busybox/coreutils/yes.c
Denys Vlasenko 7c40ddd950 NOFORK fixes
"rm -i FILE" and "yes" can now be interrupted by ^C in hush.
This also now works:

$ usleep 19999999
^C
$ echo $?
130

function                                             old     new   delta
run_pipe                                            1668    1711     +43
pseudo_exec_argv                                     312     321      +9
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 52/0)               Total: 52 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-02 16:37:39 +02:00

55 lines
1.3 KiB
C

/* vi: set sw=4 ts=4: */
/*
* yes implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Size reductions and removed redundant applet name prefix from error messages.
*/
//config:config YES
//config: bool "yes (956 bytes)"
//config: default y
//config: help
//config: yes is used to repeatedly output a specific string, or
//config: the default string 'y'.
//applet:IF_YES(APPLET_NOEXEC(yes, yes, BB_DIR_USR_BIN, BB_SUID_DROP, yes))
/* was NOFORK, but then yes can't be ^C'ed if run by hush */
//kbuild:lib-$(CONFIG_YES) += yes.o
/* BB_AUDIT SUSv3 N/A -- Matches GNU behavior. */
//usage:#define yes_trivial_usage
//usage: "[STRING]"
//usage:#define yes_full_usage "\n\n"
//usage: "Repeatedly output a line with STRING, or 'y'"
#include "libbb.h"
int yes_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int yes_main(int argc UNUSED_PARAM, char **argv)
{
char **pp;
argv[0] = (char*)"y";
if (argv[1])
++argv;
do {
pp = argv;
while (1) {
fputs(*pp, stdout);
if (!*++pp)
break;
putchar(' ');
}
} while (putchar('\n') != EOF);
bb_perror_nomsg_and_die();
}