diff options
| -rw-r--r-- | libc/inet/rpc/getrpcent.c | 98 |
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__ */ |