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-rw-r--r--.gitignore6
-rw-r--r--configure.ac9
-rw-r--r--plugins/Makefile.am21
-rw-r--r--plugins/check_swap.c782
-rw-r--r--plugins/check_swap.d/check_swap.h44
-rw-r--r--plugins/check_swap.d/swap.c432
-rw-r--r--plugins/tests/test_check_swap.c23
-rwxr-xr-xplugins/tests/test_check_swap.t6
-rw-r--r--plugins/tests/var/proc_meminfo55
9 files changed, 845 insertions, 533 deletions
diff --git a/.gitignore b/.gitignore
index 6f903d61..bbd7d844 100644
--- a/.gitignore
+++ b/.gitignore
@@ -221,7 +221,13 @@ NP-VERSION-FILE
221/plugins/tests/Makefile.in 221/plugins/tests/Makefile.in
222/plugins/tests/test_utils 222/plugins/tests/test_utils
223/plugins/tests/test_disk 223/plugins/tests/test_disk
224/plugins/tests/test_check_swap
224/plugins/tests/.deps 225/plugins/tests/.deps
226/plugins/tests/.dirstamp
227
228# /plugins/check_swap.d
229/plugins/check_swap.d/.deps
230/plugins/check_swap.d/.dirstamp
225 231
226# /plugins-root/ 232# /plugins-root/
227/plugins-root/.deps 233/plugins-root/.deps
diff --git a/configure.ac b/configure.ac
index 8594238f..0432336b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ AC_INIT(monitoring-plugins,2.4git)
4AC_CONFIG_SRCDIR(NPTest.pm) 4AC_CONFIG_SRCDIR(NPTest.pm)
5AC_CONFIG_FILES([gl/Makefile]) 5AC_CONFIG_FILES([gl/Makefile])
6AC_CONFIG_AUX_DIR(build-aux) 6AC_CONFIG_AUX_DIR(build-aux)
7AM_INIT_AUTOMAKE([1.8.3]) 7AM_INIT_AUTOMAKE([1.8.3 subdir-objects])
8AM_SILENT_RULES([yes]) 8AM_SILENT_RULES([yes])
9AM_MAINTAINER_MODE([enable]) 9AM_MAINTAINER_MODE([enable])
10AC_CONFIG_HEADERS([config.h]) 10AC_CONFIG_HEADERS([config.h])
@@ -185,6 +185,9 @@ fi
185if test "$enable_libtap" = "yes" ; then 185if test "$enable_libtap" = "yes" ; then
186 EXTRA_TEST="test_utils test_disk test_tcp test_cmd test_base64" 186 EXTRA_TEST="test_utils test_disk test_tcp test_cmd test_base64"
187 AC_SUBST(EXTRA_TEST) 187 AC_SUBST(EXTRA_TEST)
188
189 EXTRA_PLUGIN_TESTS="tests/test_check_swap"
190 AC_SUBST(EXTRA_PLUGIN_TESTS)
188fi 191fi
189 192
190dnl INI Parsing 193dnl INI Parsing
@@ -1850,8 +1853,8 @@ AC_SUBST(EXTRAS_ROOT)
1850AC_SUBST(EXTRA_NETOBJS) 1853AC_SUBST(EXTRA_NETOBJS)
1851AC_SUBST(DEPLIBS) 1854AC_SUBST(DEPLIBS)
1852 1855
1853AM_GNU_GETTEXT([external], [need-ngettext]) 1856dnl AM_GNU_GETTEXT([external], [need-ngettext])
1854AM_GNU_GETTEXT_VERSION(0.15) 1857dnl AM_GNU_GETTEXT_VERSION(0.15)
1855 1858
1856dnl Check for Redhat spopen problem 1859dnl Check for Redhat spopen problem
1857dnl Weird problem where ECHILD is returned from a wait call in error 1860dnl Weird problem where ECHILD is returned from a wait call in error
diff --git a/plugins/Makefile.am b/plugins/Makefile.am
index 49086b7a..d43c1971 100644
--- a/plugins/Makefile.am
+++ b/plugins/Makefile.am
@@ -38,19 +38,27 @@ check_tcp_programs = check_ftp check_imap check_nntp check_pop \
38EXTRA_PROGRAMS = check_mysql check_radius check_pgsql check_snmp check_hpjd \ 38EXTRA_PROGRAMS = check_mysql check_radius check_pgsql check_snmp check_hpjd \
39 check_swap check_fping check_ldap check_game check_dig \ 39 check_swap check_fping check_ldap check_game check_dig \
40 check_nagios check_by_ssh check_dns check_nt check_ide_smart \ 40 check_nagios check_by_ssh check_dns check_nt check_ide_smart \
41 check_procs check_mysql_query check_apt check_dbi check_curl 41 check_procs check_mysql_query check_apt check_dbi check_curl \
42 \
43 tests/test_check_swap
42 44
43SUBDIRS = picohttpparser 45SUBDIRS = picohttpparser
44 46
45EXTRA_DIST = t tests 47np_test_scripts = tests/test_check_swap.t
48
49EXTRA_DIST = t tests $(np_test_scripts) check_swap.d
46 50
47PLUGINHDRS = common.h 51PLUGINHDRS = common.h
48 52
49noinst_LIBRARIES = libnpcommon.a 53noinst_LIBRARIES = libnpcommon.a
54noinst_PROGRAMS = @EXTRA_PLUGIN_TESTS@
55# These two lines support "make check", but we use "make test"
56check_PROGRAMS = @EXTRA_PLUGIN_TESTS@
50 57
51libnpcommon_a_SOURCES = utils.c netutils.c sslutils.c runcmd.c \ 58libnpcommon_a_SOURCES = utils.c netutils.c sslutils.c runcmd.c \
52 popen.c utils.h netutils.h popen.h common.h runcmd.c runcmd.h 59 popen.c utils.h netutils.h popen.h common.h runcmd.c runcmd.h
53 60
61
54BASEOBJS = libnpcommon.a ../lib/libmonitoringplug.a ../gl/libgnu.a $(LIB_CRYPTO) 62BASEOBJS = libnpcommon.a ../lib/libmonitoringplug.a ../gl/libgnu.a $(LIB_CRYPTO)
55NETOBJS = $(BASEOBJS) $(EXTRA_NETOBLS) 63NETOBJS = $(BASEOBJS) $(EXTRA_NETOBLS)
56NETLIBS = $(NETOBJS) $(SOCKETLIBS) 64NETLIBS = $(NETOBJS) $(SOCKETLIBS)
@@ -58,7 +66,10 @@ SSLOBJS = $(BASEOBJS) $(NETLIBS) $(SSLLIBS) $(LIB_CRYPTO)
58 66
59TESTS_ENVIRONMENT = perl -I $(top_builddir) -I $(top_srcdir) 67TESTS_ENVIRONMENT = perl -I $(top_builddir) -I $(top_srcdir)
60 68
61TESTS = @PLUGIN_TEST@ 69tap_ldflags = -L$(top_srcdir)/tap
70
71TESTS = @PLUGIN_TEST@ @EXTRA_PLUGIN_TESTS@
72
62 73
63test: 74test:
64 perl -I $(top_builddir) -I $(top_srcdir) ../test.pl 75 perl -I $(top_builddir) -I $(top_srcdir) ../test.pl
@@ -107,6 +118,7 @@ check_real_LDADD = $(NETLIBS)
107check_snmp_LDADD = $(BASEOBJS) 118check_snmp_LDADD = $(BASEOBJS)
108check_smtp_LDADD = $(SSLOBJS) 119check_smtp_LDADD = $(SSLOBJS)
109check_ssh_LDADD = $(NETLIBS) 120check_ssh_LDADD = $(NETLIBS)
121check_swap_SOURCES = check_swap.c check_swap.d/swap.c
110check_swap_LDADD = $(MATHLIBS) $(BASEOBJS) 122check_swap_LDADD = $(MATHLIBS) $(BASEOBJS)
111check_tcp_LDADD = $(SSLOBJS) 123check_tcp_LDADD = $(SSLOBJS)
112check_time_LDADD = $(NETLIBS) 124check_time_LDADD = $(NETLIBS)
@@ -122,6 +134,9 @@ if !HAVE_UTMPX
122check_users_LDADD += popen.o 134check_users_LDADD += popen.o
123endif 135endif
124 136
137tests_test_check_swap_LDADD = $(BASEOBJS) $(tap_ldflags) -ltap
138tests_test_check_swap_SOURCES = tests/test_check_swap.c check_swap.d/swap.c
139
125############################################################################## 140##############################################################################
126# secondary dependencies 141# secondary dependencies
127 142
diff --git a/plugins/check_swap.c b/plugins/check_swap.c
index e7ee785d..c3199ab7 100644
--- a/plugins/check_swap.c
+++ b/plugins/check_swap.c
@@ -1,607 +1,335 @@
1/***************************************************************************** 1/*****************************************************************************
2* 2 *
3* Monitoring check_swap plugin 3 * Monitoring check_swap plugin
4* 4 *
5* License: GPL 5 * License: GPL
6* Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net) 6 * Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
7* Copyright (c) 2000-2024 Monitoring Plugins Development Team 7 * Copyright (c) 2000-2024 Monitoring Plugins Development Team
8* 8 *
9* Description: 9 * Description:
10* 10 *
11* This file contains the check_swap plugin 11 * This file contains the check_swap plugin
12* 12 *
13* 13 *
14* This program is free software: you can redistribute it and/or modify 14 * This program is free software: you can redistribute it and/or modify
15* it under the terms of the GNU General Public License as published by 15 * it under the terms of the GNU General Public License as published by
16* the Free Software Foundation, either version 3 of the License, or 16 * the Free Software Foundation, either version 3 of the License, or
17* (at your option) any later version. 17 * (at your option) any later version.
