1/*
2 Copyright (c) 2003, 2010, Oracle and/or its affiliates
3
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; version 2 of the License.
7
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
12
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
16
17/* Wait until a program dies */
18
19#include <my_global.h>
20#include <m_string.h>
21#include <my_sys.h>
22#include <my_getopt.h>
23#include <signal.h>
24#include <errno.h>
25
26static const char *VER= "1.1";
27static char *progname;
28static my_bool verbose;
29
30void usage(void);
31
32static struct my_option my_long_options[] =
33{
34 {"help", '?', "Display this help and exit.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0,
35 0, 0, 0, 0, 0},
36 {"help", 'I', "Synonym for -?.", 0, 0, 0, GET_NO_ARG, NO_ARG, 0,
37 0, 0, 0, 0, 0},
38 {"verbose", 'v',
39 "Be more verbose. Give a warning, if kill can't handle signal 0.",
40 &verbose, &verbose, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, 0, 0},
41 {"version", 'V', "Print version information and exit.", 0, 0, 0,
42 GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0},
43 { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
44};
45
46static my_bool
47get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
48 char *argument __attribute__((unused)))
49{
50 switch(optid) {
51 case 'V':
52 printf("%s version %s by Jani Tolonen\n", progname, VER);
53 exit(0);
54 case 'I':
55 case '?':
56 usage();
57 exit(0);
58 }
59 return 0;
60}
61
62
63int main(int argc, char *argv[])
64{
65 int pid= 0, t= 0, sig= 0;
66
67 progname= argv[0];
68
69 if (handle_options(&argc, &argv, my_long_options, get_one_option))
70 exit(-1);
71 if (!argv[0] || !argv[1] || (pid= atoi(argv[0])) <= 0 ||
72 (t= atoi(argv[1])) <= 0)
73 {
74 usage();
75 exit(-1);
76 }
77 for (; t > 0; t--)
78 {
79 if (kill((pid_t) pid, sig))
80 {
81 if (errno == EINVAL)
82 {
83 if (verbose)
84 printf("WARNING: kill couldn't handle signal 0, using signal 1.\n");
85 sig= 1;
86 t++;
87 continue;
88 }
89 return 0;
90 }
91 sleep(1);
92 }
93 return 1;
94}
95
96void usage(void)
97{
98 printf("%s version %s by Jani Tolonen\n\n", progname, VER);
99 printf("usage: %s [options] #pid #time\n\n", progname);
100 printf("Description: Waits for a program, which program id is #pid, to\n");
101 printf("terminate within #time seconds. If the program terminates within\n");
102 printf("this time, or if the #pid no longer exists, value 0 is returned.\n");
103 printf("Otherwise 1 is returned. Both #pid and #time must be positive\n");
104 printf("integer arguments.\n\n");
105 printf("Options:\n");
106 my_print_help(my_long_options);
107}
108