X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=tr.c;h=5a8116db06ccd9b4a0ec78e44766654433303337;hb=e714bce003a1b0e2c49e58fe14af86abc8b31f23;hp=079c252d3acc3a24318acbb5007aa8911aaea217;hpb=8f8d6d5f2dfd874a659e2d648db2c908f9e6093b;p=oweals%2Fbusybox.git

diff --git a/tr.c b/tr.c
index 079c252d3..5a8116db0 100644
--- a/tr.c
+++ b/tr.c
@@ -2,8 +2,10 @@
 /*
  * Mini tr implementation for busybox
  *
- * This version of tr is adapted from Minix tr
- * Author: Michiel Huisjes
+ * Copyright (c) Michiel Huisjes
+ *
+ * This version of tr is adapted from Minix tr and was modified 
+ * by Erik Andersen <andersee@debian.org> to be used in busybox.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -28,6 +30,20 @@
 #include <stdlib.h>
 #include <unistd.h>
 #include <sys/types.h>
+#define BB_DECLARE_EXTERN
+#define bb_need_write_error
+#include "messages.c"
+
+const char *tr_usage="tr [-cds] STRING1 [STRING2]\n"
+#ifndef BB_FEATURE_TRIVIAL_HELP
+	"\nTranslate, squeeze, and/or delete characters from\n"
+	"standard input, writing to standard output.\n\n"
+	"Options:\n"
+	"\t-c\ttake complement of STRING1\n"
+	"\t-d\tdelete input characters coded STRING1\n"
+	"\t-s\tsqueeze multiple output characters of STRING2 into one character\n"
+#endif
+;
 
 
 
@@ -58,7 +74,7 @@ static void convert()
 		if (in_index == read_chars) {
 			if ((read_chars = read(0, (char *) input, BUFSIZ)) <= 0) {
 				if (write(1, (char *) output, out_index) != out_index)
-					write(2, "Bad write\n", 10);
+					write(2, write_error, strlen(write_error));
 				exit(0);
 			}
 			in_index = 0;
@@ -72,7 +88,7 @@ static void convert()
 		output[out_index++] = last = coded;
 		if (out_index == BUFSIZ) {
 			if (write(1, (char *) output, out_index) != out_index) {
-				write(2, "Bad write\n", 10);
+				write(2, write_error, strlen(write_error));
 				exit(1);
 			}
 			out_index = 0;
@@ -95,22 +111,14 @@ static void map(register unsigned char *string1, register unsigned char *string2
 	}
 }
 
-static void expand(register char *arg, register unsigned char *buffer)
+static void expand(char *arg, register unsigned char *buffer)
 {
 	int i, ac;
 
 	while (*arg) {
 		if (*arg == '\\') {
 			arg++;
-			i = ac = 0;
-			if (*arg >= '0' && *arg <= '7') {
-				do {
-					ac = (ac << 3) + *arg++ - '0';
-					i++;
-				} while (i < 4 && *arg >= '0' && *arg <= '7');
-				*buffer++ = ac;
-			} else if (*arg != '\0')
-				*buffer++ = *arg++;
+			*buffer++ = process_escape_sequence(&arg);
 		} else if (*arg == '[') {
 			arg++;
 			i = *arg++;
@@ -165,16 +173,7 @@ extern int tr_main(int argc, char **argv)
 				sq_fl = TRUE;
 				break;
 			default:
-				usage("tr [-cds] STRING1 [STRING2]\n"
-#ifndef BB_FEATURE_TRIVIAL_HELP
-					  "\nTranslate, squeeze, and/or delete characters from\n"
-					  "standard input, writing to standard output.\n\n"
-					  "Options:\n"
-					  "\t-c\ttake complement of STRING1\n"
-					  "\t-d\tdelete input characters coded STRING1\n"
-					  "\t-s\tsqueeze multiple output characters of STRING2 into one character\n"
-#endif
-					  );
+				usage(tr_usage);
 			}
 		}
 		index++;
@@ -188,10 +187,12 @@ extern int tr_main(int argc, char **argv)
 		expand(argv[index++], input);
 		if (com_fl)
 			complement(input);
-		if (argv[index] != NULL)
+		if (argv[index] != NULL) {
+			if (*argv[index] == '\0')
+				fatalError("tr: STRING2 cannot be empty\n");
 			expand(argv[index], output);
-		if (argv[index] != NULL)
 			map(input, output);
+		}
 		for (ptr = input; *ptr; ptr++)
 			invec[*ptr] = TRUE;
 		for (ptr = output; *ptr; ptr++)