2 ** protocols.c /etc/protocols access functions
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56 #include <sys/types.h>
57 #include <sys/socket.h>
66 #include <bits/uClibc_mutex.h>
67 __UCLIBC_MUTEX_STATIC(mylock, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP);
72 #define SBUFSIZE (BUFSIZ + 1 + (sizeof(char *) * MAXALIASES))
74 static FILE *protof = NULL;
75 static struct protoent proto;
76 static char *static_aliases = NULL;
77 static smallint proto_stayopen;
79 static void __initbuf(void)
81 if (!static_aliases) {
82 static_aliases = malloc(SBUFSIZE);
88 void setprotoent(int f)
90 __UCLIBC_MUTEX_LOCK(mylock);
92 protof = fopen(_PATH_PROTOCOLS, "r" );
95 if (f) proto_stayopen = 1;
96 __UCLIBC_MUTEX_UNLOCK(mylock);
98 libc_hidden_def(setprotoent)
100 void endprotoent(void)
102 __UCLIBC_MUTEX_LOCK(mylock);
108 __UCLIBC_MUTEX_UNLOCK(mylock);
110 libc_hidden_def(endprotoent)
112 int getprotoent_r(struct protoent *result_buf,
113 char *buf, size_t buflen,
114 struct protoent **result)
117 register char *cp, **q;
118 char **proto_aliases;
124 if (buflen < sizeof(*proto_aliases)*MAXALIASES) {
128 __UCLIBC_MUTEX_LOCK(mylock);
129 proto_aliases=(char **)buf;
130 buf+=sizeof(*proto_aliases)*MAXALIASES;
131 buflen-=sizeof(*proto_aliases)*MAXALIASES;
133 if (buflen < BUFSIZ+1) {
141 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) {
146 if ((p = fgets(line, BUFSIZ, protof)) == NULL) {
153 cp = strpbrk(p, "#\n");
157 result_buf->p_name = p;
158 cp = strpbrk(p, " \t");
162 while (*cp == ' ' || *cp == '\t')
164 p = strpbrk(cp, " \t");
167 result_buf->p_proto = atoi(cp);
168 q = result_buf->p_aliases = proto_aliases;
172 if (*cp == ' ' || *cp == '\t') {
176 if (q < &proto_aliases[MAXALIASES - 1])
178 cp = strpbrk(cp, " \t");
187 __UCLIBC_MUTEX_UNLOCK(mylock);
190 libc_hidden_def(getprotoent_r)
192 struct protoent * getprotoent(void)
194 struct protoent *result;
197 getprotoent_r(&proto, static_aliases, SBUFSIZE, &result);
202 int getprotobyname_r(const char *name,
203 struct protoent *result_buf,
204 char *buf, size_t buflen,
205 struct protoent **result)
210 __UCLIBC_MUTEX_LOCK(mylock);
211 setprotoent(proto_stayopen);
212 while (!(ret=getprotoent_r(result_buf, buf, buflen, result))) {
213 if (strcmp(result_buf->p_name, name) == 0)
215 for (cp = result_buf->p_aliases; *cp != 0; cp++)
216 if (strcmp(*cp, name) == 0)
222 __UCLIBC_MUTEX_UNLOCK(mylock);
223 return *result?0:ret;
225 libc_hidden_def(getprotobyname_r)
228 struct protoent * getprotobyname(const char *name)
230 struct protoent *result;
233 getprotobyname_r(name, &proto, static_aliases, SBUFSIZE, &result);
238 int getprotobynumber_r (int proto_num,
239 struct protoent *result_buf,
240 char *buf, size_t buflen,
241 struct protoent **result)
245 __UCLIBC_MUTEX_LOCK(mylock);
246 setprotoent(proto_stayopen);
247 while (!(ret=getprotoent_r(result_buf, buf, buflen, result)))
248 if (result_buf->p_proto == proto_num)
252 __UCLIBC_MUTEX_UNLOCK(mylock);
253 return *result?0:ret;
255 libc_hidden_def(getprotobynumber_r)
257 struct protoent * getprotobynumber(int proto_num)
259 struct protoent *result;
262 getprotobynumber_r(proto_num, &proto, static_aliases,