1 /* kill -- send a signal to a process
2 Copyright (C) 2002, 2003, 2004, 2005, 2008-2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Paul Eggert. */
22 #include <sys/types.h>
26 # include <sys/wait.h>
29 # define WIFSIGNALED(s) (((s) & 0xFFFF) - 1 < (unsigned int) 0xFF)
32 # define WTERMSIG(s) ((s) & 0x7F)
38 #include "operand2sig.h"
40 /* The official name of this program (e.g., no `g' prefix). */
41 #define PROGRAM_NAME "kill"
43 #define AUTHORS proper_name ("Paul Eggert")
45 #if ! (HAVE_DECL_STRSIGNAL || defined strsignal)
46 # if ! (HAVE_DECL_SYS_SIGLIST || defined sys_siglist)
47 # if HAVE_DECL__SYS_SIGLIST || defined _sys_siglist
48 # define sys_siglist _sys_siglist
49 # elif HAVE_DECL___SYS_SIGLIST || defined __sys_siglist
50 # define sys_siglist __sys_siglist
53 # if HAVE_DECL_SYS_SIGLIST || defined sys_siglist
54 # define strsignal(signum) (0 <= (signum) && (signum) <= SIGNUM_BOUND \
55 ? sys_siglist[signum] \
59 # define strsignal(signum) 0
63 static char const short_options
[] =
64 "0::1::2::3::4::5::6::7::8::9::"
65 "A::B::C::D::E::F::G::H::I::J::K::L::M::"
66 "N::O::P::Q::R::S::T::U::V::W::X::Y::Z::"
69 static struct option
const long_options
[] =
71 {"list", no_argument
, NULL
, 'l'},
72 {"signal", required_argument
, NULL
, 's'},
73 {"table", no_argument
, NULL
, 't'},
74 {GETOPT_HELP_OPTION_DECL
},
75 {GETOPT_VERSION_OPTION_DECL
},
82 if (status
!= EXIT_SUCCESS
)
83 fprintf (stderr
, _("Try `%s --help' for more information.\n"),
88 Usage: %s [-s SIGNAL | -SIGNAL] PID...\n\
89 or: %s -l [SIGNAL]...\n\
90 or: %s -t [SIGNAL]...\n\
92 program_name
, program_name
, program_name
);
94 Send signals to processes, or list signals.\n\
98 Mandatory arguments to long options are mandatory for short options too.\n\
101 -s, --signal=SIGNAL, -SIGNAL\n\
102 specify the name or number of the signal to be sent\n\
103 -l, --list list signal names, or convert signal names to/from numbers\n\
104 -t, --table print a table of signal information\n\
106 fputs (HELP_OPTION_DESCRIPTION
, stdout
);
107 fputs (VERSION_OPTION_DESCRIPTION
, stdout
);
109 SIGNAL may be a signal name like `HUP', or a signal number like `1',\n\
110 or the exit status of a process terminated by a signal.\n\
111 PID is an integer; if negative it identifies a process group.\n\
113 printf (USAGE_BUILTIN_WARNING
, PROGRAM_NAME
);
114 emit_bug_reporting_address ();
119 /* Print a row of `kill -t' output. NUM_WIDTH is the maximum signal
120 number width, and SIGNUM is the signal number to print. The
121 maximum name width is NAME_WIDTH, and SIGNAME is the name to print. */
124 print_table_row (unsigned int num_width
, int signum
,
125 unsigned int name_width
, char const *signame
)
127 char const *description
= strsignal (signum
);
128 printf ("%*d %-*s %s\n", num_width
, signum
, name_width
, signame
,
129 description
? description
: "?");
132 /* Print a list of signal names. If TABLE, print a table.
