1 files changed, 90 insertions, 0 deletions
diff --git a/contrib/top/getopt.c b/contrib/top/getopt.c
new file mode 100644
index 0000000..e6afaaa
--- /dev/null
+++ b/contrib/top/getopt.c
@@ -0,0 +1,90 @@
+/*
+ * "getopt" routine customized for top.
+ */
+
+/*
+ * Many modern-day Unix implementations already have this function
+ * in libc.  The standard "getopt" is perfectly sufficient for top's
+ * needs.  If such a function exists in libc then you certainly don't
+ * need to compile this one in.  To prevent this function from being 
+ * compiled, define "HAVE_GETOPT".  This is usually done in the "CFLAGS"
+ * line of the corresponding machine module.
+ */
+
+/*
+ * This empty declaration exists solely to placate overexhuberant C
+ * compilers that like to warn you about content-free files.
+ */
+static void __empty();
+
+#ifndef HAVE_GETOPT
+
+/*LINTLIBRARY*/
+
+#include "os.h"
+#ifndef NULL
+#define NULL	0
+#endif
+#ifndef EOF
+#define EOF	(-1)
+#endif
+#define ERR(s, c)	if(opterr){\
+	extern int write();\
+	char errbuf[2];\
+	errbuf[0] = c; errbuf[1] = '\n';\
+	(void) write(2, argv[0], strlen(argv[0]));\
+	(void) write(2, s, strlen(s));\
+	(void) write(2, errbuf, 2);}
+
+
+int	opterr = 1;
+int	optind = 1;
+int	optopt;
+char	*optarg;
+
+int
+getopt(argc, argv, opts)
+int	argc;
+char	**argv, *opts;
+{
+	static int sp = 1;
+	register int c;
+	register char *cp;
+
+	if(sp == 1)
+		if(optind >= argc ||
+		   argv[optind][0] != '-' || argv[optind][1] == '\0')
+			return(EOF);
+		else if(strcmp(argv[optind], "--") == 0) {
+			optind++;
+			return(EOF);
+		}
+	optopt = c = argv[optind][sp];
+	if(c == ':' || (cp=strchr(opts, c)) == NULL) {
+		ERR(": unknown option, -", c);
+		if(argv[optind][++sp] == '\0') {
+			optind++;
+			sp = 1;
+		}
+		return('?');
+	}
+	if(*++cp == ':') {
+		if(argv[optind][sp+1] != '\0')
+			optarg = &argv[optind++][sp+1];
+		else if(++optind >= argc) {
+			ERR(": argument missing for -", c);
+			sp = 1;
+			return('?');
+		} else
+			optarg = argv[optind++];
+		sp = 1;
+	} else {
+		if(argv[optind][++sp] == '\0') {
+			sp = 1;
+			optind++;
+		}
+		optarg = NULL;
+	}
+	return(c);
+}
+#endif /* HAVE_GETOPT */