++ = '\0'; | ||
166 | |||
167 | group.gr_gid = (gid_t) strtoul(field_begin, &endptr, 10); | ||
168 | if (*endptr != '\0') | ||
169 | goto restart; | ||
170 | |||
171 | member_num = 0; | ||
172 | field_begin = ptr; | ||
173 | |||
174 | #ifndef GR_SCALE_DYNAMIC | ||
175 | while ((ptr = strchr(ptr, ',')) != NULL) { | ||
176 | *ptr = '\0'; | ||
177 | ptr++; | ||
178 | members[member_num] = field_begin; | ||
179 | field_begin = ptr; | ||
180 | member_num++; | ||
181 | } | ||
182 | if (*field_begin == '\0') | ||
183 | members[member_num] = NULL; | ||
184 | else { | ||
185 | members[member_num] = field_begin; | ||
186 | members[member_num + 1] = NULL; | ||
187 | } | ||
188 | #else /* !GR_SCALE_DYNAMIC */ | ||
189 | free(members); | ||
190 | members = (char **) malloc((member_num + 1) * sizeof(char *)); | ||
191 | for ( ; field_begin && *field_begin != '\0'; field_begin = ptr) { | ||
192 | if ((ptr = strchr(field_begin, ',')) != NULL) | ||
193 | *ptr++ = '\0'; | ||
194 | members[member_num++] = field_begin; | ||
195 | members = (char **) realloc(members, | ||
196 | (member_num + 1) * sizeof(char *)); | ||
197 | } | ||
198 | members[member_num] = NULL; | ||
199 | #endif /* GR_SCALE_DYNAMIC */ | ||
200 | |||
201 | group.gr_mem = members; | ||
202 | return &group; | ||
203 | } | ||