hush/coreutils/dos2unix.c
Denis Vlasenko cdf62770af dos2unix: tiny shrink
login,su: fix setup_environment() so that it works as intended
          (parameter names were a bit misleading)
fdisk: shrink
help text: shrink

function                                             old     new   delta
login_main                                          1658    1701     +43
setup_environment                                    206     203      -3
dos_compatible_flag                                    4       1      -3
dos2unix_main                                        383     375      -8
get_boot                                            1724    1702     -22
fdisk_main                                          2949    2889     -60
packed_usage                                       24250   23948    -302
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/6 up/down: 43/-398)          Total: -355 bytes
   text    data     bss     dec     hex filename
 798768     661    7428  806857   c4fc9 busybox_old
 798327     658    7428  806413   c4e0d busybox_unstripped
2008-03-17 08:42:43 +00:00

96 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;
char *name_buf = name_buf; /* for compiler */
in = stdin;
out = stdout;
if (fn != NULL) {
in = xfopen(fn, "r");
/*
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.
*/
name_buf = xasprintf("%sXXXXXX", fn);
i = mkstemp(name_buf);
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(i, out);
}
if (fn != NULL) {
if (fclose(in) < 0 || fclose(out) < 0) {
unlink(name_buf);
bb_perror_nomsg_and_die();
}
// TODO: destroys symlinks. See how passwd handles this
xrename(name_buf, fn);
free(name_buf);
}
}
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;
}