add isastream (obsolete STREAMS junk)

apparently some packages see stropts.h and want to be able to use
this. the implementation checks that the file descriptor is valid by
using fcntl/F_GETFD so it can report an error if not (as specified).

diff --git a/include/stropts.h b/include/stropts.h
index 36d84bbba2b6da0d673ce01e7044fd8c6933678c..c99c922e3411bab394e5fce78a3dca98977fc94b 100644 (file)
--- a/include/stropts.h
+++ b/include/stropts.h
@@ -129,7 +129,8 @@ struct str_list {
        struct str_mlist *sl_modlist;
 };
 
-int ioctl (int, int, ...);
+int isastream(int);
+int ioctl(int, int, ...);
 
 #ifdef __cplusplus
 }

diff --git a/src/misc/isastream.c b/src/misc/isastream.c
new file mode 100644 (file)
index 0000000..4dafdb0
--- /dev/null
+++ b/src/misc/isastream.c
@@ -0,0 +1,7 @@
+#include <stropts.h>
+#include <fcntl.h>
+
+int isastream(int fd)
+{
+       return fcntl(fd, F_GETFD) < 0 ? -1 : 0;
+}