shithub: hx

Download patch

ref: ea234b61b3258a71793584c729427da8264e9a2f
parent: 5788a6536a136a541c4987d97a8ef225275d2e9b
author: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
date: Wed Jan 25 08:26:10 EST 2023 

add -p ("pipe") option


--- a/README.md
+++ b/README.md
@@ -20,5 +20,6 @@
 
 # Notes
 
- * hx will print data as soon as it is available (if used on pipes), without buffering.
- * it provides an option `-s` ("section") to print data read separating it into sections.
+ * hx will print data as soon as it is available (if used on pipes), without buffering
+ * option `-s` ("section") to print data read immediately, separating it into *sections*
+ * option `-p` ("pipe") to print hex on `stderr` and pipe incoming data as is on `stdout`
--- a/hx.c
+++ b/hx.c
@@ -25,7 +25,7 @@
 	Linesz = 87,
 };
 
-static int section = 0;
+static int section = 0, pipeit = 0;
 static unsigned char *buf;
 static const char b2h[] = (
 	"000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f"
@@ -61,6 +61,8 @@
 			section = 0;
 			break;
 		}
+		if (pipeit > 0)
+			write(pipeit, buf, sz);
 
 		for (i = 0; i < sz; ) {
 			if (lineoff == 0) {
@@ -112,7 +114,7 @@
 			if (off >= (int)sizeof(s)-Linesz) {
 writes:
 				for (wroff = 0; wroff < off; wroff += r) {
-					if ((r = write(1, s+wroff, off-wroff)) < 0) {
+					if ((r = write(pipeit+1, s+wroff, off-wroff)) < 0) {
 						sz = -1;
 						break;
 					}
@@ -149,7 +151,7 @@
 			goto ascii;
 		}
 		for (wroff = 0; wroff < off; wroff += r) {
-			if ((r = write(1, s+wroff, off-wroff)) < 0) {
+			if ((r = write(pipeit+1, s+wroff, off-wroff)) < 0) {
 				sz = -1;
 				break;
 			}
@@ -157,7 +159,7 @@
 	}
 
 	if (section) {
-		write(1, "\n", 1);
+		write(pipeit+1, "\n", 1);
 		goto again;
 	}
 
@@ -171,7 +173,7 @@
 #endif
 main(int argc, char **argv)
 {
-	int i, fd, res;
+	int i, fd, res, opts;
 
 	if ((buf = malloc(Bufsz)) == nil) {
 		perror("buf");
@@ -179,26 +181,38 @@
 	}
 
 	res = 0;
-	if (argc > 1 && strcmp(argv[1], "-s") == 0) {
-		section = 1;
-		argv++;
-		argc--;
-	}
-
-	if (argc == 1) {
-		i = 1;
-		fd = 0;
-		goto dump;
-	}
+	opts = 0;
 	for (i = 1; i < argc && res == 0; i++) {
+		if (argv[i][0] == '-' && argv[i][2] == 0) {
+			switch (argv[i][1]) {
+			case 's':
+				section = 1;
+				opts++;
+				break;
+			case 'p':
+				pipeit = 1;
+				opts++;
+				break;
+			default:
+				write(2, "unknown option: -", 17);
+				write(2, argv[i]+1, 1);
+				write(2, "\n", 1);
+				exits("usage");
+			}
+			if (opts == argc-1) {
+				fd = 0;
+				goto dump;
+			}
+			continue;
+		}
 		if ((fd = open(argv[i], OREAD)) < 0) {
 			perror(argv[i]);
 			res = 1;
 		} else {
-			if (argc > 2) {
-				write(1, "hx ", 3);
-				write(1, argv[i], strlen(argv[i]));
-				write(1, "\n", 1);
+			if (argc > 2+opts) {
+				write(pipeit+1, "hx ", 3);
+				write(pipeit+1, argv[i], strlen(argv[i]));
+				write(pipeit+1, "\n", 1);
 			}
 dump:
 			if ((res = hx(fd)) != 0)