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Diffstat (limited to 'libc/inet/getnetent.c')
-rw-r--r--libc/inet/getnetent.c160
1 files changed, 88 insertions, 72 deletions
diff --git a/libc/inet/getnetent.c b/libc/inet/getnetent.c
index 39aab1a97..0b4c36dcb 100644
--- a/libc/inet/getnetent.c
+++ b/libc/inet/getnetent.c
@@ -21,98 +21,114 @@
#include <netdb.h>
#include <arpa/inet.h>
-#define MAXALIASES 35
+#ifdef __UCLIBC_HAS_THREADS__
+#include <pthread.h>
+static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+# define LOCK pthread_mutex_lock(&mylock)
+# define UNLOCK pthread_mutex_unlock(&mylock);
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+
+
+#define MAXALIASES 35
static const char NETDB[] = _PATH_NETWORKS;
static FILE *netf = NULL;
static char line[BUFSIZ+1];
static struct netent net;
static char *net_aliases[MAXALIASES];
-static char *any(char *, char *);
int _net_stayopen;
-void
-setnetent(f)
- int f;
+void setnetent(int f)
{
- if (netf == NULL)
- netf = fopen(NETDB, "r" );
- else
- rewind(netf);
- _net_stayopen |= f;
+ LOCK;
+ if (netf == NULL)
+ netf = fopen(NETDB, "r" );
+ else
+ rewind(netf);
+ _net_stayopen |= f;
+ UNLOCK;
+ return;
}
-void
-endnetent()
+void endnetent(void)
{
- if (netf) {
- fclose(netf);
- netf = NULL;
- }
- _net_stayopen = 0;
+ LOCK;
+ if (netf) {
+ fclose(netf);
+ netf = NULL;
+ }
+ _net_stayopen = 0;
+ UNLOCK;
}
-struct netent *
-getnetent()
+static char * any(register char *cp, char *match)
{
- char *p;
- register char *cp, **q;
+ register char *mp, c;
- if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL)
- return (NULL);
-again:
- p = fgets(line, BUFSIZ, netf);
- if (p == NULL)
- return (NULL);
- if (*p == '#')
- goto again;
- cp = any(p, "#\n");
- if (cp == NULL)
- goto again;
- *cp = '\0';
- net.n_name = p;
- cp = any(p, " \t");
- if (cp == NULL)
- goto again;
- *cp++ = '\0';
- while (*cp == ' ' || *cp == '\t')
- cp++;
- p = any(cp, " \t");
- if (p != NULL)
- *p++ = '\0';
- net.n_net = inet_network(cp);
- net.n_addrtype = AF_INET;
- q = net.n_aliases = net_aliases;
- if (p != NULL)
- cp = p;
- while (cp && *cp) {
- if (*cp == ' ' || *cp == '\t') {
- cp++;
- continue;
- }
- if (q < &net_aliases[MAXALIASES - 1])
- *q++ = cp;
- cp = any(cp, " \t");
- if (cp != NULL)
- *cp++ = '\0';
- }
- *q = NULL;
- return (&net);
+ while ((c = *cp)) {
+ for (mp = match; *mp; mp++)
+ if (*mp == c)
+ return (cp);
+ cp++;
+ }
+ return ((char *)0);
}
-static char *
-any(cp, match)
- register char *cp;
- char *match;
+struct netent * getnetent(void)
{
- register char *mp, c;
+ char *p;
+ register char *cp, **q;
- while ((c = *cp)) {
- for (mp = match; *mp; mp++)
- if (*mp == c)
- return (cp);
- cp++;
+ LOCK;
+ if (netf == NULL && (netf = fopen(NETDB, "r" )) == NULL) {
+ UNLOCK;
+ return (NULL);
+ }
+again:
+ p = fgets(line, BUFSIZ, netf);
+ if (p == NULL) {
+ UNLOCK;
+ return (NULL);
+ }
+ if (*p == '#')
+ goto again;
+ cp = any(p, "#\n");
+ if (cp == NULL)
+ goto again;
+ *cp = '\0';
+ net.n_name = p;
+ cp = any(p, " \t");
+ if (cp == NULL)
+ goto again;
+ *cp++ = '\0';
+ while (*cp == ' ' || *cp == '\t')
+ cp++;
+ p = any(cp, " \t");
+ if (p != NULL)
+ *p++ = '\0';
+ net.n_net = inet_network(cp);
+ net.n_addrtype = AF_INET;
+ q = net.n_aliases = net_aliases;
+ if (p != NULL)
+ cp = p;
+ while (cp && *cp) {
+ if (*cp == ' ' || *cp == '\t') {
+ cp++;
+ continue;
}
- return ((char *)0);
+ if (q < &net_aliases[MAXALIASES - 1])
+ *q++ = cp;
+ cp = any(cp, " \t");
+ if (cp != NULL)
+ *cp++ = '\0';
+ }
+ *q = NULL;
+ UNLOCK;
+ return (&net);
}
+