splice

commit 03ba9c7da68c3fadb64ca32dbc9258919b7ac19a
parent f48499265ba2c6f39a1c3f35955aaa3b72ecaaa8
Author: Louis Burda <quent.burda@gmail.com>
Date:   Wed, 15 Feb 2023 19:21:02 +0100

Rename and clean up

Diffstat:
M
.gitignore
 | 
2
+-
M
Makefile
 | 
9
++++++---
A
binpatch.c
 | 
54
++++++++++++++++++++++++++++++++++++++++++++++++++++++
D
fwpatch.c
 | 
60
------------------------------------------------------------

4 files changed, 61 insertions(+), 64 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -1 +1 @@
-fwpatch
+binpatch
diff --git a/Makefile b/Makefile
@@ -1,7 +1,10 @@
 CFLAGS = -g
 
-.PHONY: all
+all: binpatch
 
-all: fwpatch
+clean:
+	rm -f binpatch
 
-fwpatch: fwpatch.c
+binpatch: binpatch.c
+
+.PHONY: all clean
diff --git a/binpatch.c b/binpatch.c
@@ -0,0 +1,54 @@
+#include <err.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+int
+main(int argc, const char **argv)
+{
+	ssize_t addr, size;
+	char *end, *data;
+	FILE *file;
+	int ret;
+
+	if (argc != 4) {
+		printf("USAGE: fwpatch TARGET OFFSET FILE\n");
+		return 0;
+	}
+
+	addr = strtoull(argv[2], &end, 0);
+	if (*end) err(1, "strtoull %s", argv[2]);
+
+	file = fopen(argv[3], "rb");
+	if (!file) err(1, "fopen %s", argv[3]);
+
+	ret = fseek(file, 0, SEEK_END);
+	if (ret < 0) err(1, "fseek %s", argv[3]);
+
+	size = ftell(file);
+	if (size < 0) err(1, "ftell %s", argv[3]);
+
+	data = malloc(size);
+	if (!data) err(1, "malloc %lu", size);
+
+	ret = fseek(file, 0, SEEK_SET);
+	if (ret < 0) err(1, "freek %s", argv[3]);
+
+	if (fread(data, 1, size, file) != size)
+		errx(1, "fread %lu", size);
+
+	fclose(file);
+
+	file = fopen(argv[1], "r+b");
+	if (!file) err(1, "fopen %s", argv[1]);
+
+	ret = fseek(file, addr, SEEK_SET);
+	if (ret < 0) err(1, "fseek %s", argv[1]);
+
+	if (fwrite(data, 1, size, file) != size)
+		errx(1, "fwrite %lu", size);
+
+	fclose(file);
+
+	free(data);
+}
diff --git a/fwpatch.c b/fwpatch.c
@@ -1,60 +0,0 @@
-#include <stdlib.h>
-#include <stdio.h>
-#include <stdarg.h>
-#include <stdint.h>
-
-const char usage[] = "USAGE: fwpatch TARGET OFFSET FILE";
-
-void
-die(const char *fmt, ...)
-{
-	va_list ap;
-
-	va_start(ap, fmt);
-	vfprintf(stderr, fmt, ap);
-	va_end(ap);
-
-	exit(1);
-}
-
-int
-main(int argc, const char **argv)
-{
-	size_t addr, size;
-	FILE *file;
-	char *end, *data;
-
-	if (argc != 4)
-		die(usage);
-
-	addr = strtoull(argv[2], &end, 0);
-	if (*end) die("Invalid offset: %s", argv[2]);
-
-	file = fopen(argv[3], "rb");
-	if (!file) die("Failed to open: %s", argv[3]);
-
-	fseek(file, 0, SEEK_END);
-	size = ftell(file);
-
-	data = malloc(size);
-	if (!data) die("Out of memory\n");
-
-	fseek(file, 0, SEEK_SET);
-	if (fread(data, 1, size, file) != size)
-		die("Read failed\n");
-
-	fclose(file);
-
-	file = fopen(argv[1], "r+b");
-	if (!file) die("Failed to open: %s", argv[1]);
-
-	fseek(file, addr, SEEK_SET);
-	if (ftell(file) != addr) die("Invalid offset\n");
-
-	if (fwrite(data, 1, size, file) != size)
-		die("Write failed\n");
-
-	fclose(file);
-
-	free(data);
-}