busybox/coreutils/dos2unix.c
Denis Vlasenko 542963685c dos2unix: shrink
bloatcheck for last four commits:
function                                             old     new   delta
xrename                                                -      38     +38
md5_hash_block                                       437     458     +21
sv_main                                             1237    1254     +17
update_status                                        569     580     +11
decode_format_string                                 795     805     +10
doset                                                317     326      +9
passwd_main                                         1070    1074      +4
sha1_compile                                         447     446      -1
rename_or_warn                                        49      47      -2
fill_bounds                                          174     172      -2
buffer_fill_and_print                                 76      73      -3
bb_perror_nomsg                                        9       -      -9
get_next_block                                      1810    1795     -15
patch_main                                          1107    1085     -22
write_status_file                                   1123    1077     -46
remove                                                52       -     -52
__GI_remove                                           52       -     -52
open_as_user                                         171     111     -60
microcom_main                                        811     747     -64
dos2unix_main                                        452     383     -69
------------------------------------------------------------------------------
(add/remove: 1/3 grow/shrink: 6/10 up/down: 110/-397)        Total: -287 bytes
2008-02-17 14:31:50 +00:00

97 lines
2.1 KiB
C

/* 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;
#define name_buf bb_common_bufsiz1
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(name_buf, sizeof(name_buf), "%sXXXXXX", fn);
i = mkstemp(&name_buf[0]);
if (i == -1
|| fchmod(i, 0600) == -1
|| !(out = fdopen(i, "w+"))
) {
bb_perror_nomsg_and_die();
}
}
while ((i = fgetc(in)) != EOF) {
if (i == '\r')
continue;
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) {
unlink(name_buf);
bb_perror_nomsg_and_die();
}
xrename(name_buf, 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;
}