1 files changed, 91 insertions, 0 deletions
diff --git a/package/toolbox/src/src/cmp.c b/package/toolbox/src/src/cmp.c
new file mode 100644
index 000000000..79e56c41a
--- /dev/null
+++ b/package/toolbox/src/src/cmp.c
@@ -0,0 +1,91 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+
+int main(int argc, char *argv[])
+{
+    int c;
+    int fd1, fd2;
+	char buf1[4096], buf2[4096];
+    int res, res1, res2;
+	int rv = 0;
+	int i;
+	int filepos = 0;
+
+	int show_byte = 0;
+	int show_all = 0;
+	int limit = 0;
+
+    do {
+        c = getopt(argc, argv, "bln:");
+        if (c == EOF)
+            break;
+        switch (c) {
+        case 'b':
+            show_byte = 1;
+            break;
+        case 'l':
+            show_all = 1;
+            break;
+        case 'n':
+            limit = atoi(optarg);
+            break;
+        case '?':
+            fprintf(stderr, "%s: invalid option -%c\n",
+                argv[0], optopt);
+            exit(1);
+        }
+    } while (1);
+
+    if (optind + 2 != argc) {
+        fprintf(stderr, "Usage: %s [-b] [-l] [-n count] file1 file2\n", argv[0]);
+        exit(1);
+    }
+
+    fd1 = open(argv[optind], O_RDONLY);
+    if(fd1 < 0) {
+        fprintf(stderr, "could not open %s, %s\n", argv[optind], strerror(errno));
+        return 1;
+    }
+
+    fd2 = open(argv[optind+1], O_RDONLY);
+    if(fd2 < 0) {
+        fprintf(stderr, "could not open %s, %s\n", argv[optind+1], strerror(errno));
+        return 1;
+    }
+    
+    while(1) {
+        res1 = read(fd1, &buf1, sizeof(buf1));
+        res2 = read(fd2, &buf2, sizeof(buf2));
+		res = res1 < res2 ? res1 : res2;
+		if(res1 == 0 && res2 == 0) {
+			return rv;
+		}
+		for(i = 0; i < res; i++) {
+			if(buf1[i] != buf2[i]) {
+				printf("%s %s differ byte %d", argv[optind], argv[optind+1], filepos + i);
+				if(show_byte)
+					printf(" 0x%02x 0x%02x", buf1[i], buf2[i]);
+				printf("\n");
+				if(!show_all)
+					return 1;
+				rv = 1;
+			}
+			if(limit) {
+				limit--;
+				if(limit == 0)
+					return rv;
+			}
+		}
+		if(res1 != res2 || res < 0) {
+			printf("%s on %s\n", res < 0 ? "Read error" : "EOF", res1 < res2 ? argv[optind] : argv[optind+1]);
+			return 1;
+		}
+		filepos += res;
+    }
+}