18* 18 *
19* This program is distributed in the hope that it will be useful, 19 * This program is distributed in the hope that it will be useful,
20* but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22* GNU General Public License for more details. 22 * GNU General Public License for more details.
23* 23 *
24* You should have received a copy of the GNU General Public License 24 * You should have received a copy of the GNU General Public License
25* along with this program. If not, see <http://www.gnu.org/licenses/>. 25 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26* 26 *
27* 27 *
28*****************************************************************************/ 28 *****************************************************************************/
29 29
30#include <stdint.h>
30const char *progname = "check_swap"; 31const char *progname = "check_swap";
31const char *copyright = "2000-2024"; 32const char *copyright = "2000-2024";
32const char *email = "devel@monitoring-plugins.org"; 33const char *email = "devel@monitoring-plugins.org";
33 34
34#include "common.h"
35#include "popen.h"
36#include "utils.h"
37
38#ifdef HAVE_DECL_SWAPCTL 35#ifdef HAVE_DECL_SWAPCTL
39# ifdef HAVE_SYS_PARAM_H 36# ifdef HAVE_SYS_PARAM_H
40# include <sys/param.h> 37# include <sys/param.h>
41# endif 38# endif
42# ifdef HAVE_SYS_SWAP_H 39# ifdef HAVE_SYS_SWAP_H
43# include <sys/swap.h> 40# include <sys/swap.h>
44# endif 41# endif
45# ifdef HAVE_SYS_STAT_H 42# ifdef HAVE_SYS_STAT_H
46# include <sys/stat.h> 43# include <sys/stat.h>
47# endif 44# endif
48#endif 45#endif
49 46
50#ifndef SWAP_CONVERSION 47#include "./check_swap.d/check_swap.h"
51# define SWAP_CONVERSION 1 48#include "./utils.h"
52#endif
53 49
54typedef struct { 50typedef struct {
55 bool is_percentage; 51 int errorcode;
56 uint64_t value; 52 swap_config config;
57} threshold; 53} swap_config_wrapper;
58
59int check_swap (float free_swap_mb, float total_swap_mb);
60int process_arguments (int argc, char **argv);
61int validate_arguments (void);
62void print_usage (void);
63void print_help (void);
64
65threshold warn;
66threshold crit;
67int verbose;
68bool allswaps = false;
69int no_swap_state = STATE_CRITICAL;
70
71int
72main (int argc, char **argv)
73{
74 unsigned int percent_used, percent;
75 uint64_t total_swap_mb = 0, used_swap_mb = 0, free_swap_mb = 0;
76 uint64_t dsktotal_mb = 0, dskused_mb = 0, dskfree_mb = 0;
77 uint64_t tmp_KB = 0;
78 int result = STATE_UNKNOWN;
79 char input_buffer[MAX_INPUT_BUFFER];
80#ifdef HAVE_PROC_MEMINFO
81 FILE *fp;
82#else
83 int conv_factor = SWAP_CONVERSION;
84# ifdef HAVE_SWAP
85 char *temp_buffer;
86 char *swap_command;
87 char *swap_format;
88# else
89# ifdef HAVE_DECL_SWAPCTL
90 int i=0, nswaps=0, swapctl_res=0;
91# ifdef CHECK_SWAP_SWAPCTL_SVR4
92 swaptbl_t *tbl=NULL;
93 swapent_t *ent=NULL;
94# else
95# ifdef CHECK_SWAP_SWAPCTL_BSD
96 struct swapent *ent;
97# endif /* CHECK_SWAP_SWAPCTL_BSD */
98# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
99# endif /* HAVE_DECL_SWAPCTL */
100# endif
101#endif
102 char str[32];
103 char *status;
104 54
105 setlocale (LC_ALL, ""); 55static swap_config_wrapper process_arguments(int argc, char **argv);
106 bindtextdomain (PACKAGE, LOCALEDIR); 56void print_usage(void);
107 textdomain (PACKAGE); 57static void print_help(swap_config /*config*/);
108 58
109 status = strdup (""); 59int verbose;
110
111 /* Parse extra opts if any */
112 argv=np_extra_opts (&argc, argv, progname);
113 60
114 if (process_arguments (argc, argv) == ERROR) 61#define HUNDRED_PERCENT 100
115 usage4 (_("Could not parse arguments"));
116 62
117#ifdef HAVE_PROC_MEMINFO 63#define BYTES_TO_KiB(number) (number / 1024)
118 if (verbose >= 3) { 64#define BYTES_TO_MiB(number) (BYTES_TO_KiB(number) / 1024)
119 printf("Reading PROC_MEMINFO at %s\n", PROC_MEMINFO);
120 }
121 fp = fopen (PROC_MEMINFO, "r");
122 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
123 /*
124 * The following sscanf call looks for a line looking like: "Swap: 123 123 123"
125 * On which kind of system this format exists, I can not say, but I wanted to
126 * document this for people who are not adapt with sscanf anymore, like me
127 */
128 if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %lu %lu %lu", &dsktotal_mb, &dskused_mb, &dskfree_mb) == 3) {
129 dsktotal_mb = dsktotal_mb / (1024 * 1024); /* Apply conversion */
130 dskused_mb = dskused_mb / (1024 * 1024);
131 dskfree_mb = dskfree_mb / (1024 * 1024);
132 total_swap_mb += dsktotal_mb;
133 used_swap_mb += dskused_mb;
134 free_swap_mb += dskfree_mb;
135 if (allswaps) {
136 if (dsktotal_mb == 0)
137 percent=100.0;
138 else
139 percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
140 result = max_state (result, check_swap (dskfree_mb, dsktotal_mb));
141 if (verbose)
142 xasprintf (&status, "%s [%lu (%d%%)]", status, dskfree_mb, 100 - percent);
143 }
144 }
145 65
146 /* 66int main(int argc, char **argv) {
147 * The following sscanf call looks for lines looking like: "SwapTotal: 123" and "SwapFree: 123" 67 setlocale(LC_ALL, "");
148 * This format exists at least on Debian Linux with a 5.* kernel 68 bindtextdomain(PACKAGE, LOCALEDIR);
149 */ 69 textdomain(PACKAGE);
150 else if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%[TotalFreCchd]%*[:] %lu %*[k]%*[B]", str, &tmp_KB)) {
151 if (verbose >= 3) {
152 printf("Got %s with %lu\n", str, tmp_KB);
153 }
154 /* I think this part is always in Kb, so convert to mb */
155 if (strcmp ("Total", str) == 0) {
156 dsktotal_mb = tmp_KB / 1024;
157 }
158 else if (strcmp ("Free", str) == 0) {
159 dskfree_mb = dskfree_mb + tmp_KB / 1024;
160 }
161 else if (strcmp ("Cached", str) == 0) {
162 dskfree_mb = dskfree_mb + tmp_KB / 1024;
163 }
164 }
165 }
166 fclose(fp);
167 dskused_mb = dsktotal_mb - dskfree_mb;
168 total_swap_mb = dsktotal_mb;
169 used_swap_mb = dskused_mb;
170 free_swap_mb = dskfree_mb;
171#else
172# ifdef HAVE_SWAP
173 xasprintf(&swap_command, "%s", SWAP_COMMAND);
174 xasprintf(&swap_format, "%s", SWAP_FORMAT);
175
176/* These override the command used if a summary (and thus ! allswaps) is required */
177/* The summary flag returns more accurate information about swap usage on these OSes */
178# ifdef _AIX
179 if (!allswaps) {
180 xasprintf(&swap_command, "%s", "/usr/sbin/lsps -s");
181 xasprintf(&swap_format, "%s", "%lu%*s %lu");
182 conv_factor = 1;
183 }
184# endif
185 70
186 if (verbose >= 2) 71 char *status;
187 printf (_("Command: %s\n"), swap_command); 72 status = strdup("");
