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-rw-r--r--libc/inet/getproto.c170
1 files changed, 99 insertions, 71 deletions
diff --git a/libc/inet/getproto.c b/libc/inet/getproto.c
index e5c6d9068..0f145ead4 100644
--- a/libc/inet/getproto.c
+++ b/libc/inet/getproto.c
@@ -52,6 +52,7 @@
*/
#define __FORCE_GLIBC
+#define _GNU_SOURCE
#include <features.h>
#include <sys/types.h>
#include <sys/socket.h>
@@ -60,6 +61,18 @@
#include <stdlib.h>
#include <string.h>
+#ifdef __UCLIBC_HAS_THREADS__
+#include <pthread.h>
+static pthread_mutex_t mylock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
+# define LOCK pthread_mutex_lock(&mylock)
+# define UNLOCK pthread_mutex_unlock(&mylock);
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+
+
#define MAXALIASES 35
static FILE *protof = NULL;
@@ -70,97 +83,112 @@ static int proto_stayopen;
void setprotoent(int f)
{
- if (protof == NULL)
- protof = fopen(_PATH_PROTOCOLS, "r" );
- else
- rewind(protof);
- proto_stayopen |= f;
+ LOCK;
+ if (protof == NULL)
+ protof = fopen(_PATH_PROTOCOLS, "r" );
+ else
+ rewind(protof);
+ proto_stayopen |= f;
+ UNLOCK;
}
void endprotoent(void)
{
- if (protof) {
- fclose(protof);
- protof = NULL;
- }
- proto_stayopen = 0;
+ LOCK;
+ if (protof) {
+ fclose(protof);
+ protof = NULL;
+ }
+ proto_stayopen = 0;
+ UNLOCK;
}
struct protoent * getprotoent(void)
{
- char *p;
- register char *cp, **q;
+ char *p;
+ register char *cp, **q;
- if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL)
- return (NULL);
+ LOCK;
+ if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) {
+ UNLOCK;
+ return (NULL);
+ }
again:
- if ((p = fgets(line, BUFSIZ, protof)) == NULL)
- return (NULL);
- if (*p == '#')
- goto again;
- cp = strpbrk(p, "#\n");
- if (cp == NULL)
- goto again;
- *cp = '\0';
- proto.p_name = p;
- cp = strpbrk(p, " \t");
- if (cp == NULL)
- goto again;
- *cp++ = '\0';
- while (*cp == ' ' || *cp == '\t')
+ if ((p = fgets(line, BUFSIZ, protof)) == NULL) {
+ UNLOCK;
+ return (NULL);
+ }
+
+ if (*p == '#')
+ goto again;
+ cp = strpbrk(p, "#\n");
+ if (cp == NULL)
+ goto again;
+ *cp = '\0';
+ proto.p_name = p;
+ cp = strpbrk(p, " \t");
+ if (cp == NULL)
+ goto again;
+ *cp++ = '\0';
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ p = strpbrk(cp, " \t");
+ if (p != NULL)
+ *p++ = '\0';
+ proto.p_proto = atoi(cp);
+ q = proto.p_aliases = proto_aliases;
+ if (p != NULL) {
+ cp = p;
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
cp++;
- p = strpbrk(cp, " \t");
- if (p != NULL)
- *p++ = '\0';
- proto.p_proto = atoi(cp);
- q = proto.p_aliases = proto_aliases;
- if (p != NULL) {
- cp = p;
- while (cp && *cp) {
- if (*cp == ' ' || *cp == '\t') {
- cp++;
- continue;
- }
- if (q < &proto_aliases[MAXALIASES - 1])
- *q++ = cp;
- cp = strpbrk(cp, " \t");
- if (cp != NULL)
- *cp++ = '\0';
- }
+ continue;
+ }
+ if (q < &proto_aliases[MAXALIASES - 1])
+ *q++ = cp;
+ cp = strpbrk(cp, " \t");
+ if (cp != NULL)
+ *cp++ = '\0';
}
- *q = NULL;
- return (&proto);
+ }
+ *q = NULL;
+ UNLOCK;
+ return (&proto);
}
struct protoent * getprotobyname(const char *name)
{
- register struct protoent *p;
- register char **cp;
-
- setprotoent(proto_stayopen);
- while ((p = getprotoent()) != NULL) {
- if (strcmp(p->p_name, name) == 0)
- break;
- for (cp = p->p_aliases; *cp != 0; cp++)
- if (strcmp(*cp, name) == 0)
- goto found;
- }
+ register struct protoent *p;
+ register char **cp;
+
+ LOCK;
+ setprotoent(proto_stayopen);
+ while ((p = getprotoent()) != NULL) {
+ if (strcmp(p->p_name, name) == 0)
+ break;
+ for (cp = p->p_aliases; *cp != 0; cp++)
+ if (strcmp(*cp, name) == 0)
+ goto found;
+ }
found:
- if (!proto_stayopen)
- endprotoent();
- return (p);
+ if (!proto_stayopen)
+ endprotoent();
+ UNLOCK;
+ return (p);
}
struct protoent * getprotobynumber(int proto)
{
- register struct protoent *p;
-
- setprotoent(proto_stayopen);
- while ((p = getprotoent()) != NULL)
- if (p->p_proto == proto)
- break;
- if (!proto_stayopen)
- endprotoent();
- return (p);
+ register struct protoent *p;
+
+ LOCK;
+ setprotoent(proto_stayopen);
+ while ((p = getprotoent()) != NULL)
+ if (p->p_proto == proto)
+ break;
+ if (!proto_stayopen)
+ endprotoent();
+ UNLOCK;
+ return (p);
}