*
* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//usage:#define dos2unix_trivial_usage
+//usage: "[-ud] [FILE]"
+//usage:#define dos2unix_full_usage "\n\n"
+//usage: "Convert FILE in-place from DOS to Unix format.\n"
+//usage: "When no file is given, use stdin/stdout.\n"
+//usage: "\n -u dos2unix"
+//usage: "\n -d unix2dos"
+//usage:
+//usage:#define unix2dos_trivial_usage
+//usage: "[-ud] [FILE]"
+//usage:#define unix2dos_full_usage "\n\n"
+//usage: "Convert FILE in-place from Unix to DOS format.\n"
+//usage: "When no file is given, use stdin/stdout.\n"
+//usage: "\n -u dos2unix"
+//usage: "\n -d unix2dos"
+
#include "libbb.h"
-enum ConvType {
+/* This is a NOEXEC applet. Be very careful! */
+
+enum {
CT_UNIX2DOS = 1,
CT_DOS2UNIX
-} ConvType;
+};
/* if fn is NULL then input is stdin and output is stdout */
-static int convert(char *fn)
+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) {
- 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.
- */
- i = mkstemp(&bb_common_bufsiz1[0]);
- if (i == -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;
+ 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 = xmkstemp(temp_fn);
+ if (fchmod(i, st.st_mode) == -1)
+ bb_simple_perror_msg_and_die(temp_fn);
+
+ out = xfdopen_for_write(i);
}
while ((i = fgetc(in)) != EOF) {
if (i == '\r')
continue;
- if (i == '\n') {
- if (ConvType == CT_UNIX2DOS)
+ if (i == '\n')
+ if (conv_type == 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;
+ unlink(temp_fn);
+ bb_perror_nomsg_and_die();
}
+ xrename(temp_fn, resolved_fn);
+ free(temp_fn);
+ free(resolved_fn);
}
-
- return 0;
}
-int dos2unix_main(int argc, char **argv);
-int dos2unix_main(int argc, char **argv)
+int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc UNUSED_PARAM, char **argv)
{
- int o;
+ int o, conv_type;
/* See if we are supposed to be doing dos2unix or unix2dos */
+ conv_type = CT_UNIX2DOS;
if (applet_name[0] == 'd') {
- ConvType = CT_DOS2UNIX; /*2 */
- } else {
- ConvType = CT_UNIX2DOS; /*1 */
+ conv_type = CT_DOS2UNIX;
}
- /* -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");
+
+ /* -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)
- ConvType = o;
+ conv_type = o;
- if (optind < argc) {
- while (optind < argc)
- if ((o = convert(argv[optind++])) < 0)
- break;
- } else
- o = convert(NULL);
+ argv += optind;
+ do {
+ /* might be convert(NULL) if there is no filename given */
+ convert(*argv, conv_type);
+ } while (*argv && *++argv);
- return o;
+ return 0;
}
projects / platform / upstream / busybox.git / blobdiff