188 if (verbose >= 3)
189 printf (_("Format: %s\n"), swap_format);
190 73
191 child_process = spopen (swap_command); 74 /* Parse extra opts if any */
192 if (child_process == NULL) { 75 argv = np_extra_opts(&argc, argv, progname);
193 printf (_("Could not open pipe: %s\n"), swap_command);
194 return STATE_UNKNOWN;
195 }
196 76
197 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r"); 77 swap_config_wrapper tmp = process_arguments(argc, argv);
198 if (child_stderr == NULL)
199 printf (_("Could not open stderr for %s\n"), swap_command);
200
201 sprintf (str, "%s", "");
202 /* read 1st line */
203 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
204 if (strcmp (swap_format, "") == 0) {
205 temp_buffer = strtok (input_buffer, " \n");
206 while (temp_buffer) {
207 if (strstr (temp_buffer, "blocks"))
208 sprintf (str, "%s %s", str, "%lu");
209 else if (strstr (temp_buffer, "dskfree"))
210 sprintf (str, "%s %s", str, "%lu");
211 else
212 sprintf (str, "%s %s", str, "%*s");
213 temp_buffer = strtok (NULL, " \n");
214 }
215 }
216 78
217/* If different swap command is used for summary switch, need to read format differently */ 79 if (tmp.errorcode != OK) {
218# ifdef _AIX 80 usage4(_("Could not parse arguments"));
219 if (!allswaps) {
220 fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
221 sscanf (input_buffer, swap_format, &total_swap_mb, &used_swap_mb);
222 free_swap_mb = total_swap_mb * (100 - used_swap_mb) /100;
223 used_swap_mb = total_swap_mb - free_swap_mb;
224 if (verbose >= 3)
225 printf (_("total=%.0f, used=%.0f, free=%.0f\n"), total_swap_mb, used_swap_mb, free_swap_mb);
226 } else {
227# endif
228 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
229 sscanf (input_buffer, swap_format, &dsktotal_mb, &dskfree_mb);
230
231 dsktotal_mb = dsktotal_mb / conv_factor;
232 /* AIX lists percent used, so this converts to dskfree in MBs */
233# ifdef _AIX
234 dskfree_mb = dsktotal_mb * (100 - dskfree_mb) / 100;
235# else
236 dskfree_mb = dskfree_mb / conv_factor;
237# endif
238 if (verbose >= 3)
239 printf (_("total=%.0f, free=%.0f\n"), dsktotal_mb, dskfree_mb);
240
241 dskused_mb = dsktotal_mb - dskfree_mb;
242 total_swap_mb += dsktotal_mb;
243 used_swap_mb += dskused_mb;
244 free_swap_mb += dskfree_mb;
245 if (allswaps) {
246 percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
247 result = max_state (result, check_swap (dskfree_mb, dsktotal_mb));
248 if (verbose)
249 xasprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
250 }
251 }
252# ifdef _AIX
253 } 81 }
254# endif
255
256 /* If we get anything on STDERR, at least set warning */
257 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
258 result = max_state (result, STATE_WARNING);
259
260 /* close stderr */
261 (void) fclose (child_stderr);
262
263 /* close the pipe */
264 if (spclose (child_process))
265 result = max_state (result, STATE_WARNING);
266# else
267# ifdef CHECK_SWAP_SWAPCTL_SVR4
268
269 /* get the number of active swap devices */
270 if((nswaps=swapctl(SC_GETNSWP, NULL))== -1)
271 die(STATE_UNKNOWN, _("Error getting swap devices\n") );
272 82
273 if(nswaps == 0) 83 swap_config config = tmp.config;
274 die(STATE_OK, _("SWAP OK: No swap devices defined\n"));
275 84
276 if(verbose >= 3) 85 swap_result data = get_swap_data(config);
277 printf("Found %d swap device(s)\n", nswaps);
278 86
279 /* initialize swap table + entries */ 87 double percent_used;
280 tbl=(swaptbl_t*)malloc(sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
281 88
282 if(tbl==NULL) 89 /* if total_swap_mb == 0, let's not divide by 0 */
283 die(STATE_UNKNOWN, _("malloc() failed!\n")); 90 if (data.metrics.total != 0) {
284 91 percent_used = HUNDRED_PERCENT * ((double)data.metrics.used) / ((double)data.metrics.total);
285 memset(tbl, 0, sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps)); 92 } else {
286 tbl->swt_n=nswaps; 93 printf(_("SWAP %s - Swap is either disabled, not present, or of zero "
287 for(i=0;i<nswaps;i++){ 94 "size."),
288 if((tbl->swt_ent[i].ste_path=(char*)malloc(sizeof(char)*MAXPATHLEN)) == NULL) 95 state_text(data.statusCode));
289 die(STATE_UNKNOWN, _("malloc() failed!\n")); 96 exit(config.no_swap_state);
290 } 97 }
291 98
292 /* and now, tally 'em up */ 99 if (verbose) {
293 swapctl_res=swapctl(SC_LIST, tbl); 100 printf("Computed usage percentage: %g\n", percent_used);
294 if(swapctl_res < 0){
295 perror(_("swapctl failed: "));
296 die(STATE_UNKNOWN, _("Error in swapctl call\n"));
297 } 101 }
298 102
299 for(i=0;i<nswaps;i++){ 103 uint64_t warn_print = config.warn.value;
300 dsktotal_mb = (float) tbl->swt_ent[i].ste_pages / SWAP_CONVERSION; 104 if (config.warn.is_percentage) {
301 dskfree_mb = (float) tbl->swt_ent[i].ste_free / SWAP_CONVERSION; 105 warn_print = config.warn.value * (data.metrics.total / HUNDRED_PERCENT);
302 dskused_mb = ( dsktotal_mb - dskfree_mb ); 106 }
303 107
304 if (verbose >= 3) 108 uint64_t crit_print = config.crit.value;
305 printf ("dsktotal_mb=%.0f dskfree_mb=%.0f dskused_mb=%.0f\n", dsktotal_mb, dskfree_mb, dskused_mb); 109 if (config.crit.is_percentage) {
110 crit_print = config.crit.value * (data.metrics.total / HUNDRED_PERCENT);
111 }
306 112
307 if(allswaps && dsktotal_mb > 0){ 113 char *perfdata = perfdata_uint64("swap", data.metrics.free, "B", true, warn_print, true, crit_print, true, 0, true, data.metrics.total);
308 percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb));
309 result = max_state (result, check_swap (dskfree_mb, dsktotal_mb));
310 if (verbose) {
311 xasprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
312 }
313 }
314 114
315 total_swap_mb += dsktotal_mb; 115 if (verbose > 1) {
316 free_swap_mb += dskfree_mb; 116 printf("Warn threshold value: %" PRIu64 "\n", config.warn.value);
317 used_swap_mb += dskused_mb;
318 } 117 }
319 118
320 /* and clean up after ourselves */ 119 if ((config.warn.is_percentage && (percent_used >= (double)(HUNDRED_PERCENT - config.warn.value))) ||
321 for(i=0;i<nswaps;i++){ 120 config.warn.value >= data.metrics.free) {
322 free(tbl->swt_ent[i].ste_path); 121 data.statusCode = max_state(data.statusCode, STATE_WARNING);
323 } 122 }
324 free(tbl);
325# else
326# ifdef CHECK_SWAP_SWAPCTL_BSD
327
328 /* get the number of active swap devices */
329 nswaps=swapctl(SWAP_NSWAP, NULL, 0);
330 123
331 /* initialize swap table + entries */ 124 if (verbose > 1) {
