diff --git a/src/utils/os.c b/src/utils/os.c
index e3f1fe2d42bb61d072940949a7ddee345836d4f6..747a3700014bd248f19230bfd0363ccba55437ee 100644 (file)
--- a/src/utils/os.c
+++ b/src/utils/os.c
return strdup(result->pw_name);
} /* sdb_get_current_user */
+int
+sdb_select(int fd, int type)
+{
+ fd_set fds;
+ fd_set *readfds = NULL;
+ fd_set *writefds = NULL;
+ fd_set *exceptfds = NULL;
+
+ if (fd < 0) {
+ errno = EBADF;
+ return -1;
+ }
+
+ FD_ZERO(&fds);
+
+ switch (type) {
+ case SDB_SELECTIN:
+ readfds = &fds;
+ break;
+ case SDB_SELECTOUT:
+ writefds = &fds;
+ break;
+ case SDB_SELECTERR:
+ exceptfds = &fds;
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ FD_SET(fd, &fds);
+
+ while (42) {
+ int n;
+ errno = 0;
+ n = select(fd + 1, readfds, writefds, exceptfds, NULL);
+
+ if ((n < 0) && (errno != EINTR))
+ return n;
+ if (n > 0)
+ break;
+ }
+ return 0;
+} /* sdb_select */
+
+ssize_t
+sdb_write(int fd, size_t msg_len, const void *msg)
+{
+ const char *buf;
+ size_t len;
+
+ if ((fd < 0) || (msg_len && (! msg)))
+ return -1;
+ if (! msg_len)
+ return 0;
+
+ buf = msg;
+ len = msg_len;
+ while (len > 0) {
+ ssize_t status;
+
+ if (sdb_select(fd, SDB_SELECTOUT))
+ return -1;
+
+ errno = 0;
+ status = write(fd, buf, len);
+ if (status < 0) {
+ if ((errno == EAGAIN) || (errno == EWOULDBLOCK))
+ continue;
+ if (errno == EINTR)
+ continue;
+
+ return status;
+ }
+
+ len -= (size_t)status;
+ buf += status;
+ }
+
+ return (ssize_t)msg_len;
+} /* sdb_write */
+
/* vim: set tw=78 sw=4 ts=4 noexpandtab : */