Import sources from 2011-03-30 iso image

1 files changed, 65 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/9iounit.c b/sys/src/ape/lib/ap/plan9/9iounit.c
new file mode 100755
index 000000000..7117a9fe0
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/9iounit.c
@@ -0,0 +1,65 @@
+#include "lib.h"
+#include <string.h>
+#include <stdlib.h>
+#include <fmt.h>
+#include "sys9.h"
+#include "dir.h"
+
+/*
+ * Format:
+  3 r  M    4 (0000000000457def 11 00)   8192      512 /rc/lib/rcmain
+ */
+
+static int
+getfields(char *str, char **args, int max, int mflag)
+{
+	char r;
+	int nr, intok, narg;
+
+	if(max <= 0)
+		return 0;
+
+	narg = 0;
+	args[narg] = str;
+	if(!mflag)
+		narg++;
+	intok = 0;
+	for(;;) {
+		r = *str++;
+		if(r == 0)
+			break;
+		if(r == ' ' || r == '\t'){
+			if(narg >= max)
+				break;
+			*str = 0;
+			intok = 0;
+			args[narg] = str + nr;
+			if(!mflag)
+				narg++;
+		} else {
+			if(!intok && mflag)
+				narg++;
+			intok = 1;
+		}
+	}
+	return narg;
+}
+int
+_IOUNIT(int fd)
+{
+	int i, cfd;
+	char buf[128], *args[10];
+
+	snprint(buf, sizeof buf, "#d/%dctl", fd);
+	cfd = _OPEN(buf, OREAD);
+	if(cfd < 0)
+		return 0;
+	i = _READ(cfd, buf, sizeof buf-1);
+	_CLOSE(cfd);
+	if(i <= 0)
+		return 0;
+	buf[i] = '\0';
+	if(getfields(buf, args, 10, 1) != 10)
+		return 0;
+	return atoi(args[7]);
+}