332 ent=(struct swapent*)malloc(sizeof(struct swapent)*nswaps); 125 printf("Crit threshold value: %" PRIu64 "\n", config.crit.value);
126 }
333 127
334 /* and now, tally 'em up */ 128 if ((config.crit.is_percentage && (percent_used >= (double)(HUNDRED_PERCENT - config.crit.value))) ||
335 swapctl_res=swapctl(SWAP_STATS, ent, nswaps); 129 config.crit.value >= data.metrics.free) {
336 if(swapctl_res < 0){ 130 data.statusCode = max_state(data.statusCode, STATE_CRITICAL);
337 perror(_("swapctl failed: "));
338 die(STATE_UNKNOWN, _("Error in swapctl call\n"));
339 } 131 }
340 132
341 for(i=0;i<nswaps;i++){ 133 printf(_("SWAP %s - %g%% free (%lluMiB out of %lluMiB) %s|%s\n"), state_text(data.statusCode), (HUNDRED_PERCENT - percent_used),
342 dsktotal_mb = (float) ent[i].se_nblks / conv_factor; 134 BYTES_TO_MiB(data.metrics.free), BYTES_TO_MiB(data.metrics.total), status, perfdata);
343 dskused_mb = (float) ent[i].se_inuse / conv_factor;
344 dskfree_mb = ( dsktotal_mb - dskused_mb );
345 135
346 if(allswaps && dsktotal_mb > 0){ 136 exit(data.statusCode);
347 percent = 100 * (((double) dskused_mb) / ((double) dsktotal_mb)); 137}
348 result = max_state (result, check_swap(dskfree_mb, dsktotal_mb));
349 if (verbose) {
350 xasprintf (&status, "%s [%.0f (%d%%)]", status, dskfree_mb, 100 - percent);
351 }
352 }
353 138
354 total_swap_mb += dsktotal_mb; 139int check_swap(float free_swap_mb, float total_swap_mb, swap_config config) {
355 free_swap_mb += dskfree_mb; 140 if (total_swap_mb == 0) {
356 used_swap_mb += dskused_mb; 141 return config.no_swap_state;
357 } 142 }
358 143
359 /* and clean up after ourselves */ 144 uint64_t free_swap = (uint64_t)(free_swap_mb * (1024 * 1024)); /* Convert back to bytes as warn and crit specified in bytes */
360 free(ent);
361
362# endif /* CHECK_SWAP_SWAPCTL_BSD */
363# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
364# endif /* HAVE_SWAP */
365#endif /* HAVE_PROC_MEMINFO */
366 145
367 /* if total_swap_mb == 0, let's not divide by 0 */ 146 if (!config.crit.is_percentage && config.crit.value >= free_swap) {
368 if(total_swap_mb) { 147 return STATE_CRITICAL;
369 percent_used = 100 * ((double) used_swap_mb) / ((double) total_swap_mb); 148 }
370 } else { 149 if (!config.warn.is_percentage && config.warn.value >= free_swap) {
371 percent_used = 100; 150 return STATE_WARNING;
372 status = "- Swap is either disabled, not present, or of zero size. ";
373 } 151 }
374 152
375 result = max_state (result, check_swap(free_swap_mb, total_swap_mb)); 153 uint64_t usage_percentage = (uint64_t)((total_swap_mb - free_swap_mb) / total_swap_mb) * HUNDRED_PERCENT;
376 printf (_("SWAP %s - %d%% free (%dMB out of %dMB) %s|"),
377 state_text (result),
378 (100 - percent_used), (int) free_swap_mb, (int) total_swap_mb, status);
379 154
380 uint64_t warn_print = warn.value; 155 if (config.crit.is_percentage && config.crit.value != 0 && usage_percentage >= (HUNDRED_PERCENT - config.crit.value)) {
381 if (warn.is_percentage) warn_print = warn.value * (total_swap_mb *1024 *1024/100); 156 return STATE_CRITICAL;
382 uint64_t crit_print = crit.value; 157 }
383 if (crit.is_percentage) crit_print = crit.value * (total_swap_mb *1024 *1024/100);
384 158
385 puts (perfdata_uint64 ("swap", free_swap_mb *1024 *1024, "B", 159 if (config.warn.is_percentage && config.warn.value != 0 && usage_percentage >= (HUNDRED_PERCENT - config.warn.value)) {
386 true, warn_print, 160 return STATE_WARNING;
387 true, crit_print, 161 }
388 true, 0,
389 true, (long) total_swap_mb * 1024 * 1024));
390 162
391 return result; 163 return STATE_OK;
392} 164}
393 165
166/* process command-line arguments */
167swap_config_wrapper process_arguments(int argc, char **argv) {
168 swap_config_wrapper conf_wrapper = {.errorcode = OK};
169 conf_wrapper.config = swap_config_init();
394 170
395int 171 if (argc < 2) {
396check_swap(float free_swap_mb, float total_swap_mb) 172 conf_wrapper.errorcode = ERROR;
397{ 173 return conf_wrapper;
398 174 }
399 if (!total_swap_mb) return no_swap_state;
400
401 uint64_t free_swap = free_swap_mb * (1024 * 1024); /* Convert back to bytes as warn and crit specified in bytes */
402 uint64_t usage_percentage = ((total_swap_mb - free_swap_mb) / total_swap_mb) * 100;
403
404 if (warn.value || crit.value) { /* Thresholds defined */
405 if (!crit.is_percentage && crit.value >= free_swap) return STATE_CRITICAL;
406 if (!warn.is_percentage && warn.value >= free_swap) return STATE_WARNING;
407
408 if (crit.is_percentage &&
409 crit.value != 0 &&
410 usage_percentage >= (100 - crit.value))
411 {
412 return STATE_CRITICAL;
413 }
414
415 if (warn.is_percentage &&
416 warn.value != 0 &&
417 usage_percentage >= (100 - warn.value))
418 {
419 return STATE_WARNING;
420 }
421
422 return STATE_OK;
423 } else { /* Without thresholds */
424 return STATE_OK;
425 }
426}
427 175
176 static struct option longopts[] = {{"warning", required_argument, 0, 'w'}, {"critical", required_argument, 0, 'c'},
177 {"allswaps", no_argument, 0, 'a'}, {"no-swap", required_argument, 0, 'n'},
178 {"verbose", no_argument, 0, 'v'}, {"version", no_argument, 0, 'V'},
179 {"help", no_argument, 0, 'h'}, {0, 0, 0, 0}};
428 180
181 while (true) {
182 int option = 0;
183 int option_char = getopt_long(argc, argv, "+?Vvhac:w:n:", longopts, &option);
429 184
430/* process command-line arguments */ 185 if (option_char == -1 || option_char == EOF) {
431int
432process_arguments (int argc, char **argv)
433{
434 int c = 0; /* option character */
435
436 int option = 0;
437 static struct option longopts[] = {
438 {"warning", required_argument, 0, 'w'},
439 {"critical", required_argument, 0, 'c'},
440 {"allswaps", no_argument, 0, 'a'},
441 {"no-swap", required_argument, 0, 'n'},
442 {"verbose", no_argument, 0, 'v'},
443 {"version", no_argument, 0, 'V'},
444 {"help", no_argument, 0, 'h'},
445 {0, 0, 0, 0}
446 };
447
448 while (1) {
449 c = getopt_long (argc, argv, "+?Vvhac:w:n:", longopts, &option);
450
451 if (c == -1 || c == EOF)
452 break; 186 break;
187 }
453 188
454 switch (c) { 189 switch (option_char) {
455 case 'w': /* warning size threshold */ 190 case 'w': /* warning size threshold */
456 { 191 {
457 /* 192 /*
458 * We expect either a positive integer value without a unit, which means 193 * We expect either a positive integer value without a unit, which
459 * the unit is Bytes or a positive integer value and a percentage sign (%), 194 * means the unit is Bytes or a positive integer value and a
