commit 66390331e836daad55adb33b41b8eecee0a4fd6b
from: Alexander Arkhipov <src@mineeyes.cyou>
date: Fri Sep 30 21:01:32 2022 UTC

remove BSD dependencies

commit - b79428b4aec5e99d9c0f1dcc07fe677c2679cf4a
commit + 66390331e836daad55adb33b41b8eecee0a4fd6b
blob - 2ab6b9e65216392e7300fb04a6f2f76a3c4d1ba2
blob + ca6ddb5d3b7b497dbbb5dc1ca18cb8fa9fc19d81
--- rene.c
+++ rene.c
@@ -1,36 +1,31 @@
+#include <errno.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
-int interactive = 0;
-int noact = 0;
-int nooverride = 0;
-int replaceall = 0;
-int replacelast = 0;
-int verbose = 0;
+#define O_INTERACTIVE 1
+#define O_NOACT (1<<1)
+#define O_NOOVERRIDE (1<<2)
+#define O_REPLACEALL (1<<3)
+#define O_REPLACELAST (1<<4)
+#define O_VERBOSE (1<<5)
 
-void
-usage(void)
-{
-	fprintf(stderr, "usage: rene [-ailnov] from to file ...\n");
-	exit(EXIT_FAILURE);
-}
+uint8_t opts;
 
-char *rene;
-
 void
-err(const char *fmt, ...)
+warn(const char *fmt, ...)
 {
-	fprintf(stderr, "%s: ", rene);
+	char *w = strerror(errno);
+	fputs("rene: ", stderr);
 	if (fmt != NULL) {
 		va_list argp;
 		va_start(argp, fmt);
 		vfprintf(stderr, fmt, argp);
 		va_end(argp);
 	}
-	fprintf(stderr, "\n");
+	fprintf(stderr, ": %s\n", w);
 }
 
 int
@@ -47,17 +42,19 @@ strrep(char *from, char *to, char *s, char **new)
 		return 0;
 	int fromlen = strlen(from);
 	int count = 1;
-	if (replacelast || replaceall) {
+	if (opts & O_REPLACELAST || opts & O_REPLACEALL) {
 		char *temp = p;
 		while (temp) {
 			temp = strstr(temp+fromlen, from);
-			count = (replaceall && temp) ? count + 1 : count;
-			p = (replacelast && temp) ? temp : p;
+			count = (opts & O_REPLACEALL && temp) ? count + 1 :
+			    count;
+			p = (opts & O_REPLACELAST && temp) ? temp : p;
 		}
 	}
 
-	if (!(*new = malloc(strlen(s) + strlen(to)*count - fromlen*count + 1))) {
-		err("%s: couldn't allocate memory", s);
+	if (!(*new =
+	    malloc(strlen(s) + strlen(to)*count - fromlen*count + 1))) {
+		warn("malloc");
 		return 0;
 	}
 
@@ -69,7 +66,7 @@ strrep(char *from, char *to, char *s, char **new)
 		for (; *top != '\0'; *newp++ = *top++)
 			;
 		s += fromlen;
-		p = replaceall ? strstr(s, from) : strchr(s, '\0');
+		p = opts & O_REPLACEALL ? strstr(s, from) : strchr(s, '\0');
 		p = p ? p : strchr(s, '\0');
 		for (; s != p; *newp++ = *s++)
 			;
@@ -94,41 +91,47 @@ ren(char *from, char *to, char *f)
 	char *new = NULL;
 	if (!strrep(from, to, f, &new))
 		return;
-	if ((nooverride || interactive) && access(new, F_OK) == 0)
-		yes = nooverride ? 0 : ask(f, new);
-	if (yes && !noact)
-		yes -= rename(f, new);
-	if (verbose && yes)
+	if ((opts & O_NOOVERRIDE || opts & O_INTERACTIVE) &&
+	    access(new, F_OK) == 0)
+		yes = opts & O_NOOVERRIDE ? 0 : ask(f, new);
+	if (yes && !(opts & O_NOACT) && !(yes += rename(f, new)))
+		warn("rename");
+	if (opts & O_VERBOSE && yes)
 		printf("%s -> %s\n", f, new);
-	free(new);
 }
 
+void
+usage(void)
+{
+	fputs("usage: rene [-ailnov] from to file ...\n", stderr);
+	exit(EXIT_FAILURE);
+}
+
 int
 main(int argc, char *argv[])
 {
 	char *from, *to;
-	rene = argv[0];
 
 	int c;
 	while ((c = getopt(argc, argv, "ailnov")) != -1) {
 		switch (c) {
 		case 'a':
-			replaceall = 1;
+			opts |= O_REPLACEALL;
 			break;
 		case 'i':
-			interactive = 1;
+			opts |= O_INTERACTIVE;
 			break;
 		case 'l':
-			replacelast = 1;
+			opts |= O_REPLACELAST;
 			break;
 		case 'n':
-			noact = 1;
+			opts |= O_NOACT;
 			break;
 		case 'o':
-			nooverride = 1;
+			opts |= O_NOOVERRIDE;
 			break;
 		case 'v':
-			verbose = 1;
+			opts |= O_VERBOSE;
 			break;
 		default:
 			usage();