1 /*
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1998-1999 by Internet Software Consortium.
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #if defined(LIBC_SCCS) && !defined(lint)
19 static const char rcsid[] = "$Id: getservent_r.c,v 1.6 2006/08/01 01:14:16 marka Exp $";
20 #endif /* LIBC_SCCS and not lint */
21
22 #include <port_before.h>
23 #if !defined(_REENTRANT) || !defined(DO_PTHREADS)
24 static int getservent_r_not_required = 0;
25 #else
26 #include <errno.h>
27 #include <string.h>
28 #include <stdio.h>
29 #include <sys/types.h>
30 #include <netinet/in.h>
31 #include <netdb.h>
32 #include <sys/param.h>
33 #include <port_after.h>
34
35 #ifdef SERV_R_RETURN
36
37 static SERV_R_RETURN
38 copy_servent(struct servent *, struct servent *, SERV_R_COPY_ARGS);
39
40 SERV_R_RETURN
getservbyname_r(const char * name,const char * proto,struct servent * sptr,SERV_R_ARGS)41 getservbyname_r(const char *name, const char *proto,
42 struct servent *sptr, SERV_R_ARGS) {
43 struct servent *se = getservbyname(name, proto);
44 #ifdef SERV_R_SETANSWER
45 int n = 0;
46
47 if (se == NULL || (n = copy_servent(se, sptr, SERV_R_COPY)) != 0)
48 *answerp = NULL;
49 else
50 *answerp = sptr;
51
52 return (n);
53 #else
54 if (se == NULL)
55 return (SERV_R_BAD);
56
57 return (copy_servent(se, sptr, SERV_R_COPY));
58 #endif
59 }
60
61 SERV_R_RETURN
getservbyport_r(int port,const char * proto,struct servent * sptr,SERV_R_ARGS)62 getservbyport_r(int port, const char *proto,
63 struct servent *sptr, SERV_R_ARGS) {
64 struct servent *se = getservbyport(port, proto);
65 #ifdef SERV_R_SETANSWER
66 int n = 0;
67
68 if (se == NULL || (n = copy_servent(se, sptr, SERV_R_COPY)) != 0)
69 *answerp = NULL;
70 else
71 *answerp = sptr;
72
73 return (n);
74 #else
75 if (se == NULL)
76 return (SERV_R_BAD);
77
78 return (copy_servent(se, sptr, SERV_R_COPY));
79 #endif
80 }
81
82 /*%
83 * These assume a single context is in operation per thread.
84 * If this is not the case we will need to call irs directly
85 * rather than through the base functions.
86 */
87
88 SERV_R_RETURN
getservent_r(struct servent * sptr,SERV_R_ARGS)89 getservent_r(struct servent *sptr, SERV_R_ARGS) {
90 struct servent *se = getservent();
91 #ifdef SERV_R_SETANSWER
92 int n = 0;
93
94 if (se == NULL || (n = copy_servent(se, sptr, SERV_R_COPY)) != 0)
95 *answerp = NULL;
96 else
97 *answerp = sptr;
98
99 return (n);
100 #else
101 if (se == NULL)
102 return (SERV_R_BAD);
103
104 return (copy_servent(se, sptr, SERV_R_COPY));
105 #endif
106 }
107
108 SERV_R_SET_RETURN
109 #ifdef SERV_R_ENT_ARGS
setservent_r(int stay_open,SERV_R_ENT_ARGS)110 setservent_r(int stay_open, SERV_R_ENT_ARGS)
111 #else
112 setservent_r(int stay_open)
113 #endif
114 {
115 #ifdef SERV_R_ENT_UNUSED
116 SERV_R_ENT_UNUSED;
117 #endif
118 setservent(stay_open);
119 #ifdef SERV_R_SET_RESULT
120 return (SERV_R_SET_RESULT);
121 #endif
122 }
123
124 SERV_R_END_RETURN
125 #ifdef SERV_R_ENT_ARGS