460 * which means the value must be with 0 and 100 and is relative to the total swap 195 * percentage sign (%), which means the value must be with 0 and 100
461 */ 196 * and is relative to the total swap
462 size_t length; 197 */
463 length = strlen(optarg); 198 size_t length;
464 199 length = strlen(optarg);
465 if (optarg[length - 1] == '%') { 200
466 /* It's percentage */ 201 if (optarg[length - 1] == '%') {
467 warn.is_percentage = true; 202 /* It's percentage */
468 optarg[length - 1] = '\0'; 203 conf_wrapper.config.warn.is_percentage = true;
469 if (is_uint64(optarg, &warn.value)) { 204 optarg[length - 1] = '\0';
470 if (warn.value > 100) { 205 if (is_uint64(optarg, &conf_wrapper.config.warn.value)) {
471 usage4 (_("Warning threshold percentage must be <= 100!")); 206 if (conf_wrapper.config.warn.value > HUNDRED_PERCENT) {
472 } 207 usage4(_("Warning threshold percentage must be <= 100!"));
473 }
474 break;
475 } else {
476 /* It's Bytes */
477 warn.is_percentage = false;
478 if (is_uint64(optarg, &warn.value)) {
479 break;
480 } else {
481 usage4 (_("Warning threshold be positive integer or percentage!"));
482 } 208 }
483 } 209 }
210 break;
211 } /* It's Bytes */
212 conf_wrapper.config.warn.is_percentage = false;
213 if (is_uint64(optarg, &conf_wrapper.config.warn.value)) {
214 break;
484 } 215 }
216 usage4(_("Warning threshold be positive integer or "
217 "percentage!"));
218 }
485 case 'c': /* critical size threshold */ 219 case 'c': /* critical size threshold */
486 { 220 {
487 /* 221 /*
488 * We expect either a positive integer value without a unit, which means 222 * We expect either a positive integer value without a unit, which
489 * the unit is Bytes or a positive integer value and a percentage sign (%), 223 * means the unit is Bytes or a positive integer value and a
490 * which means the value must be with 0 and 100 and is relative to the total swap 224 * percentage sign (%), which means the value must be with 0 and 100
491 */ 225 * and is relative to the total swap
492 size_t length; 226 */
493 length = strlen(optarg); 227 size_t length;
494 228 length = strlen(optarg);
495 if (optarg[length - 1] == '%') { 229
496 /* It's percentage */ 230 if (optarg[length - 1] == '%') {
497 crit.is_percentage = true; 231 /* It's percentage */
498 optarg[length - 1] = '\0'; 232 conf_wrapper.config.crit.is_percentage = true;
499 if (is_uint64(optarg, &crit.value)) { 233 optarg[length - 1] = '\0';
500 if (crit.value> 100) { 234 if (is_uint64(optarg, &conf_wrapper.config.crit.value)) {
501 usage4 (_("Critical threshold percentage must be <= 100!")); 235 if (conf_wrapper.config.crit.value > HUNDRED_PERCENT) {
502 } 236 usage4(_("Critical threshold percentage must be <= 100!"));
503 }
504 break;
505 } else {
506 /* It's Bytes */
507 crit.is_percentage = false;
508 if (is_uint64(optarg, &crit.value)) {
509 break;
510 } else {
511 usage4 (_("Critical threshold be positive integer or percentage!"));
512 } 237 }
513 } 238 }
514 } 239 break;
515 case 'a': /* all swap */ 240 } /* It's Bytes */
516 allswaps = true; 241 conf_wrapper.config.crit.is_percentage = false;
242 if (is_uint64(optarg, &conf_wrapper.config.crit.value)) {
243 break;
244 }
245 usage4(_("Critical threshold be positive integer or "
246 "percentage!"));
247 }
248 case 'a': /* all swap */
249 conf_wrapper.config.allswaps = true;
517 break; 250 break;
518 case 'n': 251 case 'n':
519 if ((no_swap_state = mp_translate_state(optarg)) == ERROR) { 252 if ((conf_wrapper.config.no_swap_state = mp_translate_state(optarg)) == ERROR) {
520 usage4 (_("no-swap result must be a valid state name (OK, WARNING, CRITICAL, UNKNOWN) or integer (0-3).")); 253 usage4(_("no-swap result must be a valid state name (OK, "
254 "WARNING, CRITICAL, UNKNOWN) or integer (0-3)."));
521 } 255 }
522 break; 256 break;
523 case 'v': /* verbose */ 257 case 'v': /* verbose */
524 verbose++; 258 verbose++;
525 break; 259 break;
526 case 'V': /* version */ 260 case 'V': /* version */
527 print_revision (progname, NP_VERSION); 261 print_revision(progname, NP_VERSION);
528 exit (STATE_UNKNOWN); 262 exit(STATE_UNKNOWN);
529 case 'h': /* help */ 263 case 'h': /* help */
530 print_help (); 264 print_help(conf_wrapper.config);
531 exit (STATE_UNKNOWN); 265 exit(STATE_UNKNOWN);
532 case '?': /* error */ 266 case '?': /* error */
533 usage5 (); 267 usage5();
534 } 268 }
535 } 269 }
536 270
537 c = optind; 271 if (conf_wrapper.config.warn.value == 0 && conf_wrapper.config.crit.value == 0) {
538 if (c == argc) 272 conf_wrapper.errorcode = ERROR;
539 return validate_arguments (); 273 return conf_wrapper;
540 274 }
541 return validate_arguments (); 275 if ((conf_wrapper.config.warn.is_percentage == conf_wrapper.config.crit.is_percentage) &&
542} 276 (conf_wrapper.config.warn.value < conf_wrapper.config.crit.value)) {
543 277 /* This is NOT triggered if warn and crit are different units, e.g warn
544 278 * is percentage and crit is absolute. We cannot determine the condition
545 279 * at this point since we dont know the value of total swap yet
546int
547validate_arguments (void)
548{
549 if ((warn.is_percentage == crit.is_percentage) && (warn.value < crit.value)) {
550 /* This is NOT triggered if warn and crit are different units, e.g warn is percentage
551 * and crit is absolute. We cannot determine the condition at this point since we
552 * dont know the value of total swap yet
553 */ 280 */
554 usage4(_("Warning should be more than critical")); 281 usage4(_("Warning should be more than critical"));
555 } 282 }
556 return OK;
557}
558
559 283
560 284 return conf_wrapper;
561void
562print_help (void)
563{
564 print_revision (progname, NP_VERSION);
565
566 printf (_(COPYRIGHT), copyright, email);
567
568 printf ("%s\n", _("Check swap space on local machine."));
569
570 printf ("\n\n");
571
572 print_usage ();
573
574 printf (UT_HELP_VRSN);
575 printf (UT_EXTRA_OPTS);
576
577 printf (" %s\n", "-w, --warning=INTEGER");
578 printf (" %s\n", _("Exit with WARNING status if less than INTEGER bytes of swap space are free"));
579 printf (" %s\n", "-w, --warning=PERCENT%");
580 printf (" %s\n", _("Exit with WARNING status if less than PERCENT of swap space is free"));
581 printf (" %s\n", "-c, --critical=INTEGER");
582 printf (" %s\n", _("Exit with CRITICAL status if less than INTEGER bytes of swap space are free"));
583 printf (" %s\n", "-c, --critical=PERCENT%");
584 printf (" %s\n", _("Exit with CRITICAL status if less than PERCENT of swap space is free"));
