add directory bin

bin/uname.c

@@ -0,0 +1,72 @@
+/*
+ * uname - print system information. Jeff Comstock - Bloomington, MN USA 1992
+ * Usage: uname [-asnrvm]
+ * -s prints system name
+ * -n prints nodename
+ * -r prints software release
+ * -v prints os version
+ * -m prints machine name
+ * -a prinst all the above information 
+*/
+#include <stdio.h>
+#include <getopt.h>
+#include <unistd.h>
+
+#define SYSNAME 	0
+#define NODENAME 	1
+#define RELEASE 	2
+#define VERSION 	3
+#define MACHINE 	4
+
+struct utsname u;
+
+struct utstab {
+	char *str;
+	int requested;
+} uttab[] = {
+	{ u.sysname, 	0 },
+	{ u.nodename, 	0 },
+	{ u.release, 	0 },
+	{ u.version, 	0 },
+	{ u.machine, 	0 }
+};	
+
+main(int argc, char **argv) {
+char *opts="amnrsv";
+register int c,space, all=0;
+
+	if ( ! uname(&u) ) {
+		if ( argc == 1 ) {
+			puts(u.sysname);
+		} else {
+			while ( (c = getopt(argc,argv,opts)) != -1 ) {
+					switch ( c ) {
+					case 'a' : all++;
+						break;
+					case 'm' : uttab[MACHINE].requested++;
+						break;
+					case 'n' : uttab[NODENAME].requested++;
+						break;
+					case 'r' : uttab[RELEASE].requested++;
+						break;
+					case 's' : uttab[SYSNAME].requested++;
+						break;
+					case 'v' : uttab[VERSION].requested++;
+						break;
+				}
+			}
+			space=0;
+			for(c=0; c <= MACHINE; c++) {
+				if ( uttab[c].requested || all ) {
+					if ( space )
+						putchar(' ');
+					printf("%s", uttab[c].str); 
+					space++;
+				}
+			}
+			puts("");
+		}
+	}
+	else
+		perror("uname");
+}