readlink: Remove broken support for -m and -e

There is no need to bloat readlink with these options.  No one has
ever used them anyway.

readlink.1

@@ -1,4 +1,4 @@
-.Dd 2015-10-08
+.Dd 2015-11-16
 .Dt READLINK 1
 .Os sbase
 .Sh NAME
@@ -6,7 +6,7 @@
 .Nd print symbolic link target or canonical file name
 .Sh SYNOPSIS
 .Nm
-.Op Fl e | Fl f | Fl m
+.Op Fl f
 .Op Fl n
 .Ar path
 .Sh DESCRIPTION
@@ -19,12 +19,11 @@ If not,
 exits with a non-zero return value.
 .Sh OPTIONS
 .Bl -tag -width Ds
-.It Fl e | Fl f | Fl m
+.It Fl f
 Canonicalize
-.Ar name ,
+.Ar path ,
 which needn't be a symlink,
 by recursively following every symlink in its path components.
-All | All but the last | No path components must exist.
 .It Fl n
 Do not print the terminating newline.
 .El

readlink.c

@@ -1,34 +1,28 @@
 /* See LICENSE file for copyright and license details. */
-#include <sys/stat.h>
-
-#include <libgen.h>
-#include <unistd.h>
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "util.h"
 
 static void
 usage(void)
 {
-	eprintf("usage: %s [-e | -f | -m] [-n] path\n", argv0);
+	eprintf("usage: %s [-fn] path\n", argv0);
 }
 
 int
 main(int argc, char *argv[])
 {
-	struct stat st;
+	char buf[PATH_MAX];
 	ssize_t n;
-	int nflag = 0, mefflag = 0;
-	char buf1[PATH_MAX], buf2[PATH_MAX], arg[PATH_MAX],
-	     *p, *slash, *prefix, *lp, *b = buf1;
+	int nflag = 0, fflag = 0;
 
 	ARGBEGIN {
-	case 'm':
-	case 'e':
 	case 'f':
-		mefflag = ARGC();
+		fflag = ARGC();
 		break;
 	case 'n':
 		nflag = 1;
@@ -43,48 +37,16 @@ main(int argc, char *argv[])
 	if (strlen(argv[0]) >= PATH_MAX)
 		eprintf("path too long\n");
 
-	switch (mefflag) {
-	case 'm':
-		slash = strchr(argv[0], '/');
-		prefix = (slash == argv[0]) ? "/" : (!slash) ? "./" : "";
-
-		estrlcpy(arg, prefix, sizeof(arg));
-		estrlcat(arg, argv[0], sizeof(arg));
-
-		for (lp = "", p = arg + (argv[0][0] == '/'); *p; p++) {
-			if (*p != '/')
-				continue;
-			*p = '\0';
-			if (!realpath(arg, b)) {
-				*p = '/';
-				goto mdone;
-			}
-			b = (b == buf1) ? buf2 : buf1;
-			lp = p;
-			*p = '/';
-		}
-		if (!realpath(arg, b)) {
-mdone:
-			b = (b == buf1) ? buf2 : buf1;
-			estrlcat(b, lp, sizeof(arg));
-		}
-		break;
-	case 'e':
-		if (stat(argv[0], &st) < 0)
-			eprintf("stat %s:", argv[0]);
-		if (!realpath(argv[0], b))
+	if (fflag) {
+		if (!realpath(argv[0], buf))
 			eprintf("realpath %s:", argv[0]);
-		break;
-	case 'f':
-		if (!realpath(argv[0], b))
-			eprintf("realpath %s:", argv[0]);
-		break;
-	default:
-		if ((n = readlink(argv[0], b, PATH_MAX - 1)) < 0)
+	} else {
+		if ((n = readlink(argv[0], buf, PATH_MAX - 1)) < 0)
 			eprintf("readlink %s:", argv[0]);
-		b[n] = '\0';
+		buf[n] = '\0';
 	}
-	fputs(b, stdout);
+
+	fputs(buf, stdout);
 	if (!nflag)
 		putchar('\n');