585 printf (" %s\n", "-a, --allswaps");
586 printf (" %s\n", _("Conduct comparisons for all swap partitions, one by one"));
587 printf (" %s\n", "-n, --no-swap=<ok|warning|critical|unknown>");
588 printf (" %s %s\n", _("Resulting state when there is no swap regardless of thresholds. Default:"), state_text(no_swap_state));
589 printf (UT_VERBOSE);
590
591 printf ("\n");
592 printf ("%s\n", _("Notes:"));
593 printf (" %s\n", _("Both INTEGER and PERCENT thresholds can be specified, they are all checked."));
594 printf (" %s\n", _("Without thresholds, the plugin shows free swap space and performance data, but always returns OK."));
595 printf (" %s\n", _("On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s."));
596
597 printf (UT_SUPPORT);
598} 285}
599 286
287void print_help(swap_config config) {
288 print_revision(progname, NP_VERSION);
289
290 printf(_(COPYRIGHT), copyright, email);
291
292 printf("%s\n", _("Check swap space on local machine."));
293
294 printf("\n\n");
295
296 print_usage();
297
298 printf(UT_HELP_VRSN);
299 printf(UT_EXTRA_OPTS);
300
301 printf(" %s\n", "-w, --warning=INTEGER");
302 printf(" %s\n", _("Exit with WARNING status if less than INTEGER bytes "
303 "of swap space are free"));
304 printf(" %s\n", "-w, --warning=PERCENT%");
305 printf(" %s\n", _("Exit with WARNING status if less than PERCENT of "
306 "swap space is free"));
307 printf(" %s\n", "-c, --critical=INTEGER");
308 printf(" %s\n", _("Exit with CRITICAL status if less than INTEGER bytes "
309 "of swap space are free"));
310 printf(" %s\n", "-c, --critical=PERCENT%");
311 printf(" %s\n", _("Exit with CRITICAL status if less than PERCENT of "
312 "swap space is free"));
313 printf(" %s\n", "-a, --allswaps");
314 printf(" %s\n", _("Conduct comparisons for all swap partitions, one by one"));
315 printf(" %s\n", "-n, --no-swap=<ok|warning|critical|unknown>");
316 printf(" %s %s\n",
317 _("Resulting state when there is no swap regardless of thresholds. "
318 "Default:"),
319 state_text(config.no_swap_state));
320 printf(UT_VERBOSE);
321
322 printf("\n");
323 printf("%s\n", _("Notes:"));
324 printf(" %s\n", _("Both INTEGER and PERCENT thresholds can be specified, "
325 "they are all checked."));
326 printf(" %s\n", _("On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s."));
327
328 printf(UT_SUPPORT);
329}
600 330
601void 331void print_usage(void) {
602print_usage (void) 332 printf("%s\n", _("Usage:"));
603{ 333 printf(" %s [-av] -w <percent_free>%% -c <percent_free>%%\n", progname);
604 printf ("%s\n", _("Usage:")); 334 printf(" -w <bytes_free> -c <bytes_free> [-n <state>]\n");
605 printf (" %s [-av] [-w <percent_free>%%] [-c <percent_free>%%]\n",progname);
606 printf (" [-w <bytes_free>] [-c <bytes_free>] [-n <state>]\n");
607} 335}
diff --git a/plugins/check_swap.d/check_swap.h b/plugins/check_swap.d/check_swap.h
new file mode 100644
index 00000000..9e8be75f
--- /dev/null
+++ b/plugins/check_swap.d/check_swap.h
@@ -0,0 +1,44 @@
1#ifndef CHECK_SWAP_H
2#define CHECK_SWAP_H
3
4#include "../common.h"
5
6#ifndef SWAP_CONVERSION
7# define SWAP_CONVERSION 1
8#endif
9
10typedef struct {
11 bool is_percentage;
12 uint64_t value;
13} threshold;
14
15typedef struct {
16 unsigned long long free; // Free swap in Bytes!
17 unsigned long long used; // Used swap in Bytes!
18 unsigned long long total; // Total swap size, you guessed it, in Bytes!
19} swap_metrics;
20
21typedef struct {
22 int errorcode;
23 int statusCode;
24 swap_metrics metrics;
25} swap_result;
26
27typedef struct {
28 bool allswaps;
29 int no_swap_state;
30 threshold warn;
31 threshold crit;
32 bool on_aix;
33 int conversion_factor;
34} swap_config;
35
36swap_config swap_config_init(void);
37
38swap_result get_swap_data(swap_config config);
39swap_result getSwapFromProcMeminfo(char path_to_proc_meminfo[]);
40swap_result getSwapFromSwapCommand(swap_config config, const char swap_command[], const char swap_format[]);
41swap_result getSwapFromSwapctl_BSD(swap_config config);
42swap_result getSwapFromSwap_SRV4(swap_config config);
43
44#endif
diff --git a/plugins/check_swap.d/swap.c b/plugins/check_swap.d/swap.c
new file mode 100644
index 00000000..18db210c
--- /dev/null
+++ b/plugins/check_swap.d/swap.c
@@ -0,0 +1,432 @@
1#include "./check_swap.d/check_swap.h"
2#include "../popen.h"
3#include "../utils.h"
4
5extern int verbose;
6
7swap_config swap_config_init(void) {
8 swap_config tmp = {0};
9 tmp.allswaps = false;
10 tmp.no_swap_state = STATE_CRITICAL;
11 tmp.conversion_factor = SWAP_CONVERSION;
12
13#ifdef _AIX
14 tmp.on_aix = true;
15#else
16 tmp.on_aix = false;
17#endif
18
19 return tmp;
20}
21
22swap_result get_swap_data(swap_config config) {
23#ifdef HAVE_PROC_MEMINFO
24 if (verbose >= 3) {
25 printf("Reading PROC_MEMINFO at %s\n", PROC_MEMINFO);
26 }
27
28 return getSwapFromProcMeminfo(PROC_MEMINFO);
29#else
30# ifdef HAVE_SWAP
31 if (verbose >= 3) {
32 printf("Using swap command %s with format: %s\n", SWAP_COMMAND, SWAP_FORMAT);
33 }
34
35 /* These override the command used if a summary (and thus ! allswaps) is
36 * required
37 * The summary flag returns more accurate information about swap usage on these
38 * OSes */
39 if (config.on_aix && !config.allswaps) {
40
41 config.conversion_factor = 1;
42
43 return getSwapFromSwapCommand(config, "/usr/sbin/lsps -s", "%lu%*s %lu");
44 } else {
45 return getSwapFromSwapCommand(config, SWAP_COMMAND, SWAP_FORMAT);
46 }
47# else
48# ifdef CHECK_SWAP_SWAPCTL_SVR4
49 return getSwapFromSwapctl_SRV4();
50# else
51# ifdef CHECK_SWAP_SWAPCTL_BSD
52 return getSwapFromSwapctl_BSD();
53# else
54# error No way found to retrieve swap
55# endif /* CHECK_SWAP_SWAPCTL_BSD */
56# endif /* CHECK_SWAP_SWAPCTL_SVR4 */
57# endif /* HAVE_SWAP */
58#endif /* HAVE_PROC_MEMINFO */
59}
60
61swap_result getSwapFromProcMeminfo(char proc_meminfo[]) {
62 FILE *meminfo_file_ptr;
63 meminfo_file_ptr = fopen(proc_meminfo, "r");
64
65 swap_result result = {0};
66 result.statusCode = STATE_OK;
67
68 uint64_t swap_total = 0;
69 uint64_t swap_used = 0;
70 uint64_t swap_free = 0;
71
72 char input_buffer[MAX_INPUT_BUFFER];
73 char str[32];
74
75 while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, meminfo_file_ptr)) {
76 uint64_t tmp_KB = 0;
77
78 /*
79 * The following sscanf call looks for a line looking like: "Swap: 123
80 * 123 123" On which kind of system this format exists, I can not say,
81 * but I wanted to document this for people who are not adapt with
