1 files changed, 115 insertions, 0 deletions

diff --git a/coreutils/dos2unix.c b/coreutils/dos2unix.c
new file mode 100644
index 000000000..1ed8771c0
--- /dev/null
+++ b/coreutils/dos2unix.c
@@ -0,0 +1,115 @@
+/* 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 "busybox.h"
+
+enum ConvType {
+        CT_UNIX2DOS = 1,
+        CT_DOS2UNIX
+} ConvType;
+
+/* if fn is NULL then input is stdin and output is stdout */
+static int convert(char *fn)
+{
+        FILE *in, *out;
+        int i;
+
+        if (fn != NULL) {
+                in = xfopen(fn, "rw");
+                /*
+                   The file is then created with mode read/write and
+                   permissions 0666 for glibc 2.0.6 and earlier or
+                   0600  for glibc  2.0.7 and  later.
+                 */
+                snprintf(bb_common_bufsiz1, sizeof(bb_common_bufsiz1), "%sXXXXXX", fn);
+                /*
+                   sizeof bb_common_bufsiz1 is 4096, so it should be big enough to
+                   hold the full path.  However if the output is truncated the
+                   subsequent call to mkstemp would fail.
+                 */
+                if ((i = mkstemp(&bb_common_bufsiz1[0])) == -1
+                        || chmod(bb_common_bufsiz1, 0600) == -1) {
+                        bb_perror_nomsg_and_die();
+                }
+                out = fdopen(i, "w+");
+                if (!out) {
+                        close(i);
+                        remove(bb_common_bufsiz1);
+                }
+        } else {
+                in = stdin;
+                out = stdout;
+        }
+
+        while ((i = fgetc(in)) != EOF) {
+                if (i == '\r')
+                        continue;
+                if (i == '\n') {
+                        if (ConvType == CT_UNIX2DOS)
+                                fputc('\r', out);
+                        fputc('\n', out);
+                        continue;
+                }
+                fputc(i, out);
+        }
+
+        if (fn != NULL) {
+                if (fclose(in) < 0 || fclose(out) < 0) {
+                        bb_perror_nomsg();
+                        remove(bb_common_bufsiz1);
+                        return -2;
+                }
+                /* Assume they are both on the same filesystem (which
+                 * should be true since we put them into the same directory
+                 * so we _should_ be ok, but you never know... */
+                if (rename(bb_common_bufsiz1, fn) < 0) {
+                        bb_perror_msg("cannot rename '%s' as '%s'", bb_common_bufsiz1, fn);
+                        return -1;
+                }
+        }
+
+        return 0;
+}
+
+int dos2unix_main(int argc, char *argv[])
+{
+        int o;
+
+        /* See if we are supposed to be doing dos2unix or unix2dos */
+        if (applet_name[0] == 'd') {
+                ConvType = CT_DOS2UNIX; /*2 */
+        } else {
+                ConvType = CT_UNIX2DOS; /*1 */
+        }
+        /* -u and -d are mutally exclusive */
+        opt_complementary = "?:u--d:d--u";
+        /* process parameters */
+        /* -u convert to unix */
+        /* -d convert to dos  */
+        o = getopt32(argc, argv, "du");
+
+        /* Do the conversion requested by an argument else do the default
+         * conversion depending on our name.  */
+        if (o)
+                ConvType = o;
+
+        if (optind < argc) {
+                while (optind < argc)
+                        if ((o = convert(argv[optind++])) < 0)
+                                break;
+        } else
+                o = convert(NULL);
+
+        return o;
+}