+/* vi: set sw=4 ts=4: */
/*
* dos2unix for BusyBox
*
* All rights reserved.
*
* dos2unix filters reading input from stdin and writing output to stdout.
- * Without arguments it reverts the format (e.i. if source is in UNIX format,
- * output is in DOS format and vice versa).
*
- * 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.
*/
-#include <string.h>
-#include <unistd.h>
-#include <stdint.h>
-#include <fcntl.h>
-#include <sys/time.h>
-#include "busybox.h"
+//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"
-#define CT_UNIX2DOS 1
-#define CT_DOS2UNIX 2
-#define tempFn bb_common_bufsiz1
+#include "libbb.h"
+
+/* This is a NOEXEC applet. Be very careful! */
+
+enum {
+ CT_UNIX2DOS = 1,
+ CT_DOS2UNIX
+};
/* if fn is NULL then input is stdin and output is stdout */
-static int convert(char *fn, int ConvType)
+static void convert(char *fn, int conv_type)
{
- int c, fd;
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 = bb_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(tempFn, sizeof(tempFn), "%sXXXXXX", fn);
- /*
- sizeof tempFn 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 ((fd = mkstemp(&tempFn[0])) == -1 || chmod(tempFn, 0600) == -1) {
- bb_perror_nomsg_and_die();
- }
- out = fdopen(fd, "w+");
- if (!out) {
- close(fd);
- remove(tempFn);
- }
- } 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 ((c = fgetc(in)) != EOF) {
- if (c == '\r')
+ while ((i = fgetc(in)) != EOF) {
+ if (i == '\r')
continue;
- if (c == '\n') {
- if (ConvType == CT_UNIX2DOS)
+ if (i == '\n')
+ if (conv_type == CT_UNIX2DOS)
fputc('\r', out);
- fputc('\n', out);
- continue;
- }
- fputc(c, out);
+ fputc(i, out);
}
if (fn != NULL) {
if (fclose(in) < 0 || fclose(out) < 0) {
- bb_perror_nomsg();
- remove(tempFn);
- 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(tempFn, fn) < 0) {
- bb_perror_msg("cannot rename '%s' as '%s'", tempFn, 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) MAIN_EXTERNALLY_VISIBLE;
+int dos2unix_main(int argc UNUSED_PARAM, char **argv)
{
- int ConvType;
- int o;
+ int o, conv_type;
/* See if we are supposed to be doing dos2unix or unix2dos */
- if (argv[0][0]=='d') {
- ConvType = CT_DOS2UNIX; /*1*/
- } else {
- ConvType = CT_UNIX2DOS; /*2*/
+ conv_type = CT_UNIX2DOS;
+ if (applet_name[0] == 'd') {
+ conv_type = CT_DOS2UNIX;
}
- /* -u and -d are mutally exclusive */
- bb_opt_complementally = "?:u--d:d--u";
- /* process parameters */
- /* -u convert to unix */
- /* -d convert to dos */
- o = bb_getopt_ulflags(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++], ConvType)) < 0)
- break;
- }
- else
- o = convert(NULL, ConvType);
+ 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