82 * sscanf anymore, like me
83 * Also the units used here are unclear and probably wrong
84 */
85 if (sscanf(input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %lu %lu %lu", &swap_total, &swap_used, &swap_free) == 3) {
86
87 result.metrics.total += swap_total;
88 result.metrics.used += swap_used;
89 result.metrics.free += swap_free;
90
91 /*
92 * The following sscanf call looks for lines looking like:
93 * "SwapTotal: 123" and "SwapFree: 123" This format exists at least
94 * on Debian Linux with a 5.* kernel
95 */
96 } else if (sscanf(input_buffer,
97 "%*[S]%*[w]%*[a]%*[p]%[TotalFreCchd]%*[:] %lu "
98 "%*[k]%*[B]",
99 str, &tmp_KB)) {
100
101 if (verbose >= 3) {
102 printf("Got %s with %lu\n", str, tmp_KB);
103 }
104
105 /* I think this part is always in Kb, so convert to bytes */
106 if (strcmp("Total", str) == 0) {
107 swap_total = tmp_KB * 1024;
108 } else if (strcmp("Free", str) == 0) {
109 swap_free = swap_free + tmp_KB * 1024;
110 } else if (strcmp("Cached", str) == 0) {
111 swap_free = swap_free + tmp_KB * 1024;
112 }
113 }
114 }
115
116 fclose(meminfo_file_ptr);
117
118 result.metrics.total = swap_total;
119 result.metrics.used = swap_total - swap_free;
120 result.metrics.free = swap_free;
121
122 return result;
123}
124
125swap_result getSwapFromSwapCommand(swap_config config, const char swap_command[], const char swap_format[]) {
126 swap_result result = {0};
127
128 char *temp_buffer;
129
130 if (verbose >= 2) {
131 printf(_("Command: %s\n"), swap_command);
132 }
133 if (verbose >= 3) {
134 printf(_("Format: %s\n"), swap_format);
135 }
136
137 child_process = spopen(swap_command);
138 if (child_process == NULL) {
139 printf(_("Could not open pipe: %s\n"), swap_command);
140 swap_result tmp = {
141 .errorcode = STATE_UNKNOWN,
142 };
143 return tmp;
144 }
145
146 child_stderr = fdopen(child_stderr_array[fileno(child_process)], "r");
147 if (child_stderr == NULL) {
148 printf(_("Could not open stderr for %s\n"), swap_command);
149 }
150
151 char str[32] = {0};
152 char input_buffer[MAX_INPUT_BUFFER];
153
154 /* read 1st line */
155 fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process);
156 if (strcmp(swap_format, "") == 0) {
157 temp_buffer = strtok(input_buffer, " \n");
158 while (temp_buffer) {
159 if (strstr(temp_buffer, "blocks")) {
160 sprintf(str, "%s %s", str, "%lu");
161 } else if (strstr(temp_buffer, "dskfree")) {
162 sprintf(str, "%s %s", str, "%lu");
163 } else {
164 sprintf(str, "%s %s", str, "%*s");
165 }
166 temp_buffer = strtok(NULL, " \n");
167 }
168 }
169
170 double total_swap_mb = 0;
171 double free_swap_mb = 0;
172 double used_swap_mb = 0;
173 double dsktotal_mb = 0;
174 double dskused_mb = 0;
175 double dskfree_mb = 0;
176
177 /*
178 * If different swap command is used for summary switch, need to read format
179 * differently
180 */
181 if (config.on_aix && !config.allswaps) {
182 fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
183 sscanf(input_buffer, swap_format, &total_swap_mb, &used_swap_mb);
184 free_swap_mb = total_swap_mb * (100 - used_swap_mb) / 100;
185 used_swap_mb = total_swap_mb - free_swap_mb;
186
187 if (verbose >= 3) {
188 printf(_("total=%.0f, used=%.0f, free=%.0f\n"), total_swap_mb, used_swap_mb, free_swap_mb);
189 }
190 } else {
191 while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
192 sscanf(input_buffer, swap_format, &dsktotal_mb, &dskfree_mb);
193
194 dsktotal_mb = dsktotal_mb / config.conversion_factor;
195 /* AIX lists percent used, so this converts to dskfree in MBs */
196
197 if (config.on_aix) {
198 dskfree_mb = dsktotal_mb * (100 - dskfree_mb) / 100;
199 } else {
200 dskfree_mb = dskfree_mb / config.conversion_factor;
201 }
202
203 if (verbose >= 3) {
204 printf(_("total=%.0f, free=%.0f\n"), dsktotal_mb, dskfree_mb);
205 }
206
207 dskused_mb = dsktotal_mb - dskfree_mb;
208 total_swap_mb += dsktotal_mb;
209 used_swap_mb += dskused_mb;
210 free_swap_mb += dskfree_mb;
211 }
212 }
213
214 result.metrics.free = free_swap_mb * 1024 * 1024;
215 result.metrics.used = used_swap_mb * 1024 * 1024;
216 result.metrics.total = free_swap_mb * 1024 * 1024;
217
218 /* If we get anything on STDERR, at least set warning */
219 while (fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_stderr)) {
220 result.statusCode = max_state(result.statusCode, STATE_WARNING);
221 // TODO Set error here
222 }
223
224 /* close stderr */
225 (void)fclose(child_stderr);
226
227 /* close the pipe */
228 if (spclose(child_process)) {
229 result.statusCode = max_state(result.statusCode, STATE_WARNING);
230 // TODO set error here
231 }
232
233 return result;
234}
235
236#ifndef CHECK_SWAP_SWAPCTL_BSD
237# define CHECK_SWAP_SWAPCTL_BSD
238
239// Stub functionality for BSD stuff, so the compiler always sees the following BSD code
240
241# define SWAP_NSWAP 0
242# define SWAP_STATS 1
243
244int bsd_swapctl(int cmd, const void *arg, int misc) {
245 (void)cmd;
246 (void)arg;
247 (void)misc;
248 return 512;
249}
250
251struct swapent {
252 dev_t se_dev; /* device id */
253 int se_flags; /* entry flags */
254 int se_nblks; /* total blocks */
255 int se_inuse; /* blocks in use */
256 int se_priority; /* priority */
257 char se_path[PATH_MAX]; /* path to entry */
258};
259
260#else
261# define bsd_swapctl swapctl
262#endif
263
264swap_result getSwapFromSwapctl_BSD(swap_config config) {
265 /* get the number of active swap devices */
266 int nswaps = bsd_swapctl(SWAP_NSWAP, NULL, 0);
267
268 /* initialize swap table + entries */
269 struct swapent *ent = (struct swapent *)malloc(sizeof(struct swapent) * (unsigned long)nswaps);
270
271 /* and now, tally 'em up */
272 int swapctl_res = bsd_swapctl(SWAP_STATS, ent, nswaps);
273 if (swapctl_res < 0) {
274 perror(_("swapctl failed: "));
275 die(STATE_UNKNOWN, _("Error in swapctl call\n"));
276 }
277
278 double dsktotal_mb = 0.0;
279 double dskfree_mb = 0.0;
280 double dskused_mb = 0.0;
281 unsigned long long total_swap_mb = 0;
282 unsigned long long free_swap_mb = 0;
283 unsigned long long used_swap_mb = 0;
284
285 for (int i = 0; i < nswaps; i++) {
286 dsktotal_mb = (float)ent[i].se_nblks / config.conversion_factor;
287 dskused_mb = (float)ent[i].se_inuse / config.conversion_factor;
288 dskfree_mb = (dsktotal_mb - dskused_mb);
289
290 if (config.allswaps && dsktotal_mb > 0) {
291 double percent = 100 * (((double)dskused_mb) / ((double)dsktotal_mb));
292
293 if (verbose) {
294 printf("[%.0f (%g%%)]", dskfree_mb, 100 - percent);
295 }
296 }
297
