1 files changed, 98 insertions, 0 deletions
diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
new file mode 100644
index 0000000..309cbc3
--- /dev/null
+++ b/coreutils/dos2unix.c
@@ -0,0 +1,98 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * dos2unix for BusyBox
+ *
+ * dos2unix '\n' convertor 0.5.0
+ * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
+ * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
+ * All rights reserved.
+ *
+ * dos2unix filters reading input from stdin and writing output to stdout.
+ *
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+*/
+
+#include "libbb.h"
+
+enum {
+	CT_UNIX2DOS = 1,
+	CT_DOS2UNIX
+};
+
+/* if fn is NULL then input is stdin and output is stdout */
+static void convert(char *fn, int conv_type)
+{
+	FILE *in, *out;
+	int i;
+	char *temp_fn = temp_fn; /* for compiler */
+	char *resolved_fn = resolved_fn;
+
+	in = stdin;
+	out = stdout;
+	if (fn != NULL) {
+		struct stat st;
+
+		resolved_fn = xmalloc_follow_symlinks(fn);
+		if (resolved_fn == NULL)
+			bb_simple_perror_msg_and_die(fn);
+		in = xfopen_for_read(resolved_fn);
+		fstat(fileno(in), &st);
+
+		temp_fn = xasprintf("%sXXXXXX", resolved_fn);
+		i = mkstemp(temp_fn);
+		if (i == -1
+		 || fchmod(i, st.st_mode) == -1
+		 || !(out = fdopen(i, "w+"))
+		) {
+			bb_simple_perror_msg_and_die(temp_fn);
+		}
+	}
+
+	while ((i = fgetc(in)) != EOF) {
+		if (i == '\r')
+			continue;
+		if (i == '\n')
+			if (conv_type == CT_UNIX2DOS)
+				fputc('\r', out);
+		fputc(i, out);
+	}
+
+	if (fn != NULL) {
+		if (fclose(in) < 0 || fclose(out) < 0) {
+			unlink(temp_fn);
+			bb_perror_nomsg_and_die();
+		}
+		xrename(temp_fn, resolved_fn);
+		free(temp_fn);
+		free(resolved_fn);
+	}
+}
+
+int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc, char **argv)
+{
+	int o, conv_type;
+
+	/* See if we are supposed to be doing dos2unix or unix2dos */
+	conv_type = CT_UNIX2DOS;
+	if (applet_name[0] == 'd') {
+		conv_type = CT_DOS2UNIX;
+	}
+
+	/* -u convert to unix, -d convert to dos */
+	opt_complementary = "u--d:d--u"; /* mutually exclusive */
+	o = getopt32(argv, "du");
+
+	/* Do the conversion requested by an argument else do the default
+	 * conversion depending on our name.  */
+	if (o)
+		conv_type = o;
+
+	do {
+		/* might be convert(NULL) if there is no filename given */
+		convert(argv[optind], conv_type);
+		optind++;
+	} while (optind < argc);
+
+	return 0;
+}