hush/coreutils/cat.c
Denis Vlasenko 50f7f446ec bb_full_fd_action: remove potential xmalloc from NOFORK path
cat: stop using stdio.h opens
libbb: introduce & use open[3]_or_warn
function                                             old     new   delta
open3_or_warn                                          -      54     +54
bb_cat                                               115     144     +29
open_or_warn                                           -      25     +25
unlzma                                              2404    2412      +8
chattr_main                                          334     339      +5
xstrtoul_range_sfx                                   251     255      +4
telnet_main                                         1514    1510      -4
static.opt                                             4       -      -4
qgravechar                                           122     118      -4
fuser_add_pid                                         61      54      -7
fuser_add_inode                                      154     147      -7
writeFileToTarball                                  1542    1534      -8
refresh                                             1156    1148      -8
do_show                                              856     846     -10
read_leases                                          212     200     -12
setup_redirects                                      236     222     -14
iproute_list_or_flush                               1582    1568     -14
read_config                                          427     411     -16
write_leases                                         284     264     -20
hash_file                                            338     318     -20
copy_file                                           1760    1740     -20
do_iproute                                          2610    2588     -22
bb_full_fd_action                                    320     269     -51
open_to_or_warn                                      103      49     -54
fuser_main                                          1660    1596     -64
.rodata                                           131160  131096     -64
------------------------------------------------------------------------------
(add/remove: 2/1 grow/shrink: 4/19 up/down: 125/-423)        Total: -298 bytes
2007-04-11 23:20:53 +00:00

53 lines
1.0 KiB
C

/* vi: set sw=4 ts=4: */
/*
* cat implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2, see file License in this tarball for details.
*/
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
#include "busybox.h"
/* This is a NOFORK applet. Be very careful! */
int bb_cat(char **argv)
{
static const char *const argv_dash[] = { "-", NULL };
int fd;
int retval = EXIT_SUCCESS;
if (!*argv)
argv = (char**) &argv_dash;
do {
fd = STDIN_FILENO;
if (!LONE_DASH(*argv))
fd = open_or_warn(*argv, O_RDONLY);
if (fd >= 0) {
/* This is not an xfunc - never exits */
off_t r = bb_copyfd_eof(fd, STDOUT_FILENO);
if (fd != STDIN_FILENO)
close(fd);
if (r >= 0)
continue;
}
retval = EXIT_FAILURE;
} while (*++argv);
return retval;
}
int cat_main(int argc, char **argv);
int cat_main(int argc, char **argv)
{
getopt32(argc, argv, "u");
argv += optind;
return bb_cat(argv);
}