1 /* vi: set sw=4 ts=4: */
5 * dos2unix '\n' converter 0.5.0
6 * based on Unix2Dos 0.9.0 by Peter Hanecak (made 19.2.1997)
7 * Copyright 1997,.. by Peter Hanecak <hanecak@megaloman.sk>.
10 * dos2unix filters reading input from stdin and writing output to stdout.
12 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
14 //config:config DOS2UNIX
15 //config: bool "dos2unix (5.1 kb)"
18 //config: dos2unix is used to convert a text file from DOS format to
19 //config: UNIX format, and vice versa.
21 //config:config UNIX2DOS
22 //config: bool "unix2dos (5.1 kb)"
25 //config: unix2dos is used to convert a text file from UNIX format to
26 //config: DOS format, and vice versa.
28 //applet:IF_DOS2UNIX(APPLET_NOEXEC(dos2unix, dos2unix, BB_DIR_USR_BIN, BB_SUID_DROP, dos2unix))
29 //applet:IF_UNIX2DOS(APPLET_NOEXEC(unix2dos, dos2unix, BB_DIR_USR_BIN, BB_SUID_DROP, unix2dos))
31 //kbuild:lib-$(CONFIG_DOS2UNIX) += dos2unix.o
32 //kbuild:lib-$(CONFIG_UNIX2DOS) += dos2unix.o
34 //usage:#define dos2unix_trivial_usage
35 //usage: "[-ud] [FILE]"
36 //usage:#define dos2unix_full_usage "\n\n"
37 //usage: "Convert FILE in-place from DOS to Unix format.\n"
38 //usage: "When no file is given, use stdin/stdout.\n"
39 //usage: "\n -u dos2unix"
40 //usage: "\n -d unix2dos"
42 //usage:#define unix2dos_trivial_usage
43 //usage: "[-ud] [FILE]"
44 //usage:#define unix2dos_full_usage "\n\n"
45 //usage: "Convert FILE in-place from Unix to DOS format.\n"
46 //usage: "When no file is given, use stdin/stdout.\n"
47 //usage: "\n -u dos2unix"
48 //usage: "\n -d unix2dos"
52 /* This is a NOEXEC applet. Be very careful! */
59 /* if fn is NULL then input is stdin and output is stdout */
60 static void convert(char *fn, int conv_type)
64 char *temp_fn = temp_fn; /* for compiler */
65 char *resolved_fn = resolved_fn;
73 resolved_fn = xmalloc_follow_symlinks(fn);
74 if (resolved_fn == NULL)
75 bb_simple_perror_msg_and_die(fn);
76 in = xfopen_for_read(resolved_fn);
77 xfstat(fileno(in), &st, resolved_fn);
79 temp_fn = xasprintf("%sXXXXXX", resolved_fn);
80 fd = xmkstemp(temp_fn);
81 if (fchmod(fd, st.st_mode) == -1)
82 bb_simple_perror_msg_and_die(temp_fn);
83 fchown(fd, st.st_uid, st.st_gid);
85 out = xfdopen_for_write(fd);
88 while ((ch = fgetc(in)) != EOF) {
92 if (conv_type == CT_UNIX2DOS)
98 if (fclose(in) < 0 || fclose(out) < 0) {
100 bb_perror_nomsg_and_die();
102 xrename(temp_fn, resolved_fn);
108 int dos2unix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
109 int dos2unix_main(int argc UNUSED_PARAM, char **argv)
113 /* See if we are supposed to be doing dos2unix or unix2dos */
115 && (!ENABLE_UNIX2DOS || applet_name[0] == 'd')
117 conv_type = CT_DOS2UNIX;
119 conv_type = CT_UNIX2DOS;
122 /* -u convert to unix, -d convert to dos */
123 o = getopt32(argv, "^" "du" "\0" "u--d:d--u"); /* mutually exclusive */
125 /* Do the conversion requested by an argument else do the default
126 * conversion depending on our name. */
132 /* might be convert(NULL) if there is no filename given */
133 convert(*argv, conv_type);
134 } while (*argv && *++argv);