1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* choom - Change OOM score setting
*
* Copyright (C) 2018 Karel Zak <kzak@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it would be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include <errno.h>
#include "nls.h"
#include "c.h"
#include "path.h"
#include "strutils.h"
#include "closestream.h"
static void __attribute__((__noreturn__)) usage(void)
{
FILE *out = stdout;
fputs(USAGE_HEADER, out);
fprintf(out,
_(" %1$s [options] -p pid\n"
" %1$s [options] -n number -p pid\n"
" %1$s [options] -n number [--] command [args...]]\n"),
program_invocation_short_name);
fputs(USAGE_SEPARATOR, out);
fputs(_("Display and adjust OOM-killer score.\n"), out);
fputs(USAGE_OPTIONS, out);
fputs(_(" -n, --adjust <num> specify the adjust score value\n"), out);
fputs(_(" -p, --pid <num> process ID\n"), out);
fputs(USAGE_SEPARATOR, out);
printf(USAGE_HELP_OPTIONS(24));
printf(USAGE_MAN_TAIL("choom(1)"));
exit(EXIT_SUCCESS);
}
static int get_score(struct path_cxt *pc)
{
int ret;
if (ul_path_read_s32(pc, &ret, "oom_score") != 0)
err(EXIT_FAILURE, _("failed to read OOM score value"));
return ret;
}
static int get_score_adj(struct path_cxt *pc)
{
int ret;
if (ul_path_read_s32(pc, &ret, "oom_score_adj") != 0)
err(EXIT_FAILURE, _("failed to read OOM score adjust value"));
return ret;
}
static int set_score_adj(struct path_cxt *pc, int adj)
{
return ul_path_write_s64(pc, adj, "oom_score_adj");
}
int main(int argc, char **argv)
{
pid_t pid = 0;
int c, adj = 0, has_adj = 0;
struct path_cxt *pc = NULL;
static const struct option longopts[] = {
{ "adjust", required_argument, NULL, 'n' },
{ "pid", required_argument, NULL, 'p' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
close_stdout_atexit();
while ((c = getopt_long(argc, argv, "hn:p:V", longopts, NULL)) != -1) {
switch (c) {
case 'p':
pid = strtos32_or_err(optarg, _("invalid PID argument"));
break;
case 'n':
adj = strtos32_or_err(optarg, _("invalid adjust argument"));
has_adj = 1;
break;
case 'V':
print_version(EXIT_SUCCESS);
case 'h':
usage();
default:
errtryhelp(EXIT_FAILURE);
}
}
if (optind < argc && pid) {
warnx(_("invalid argument: %s"), argv[optind]);
errtryhelp(EXIT_FAILURE);
}
if (!pid && argc - optind < 1) {
warnx(_("no PID or COMMAND specified"));
errtryhelp(EXIT_FAILURE);
}
if (optind < argc && !has_adj) {
warnx(_("no OOM score adjust value specified"));
errtryhelp(EXIT_FAILURE);
}
pc = ul_new_path("/proc/%d", (int) (pid ? pid : getpid()));
/* Show */
if (!has_adj) {
printf(_("pid %d's current OOM score: %d\n"), pid, get_score(pc));
printf(_("pid %d's current OOM score adjust value: %d\n"), pid, get_score_adj(pc));
/* Change */
} else if (pid) {
int old = get_score_adj(pc);
if (set_score_adj(pc, adj))
err(EXIT_FAILURE, _("failed to set score adjust value"));
printf(_("pid %d's OOM score adjust value changed from %d to %d\n"), pid, old, adj);
/* Start new process */
} else {
if (set_score_adj(pc, adj))
err(EXIT_FAILURE, _("failed to set score adjust value"));
ul_unref_path(pc);
argv += optind;
execvp(argv[0], argv);
errexec(argv[0]);
}
ul_unref_path(pc);
return EXIT_SUCCESS;
}
|