endservent_r(SERV_R_ENT_ARGS)126 endservent_r(SERV_R_ENT_ARGS)
127 #else
128 endservent_r()
129 #endif
130 {
131 #ifdef SERV_R_ENT_UNUSED
132 SERV_R_ENT_UNUSED;
133 #endif
134 endservent();
135 SERV_R_END_RESULT(SERV_R_OK);
136 }
137
138 /* Private */
139
140 #ifndef SERVENT_DATA
141 static SERV_R_RETURN
copy_servent(struct servent * se,struct servent * sptr,SERV_R_COPY_ARGS)142 copy_servent(struct servent *se, struct servent *sptr, SERV_R_COPY_ARGS) {
143 char *cp;
144 int i, n;
145 int numptr, len;
146
147 /* Find out the amount of space required to store the answer. */
148 numptr = 1; /*%< NULL ptr */
149 len = (char *)ALIGN(buf) - buf;
150 for (i = 0; se->s_aliases[i]; i++, numptr++) {
151 len += strlen(se->s_aliases[i]) + 1;
152 }
153 len += strlen(se->s_name) + 1;
154 len += strlen(se->s_proto) + 1;
155 len += numptr * sizeof(char*);
156
157 if (len > (int)buflen) {
158 errno = ERANGE;
159 return (SERV_R_BAD);
160 }
161
162 /* copy port value */
163 sptr->s_port = se->s_port;
164
165 cp = (char *)ALIGN(buf) + numptr * sizeof(char *);
166
167 /* copy official name */
168 n = strlen(se->s_name) + 1;
169 strcpy(cp, se->s_name);
170 sptr->s_name = cp;
171 cp += n;
172
173 /* copy aliases */
174 sptr->s_aliases = (char **)ALIGN(buf);
175 for (i = 0 ; se->s_aliases[i]; i++) {
176 n = strlen(se->s_aliases[i]) + 1;
177 strcpy(cp, se->s_aliases[i]);
178 sptr->s_aliases[i] = cp;
179 cp += n;
180 }
181 sptr->s_aliases[i] = NULL;
182
183 /* copy proto */
184 n = strlen(se->s_proto) + 1;
185 strcpy(cp, se->s_proto);
186 sptr->s_proto = cp;
187 cp += n;
188
189 return (SERV_R_OK);
190 }
191 #else /* !SERVENT_DATA */
192 static int
copy_servent(struct servent * se,struct servent * sptr,SERV_R_COPY_ARGS)193 copy_servent(struct servent *se, struct servent *sptr, SERV_R_COPY_ARGS) {
194 char *cp, *eob;
195 int i, n;
196
197 /* copy port value */
198 sptr->s_port = se->s_port;
199
200 /* copy official name */
201 cp = sdptr->line;
202 eob = sdptr->line + sizeof(sdptr->line);
203 if ((n = strlen(se->s_name) + 1) < (eob - cp)) {
204 strcpy(cp, se->s_name);
205 sptr->s_name = cp;
206 cp += n;
207 } else {
208 return (-1);
209 }
210
211 /* copy aliases */
212 i = 0;
213 sptr->s_aliases = sdptr->serv_aliases;
214 while (se->s_aliases[i] && i < (_MAXALIASES-1)) {
215 if ((n = strlen(se->s_aliases[i]) + 1) < (eob - cp)) {
216 strcpy(cp, se->s_aliases[i]);
217 sptr->s_aliases[i] = cp;
218 cp += n;
219 } else {
220 break;
221 }
222 i++;
223 }
224 sptr->s_aliases[i] = NULL;
225
226 /* copy proto */
227 if ((n = strlen(se->s_proto) + 1) < (eob - cp)) {
228 strcpy(cp, se->s_proto);
229 sptr->s_proto = cp;
230 cp += n;
231 } else {
232 return (-1);
233 }
234
235 return (SERV_R_OK);
236 }
237 #endif /* !SERVENT_DATA */
238 #else /*SERV_R_RETURN */
239 static int getservent_r_unknown_system = 0;
240 #endif /*SERV_R_RETURN */
241 #endif /* !defined(_REENTRANT) || !defined(DO_PTHREADS) */
242 /*! \file */
243