298 total_swap_mb += dsktotal_mb;
299 free_swap_mb += dskfree_mb;
300 used_swap_mb += dskused_mb;
301 }
302
303 /* and clean up after ourselves */
304 free(ent);
305
306 swap_result result = {0};
307
308 result.statusCode = OK;
309 result.errorcode = OK;
310
311 result.metrics.total = total_swap_mb * 1024 * 1024;
312 result.metrics.free = free_swap_mb * 1024 * 1024;
313 result.metrics.used = used_swap_mb * 1024 * 1024;
314
315 return result;
316}
317
318#ifndef CHECK_SWAP_SWAPCTL_SVR4
319int srv4_swapctl(int cmd, void *arg) {
320 (void)cmd;
321 (void)arg;
322 return 512;
323}
324
325typedef struct srv4_swapent {
326 char *ste_path; /* name of the swap file */
327 off_t ste_start; /* starting block for swapping */
328 off_t ste_length; /* length of swap area */
329 long ste_pages; /* number of pages for swapping */
330 long ste_free; /* number of ste_pages free */
331 long ste_flags; /* ST_INDEL bit set if swap file */
332 /* is now being deleted */
333} swapent_t;
334
335typedef struct swaptbl {
336 int swt_n; /* number of swapents following */
337 struct srv4_swapent swt_ent[]; /* array of swt_n swapents */
338} swaptbl_t;
339
340# define SC_LIST 2
341# define SC_GETNSWP 3
342
343# ifndef MAXPATHLEN
344# define MAXPATHLEN 2048
345# endif
346
347#else
348# define srv4_swapctl swapctl
349#endif
350
351swap_result getSwapFromSwap_SRV4(swap_config config) {
352 int nswaps = 0;
353
354 /* get the number of active swap devices */
355 if ((nswaps = srv4_swapctl(SC_GETNSWP, NULL)) == -1) {
356 die(STATE_UNKNOWN, _("Error getting swap devices\n"));
357 }
358
359 if (nswaps == 0) {
360 die(STATE_OK, _("SWAP OK: No swap devices defined\n"));
361 }
362
363 if (verbose >= 3) {
364 printf("Found %d swap device(s)\n", nswaps);
365 }
366
367 /* initialize swap table + entries */
368 swaptbl_t *tbl = (swaptbl_t *)malloc(sizeof(swaptbl_t) + (sizeof(swapent_t) * nswaps));
369
370 if (tbl == NULL) {
371 die(STATE_UNKNOWN, _("malloc() failed!\n"));
372 }
373
374 memset(tbl, 0, sizeof(swaptbl_t) + (sizeof(swapent_t) * nswaps));
375 tbl->swt_n = nswaps;
376
377 for (int i = 0; i < nswaps; i++) {
378 if ((tbl->swt_ent[i].ste_path = (char *)malloc(sizeof(char) * MAXPATHLEN)) == NULL) {
379 die(STATE_UNKNOWN, _("malloc() failed!\n"));
380 }
381 }
382
383 /* and now, tally 'em up */
384 int swapctl_res = srv4_swapctl(SC_LIST, tbl);
385 if (swapctl_res < 0) {
386 perror(_("swapctl failed: "));
387 die(STATE_UNKNOWN, _("Error in swapctl call\n"));
388 }
389
390 double dsktotal_mb = 0.0;
391 double dskfree_mb = 0.0;
392 double dskused_mb = 0.0;
393 unsigned long long total_swap_mb = 0;
394 unsigned long long free_swap_mb = 0;
395 unsigned long long used_swap_mb = 0;
396
397 for (int i = 0; i < nswaps; i++) {
398 dsktotal_mb = (float)tbl->swt_ent[i].ste_pages / SWAP_CONVERSION;
399 dskfree_mb = (float)tbl->swt_ent[i].ste_free / SWAP_CONVERSION;
400 dskused_mb = (dsktotal_mb - dskfree_mb);
401
402 if (verbose >= 3) {
403 printf("dsktotal_mb=%.0f dskfree_mb=%.0f dskused_mb=%.0f\n", dsktotal_mb, dskfree_mb, dskused_mb);
404 }
405
406 if (config.allswaps && dsktotal_mb > 0) {
407 double percent = 100 * (((double)dskused_mb) / ((double)dsktotal_mb));
408
409 if (verbose) {
410 printf("[%.0f (%g%%)]", dskfree_mb, 100 - percent);
411 }
412 }
413
414 total_swap_mb += dsktotal_mb;
415 free_swap_mb += dskfree_mb;
416 used_swap_mb += dskused_mb;
417 }
418
419 /* and clean up after ourselves */
420 for (int i = 0; i < nswaps; i++) {
421 free(tbl->swt_ent[i].ste_path);
422 }
423 free(tbl);
424
425 swap_result result = {0};
426 result.errorcode = OK;
427 result.metrics.total = total_swap_mb * 1024 * 1024;
428 result.metrics.free = free_swap_mb * 1024 * 1024;
429 result.metrics.used = used_swap_mb * 1024 * 1024;
430
431 return result;
432}
diff --git a/plugins/tests/test_check_swap.c b/plugins/tests/test_check_swap.c
new file mode 100644
index 00000000..319cadbf
--- /dev/null
+++ b/plugins/tests/test_check_swap.c
@@ -0,0 +1,23 @@
1
2#include "../check_swap.d/check_swap.h"
3#include "../../tap/tap.h"
4
5void print_usage() {};
6void print_help(swap_config config) {
7 (void) config;
8};
9
10const char *progname = "test_check_swap";
11
12int main() {
13 swap_config config = swap_config_init();
14
15 swap_result test_data = getSwapFromProcMeminfo(config, "./var/proc_meminfo");
16
17 plan_tests(4);
18
19 ok(test_data.errorcode == 0, "Test whether we manage to retrieve swap data");
20 ok(test_data.metrics.total == 34233905152, "Is the total Swap correct");
21 ok(test_data.metrics.free == 34233905152, "Is the free Swap correct");
22 ok(test_data.metrics.used == 0, "Is the used Swap correct");
23}
diff --git a/plugins/tests/test_check_swap.t b/plugins/tests/test_check_swap.t
new file mode 100755
index 00000000..826fae01
--- /dev/null
+++ b/plugins/tests/test_check_swap.t
@@ -0,0 +1,6 @@
1#!/usr/bin/perl
2use Test::More;
3if (! -e "./test_check_swap") {
4 plan skip_all => "./test_check_swap not compiled - please enable libtap library to test";
5}
6exec "./test_check_swap";
diff --git a/plugins/tests/var/proc_meminfo b/plugins/tests/var/proc_meminfo
new file mode 100644
index 00000000..6c5a618d
--- /dev/null
+++ b/plugins/tests/var/proc_meminfo
@@ -0,0 +1,55 @@
1MemTotal: 32767776 kB
2MemFree: 1693508 kB
3MemAvailable: 23807480 kB
4Buffers: 438456 kB
5Cached: 19124976 kB
6SwapCached: 0 kB
7Active: 7860680 kB
8Inactive: 18886776 kB
9Active(anon): 6108756 kB
10Inactive(anon): 1364500 kB
11Active(file): 1751924 kB
12Inactive(file): 17522276 kB
13Unevictable: 8548 kB
14Mlocked: 8548 kB
15SwapTotal: 33431548 kB
16SwapFree: 33431548 kB
17Zswap: 0 kB
18Zswapped: 0 kB
19Dirty: 784 kB
20Writeback: 0 kB
21AnonPages: 7139968 kB
22Mapped: 1094916 kB
23Shmem: 284160 kB
24KReclaimable: 3303788 kB
25Slab: 3801908 kB
26SReclaimable: 3303788 kB
27SUnreclaim: 498120 kB
28KernelStack: 32992 kB
29PageTables: 68160 kB
30SecPageTables: 0 kB
31NFS_Unstable: 0 kB
32Bounce: 0 kB
33WritebackTmp: 0 kB
34CommitLimit: 49815436 kB
35Committed_AS: 16888536 kB
36VmallocTotal: 34359738367 kB
37VmallocUsed: 91200 kB
38VmallocChunk: 0 kB
39Percpu: 41472 kB
40HardwareCorrupted: 0 kB
41AnonHugePages: 1708032 kB
42ShmemHugePages: 0 kB
43ShmemPmdMapped: 0 kB
44FileHugePages: 0 kB
45FilePmdMapped: 0 kB
46Unaccepted: 0 kB
47HugePages_Total: 0
48HugePages_Free: 0
49HugePages_Rsvd: 0
50HugePages_Surp: 0
51Hugepagesize: 2048 kB
52Hugetlb: 0 kB
53DirectMap4k: 860468 kB
54DirectMap2M: 20023296 kB
55DirectMap1G: 12582912 kB