133 Print the names specified by ARGV if nonzero; otherwise,
134 print all known names. Return a suitable exit status. */
137 list_signals (bool table
, char *const *argv
)
140 int status
= EXIT_SUCCESS
;
141 char signame
[SIG2STR_MAX
];
145 unsigned int name_width
= 0;
147 /* Compute the maximum width of a signal number. */
148 unsigned int num_width
= 1;
149 for (signum
= 1; signum
<= SIGNUM_BOUND
/ 10; signum
*= 10)
152 /* Compute the maximum width of a signal name. */
153 for (signum
= 1; signum
<= SIGNUM_BOUND
; signum
++)
154 if (sig2str (signum
, signame
) == 0)
156 size_t len
= strlen (signame
);
157 if (name_width
< len
)
162 for (; *argv
; argv
++)
164 signum
= operand2sig (*argv
, signame
);
166 status
= EXIT_FAILURE
;
168 print_table_row (num_width
, signum
, name_width
, signame
);
171 for (signum
= 1; signum
<= SIGNUM_BOUND
; signum
++)
172 if (sig2str (signum
, signame
) == 0)
173 print_table_row (num_width
, signum
, name_width
, signame
);
178 for (; *argv
; argv
++)
180 signum
= operand2sig (*argv
, signame
);
182 status
= EXIT_FAILURE
;
185 if (ISDIGIT (**argv
))
188 printf ("%d\n", signum
);
192 for (signum
= 1; signum
<= SIGNUM_BOUND
; signum
++)
193 if (sig2str (signum
, signame
) == 0)
200 /* Send signal SIGNUM to all the processes or process groups specified
201 by ARGV. Return a suitable exit status. */
204 send_signals (int signum
, char *const *argv
)
206 int status
= EXIT_SUCCESS
;
207 char const *arg
= *argv
;
212 intmax_t n
= (errno
= 0, strtoimax (arg
, &endp
, 10));
215 if (errno
== ERANGE
|| pid
!= n
|| arg
== endp
|| *endp
)
217 error (0, 0, _("%s: invalid process id"), arg
);
218 status
= EXIT_FAILURE
;
220 else if (kill (pid
, signum
) != 0)
222 error (0, errno
, "%s", arg
);
223 status
= EXIT_FAILURE
;
226 while ((arg
= *++argv
));
232 main (int argc
, char **argv
)
238 char signame
[SIG2STR_MAX
];
240 initialize_main (&argc
, &argv
);
241 set_program_name (argv
[0]);
242 setlocale (LC_ALL
, "");
243 bindtextdomain (PACKAGE
, LOCALEDIR
);
244 textdomain (PACKAGE
);
246 atexit (close_stdout
);
248 while ((optc
= getopt_long (argc
, argv
, short_options
, long_options
, NULL
))
252 case '0': case '1': case '2': case '3': case '4':
253 case '5': case '6': case '7': case '8': case '9':
256 /* This option is actually a process-id. */
258 goto no_more_options
;
261 case 'A': case 'B': case 'C': case 'D': case 'E':
262 case 'F': case 'G': case 'H': case 'I': case 'J':
263 case 'K': case 'L': case 'M': case 'N': case 'O':
264 case 'P': case 'Q': case 'R': case 'S': case 'T':
265 case 'U': case 'V': case 'W': case 'X': case 'Y':
268 optarg
= argv
[optind
- 1] + strlen (argv
[optind
- 1]);
269 if (optarg
!= argv
[optind
- 1] + 2)
271 error (0, 0, _("invalid option -- %c"), optc
);
272 usage (EXIT_FAILURE
);
276 case 'n': /* -n is not documented, but is for Bash compatibility. */
280 error (0, 0, _("%s: multiple signals specified"), optarg
);
281 usage (EXIT_FAILURE
);
283 signum
= operand2sig (optarg
, signame
);
285 usage (EXIT_FAILURE
);
294 error (0, 0, _("multiple -l or -t options specified"));
295 usage (EXIT_FAILURE
);
300 case_GETOPT_HELP_CHAR
;
301 case_GETOPT_VERSION_CHAR (PROGRAM_NAME
, AUTHORS
);
303 usage (EXIT_FAILURE
);
311 error (0, 0, _("cannot combine signal with -l or -t"));
312 usage (EXIT_FAILURE
);
315 if ( ! list
&& argc
<= optind
)
317 error (0, 0, _("no process ID specified"));
318 usage (EXIT_FAILURE
);
322 ? list_signals (table
, optind
< argc
? argv
+ optind
: NULL
)
323 : send_signals (signum
, argv
+ optind
));