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authorMike Frysinger <vapier@gentoo.org>2005-08-18 01:19:45 +0000
committerMike Frysinger <vapier@gentoo.org>2005-08-18 01:19:45 +0000
commit76945fb0934d4a64fcc3e3041a4560ca6f58aa41 (patch)
treee2fef58460246b9a0a00b828fc1fff0e09e2dea3 /libc/inet/rpc
parentfc2d3a34a54e16e9fc9563fcb97b69d1c3dd226f (diff)
add support for getrpcbynumber_r/getrpcbyname_r/getrpcent_r and a config option to enable REENTRANT RPC
Diffstat (limited to 'libc/inet/rpc')
-rw-r--r--libc/inet/rpc/getrpcent.c98
1 files changed, 98 insertions, 0 deletions
diff --git a/libc/inet/rpc/getrpcent.c b/libc/inet/rpc/getrpcent.c
index 5e86cb9c8..b796d856d 100644
--- a/libc/inet/rpc/getrpcent.c
+++ b/libc/inet/rpc/getrpcent.c
@@ -42,6 +42,7 @@
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
+#include <errno.h>
/*
* Internet version.
@@ -250,3 +251,100 @@ static struct rpcent *interpret(register struct rpcdata *d)
*q = NULL;
return &d->rpc;
}
+
+#if defined(__UCLIBC_HAS_REENTRANT_RPC__)
+
+#if defined(__UCLIBC_HAS_THREADS__)
+# include <pthread.h>
+static pthread_mutex_t rpcdata_lock = PTHREAD_MUTEX_INITIALIZER;
+# define LOCK __pthread_mutex_lock(&rpcdata_lock)
+# define UNLOCK __pthread_mutex_unlock(&rpcdata_lock);
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+static int __copy_rpcent(struct rpcent *r, struct rpcent *result_buf, char *buffer,
+ size_t buflen, struct rpcent **result)
+{
+ size_t i, s;
+
+ *result = NULL;
+
+ if (!r)
+ return ENOENT;
+
+ /* copy the struct from the shared mem */
+ memset(result_buf, 0x00, sizeof(*result_buf));
+ memset(buffer, 0x00, buflen);
+
+ result_buf->r_number = r->r_number;
+
+ /* copy the aliases ... need to not only copy the alias strings,
+ * but the array of pointers to the alias strings */
+ i = 0;
+ while (r->r_aliases[i++]) ;
+
+ s = i-- * sizeof(char*);
+ if (buflen < s)
+ goto err_out;
+ result_buf->r_aliases = (char**)buffer;
+ buffer += s;
+ buflen -= s;
+
+ while (i-- > 0) {
+ s = strlen(r->r_aliases[i]) + 1;
+ if (buflen < s)
+ goto err_out;
+ result_buf->r_aliases[i] = buffer;
+ buffer += s;
+ buflen -= s;
+ memcpy(result_buf->r_aliases[i], r->r_aliases[i], s);
+ }
+
+ /* copy the name */
+ i = strlen(r->r_name);
+ if (buflen <= i)
+ goto err_out;
+ result_buf->r_name = buffer;
+ memcpy(result_buf->r_name, r->r_name, i);
+
+ /* that was a hoot eh ? */
+ *result = result_buf;
+
+ return 0;
+err_out:
+ return ERANGE;
+}
+
+int getrpcbynumber_r(int number, struct rpcent *result_buf, char *buffer,
+ size_t buflen, struct rpcent **result)
+{
+ int ret;
+ LOCK;
+ ret = __copy_rpcent(getrpcbynumber(number), result_buf, buffer, buflen, result);
+ UNLOCK;
+ return ret;
+}
+
+int getrpcbyname_r(const char *name, struct rpcent *result_buf, char *buffer,
+ size_t buflen, struct rpcent **result)
+{
+ int ret;
+ LOCK;
+ ret = __copy_rpcent(getrpcbyname(name), result_buf, buffer, buflen, result);
+ UNLOCK;
+ return ret;
+}
+
+int getrpcent_r(struct rpcent *result_buf, char *buffer,
+ size_t buflen, struct rpcent **result)
+{
+ int ret;
+ LOCK;
+ ret = __copy_rpcent(getrpcent(), result_buf, buffer, buflen, result);
+ UNLOCK;
+ return ret;
+}
+
+#endif /* __UCLIBC_HAS_REENTRANT_RPC__ */