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diff --git a/plugins/popen.c b/plugins/popen.c
index 54e63bc..32c9ea4 100644
--- a/plugins/popen.c
+++ b/plugins/popen.c
@@ -1,42 +1,42 @@
1/***************************************************************************** 1/*****************************************************************************
2* 2 *
3* Monitoring Plugins popen 3 * Monitoring Plugins popen
4* 4 *
5* License: GPL 5 * License: GPL
6* Copyright (c) 2005-2007 Monitoring Plugins Development Team 6 * Copyright (c) 2005-2007 Monitoring Plugins Development Team
7* 7 *
8* Description: 8 * Description:
9* 9 *
10* A safe alternative to popen 10 * A safe alternative to popen
11* 11 *
12* Provides spopen and spclose 12 * Provides spopen and spclose
13* 13 *
14* FILE * spopen(const char *); 14 * FILE * spopen(const char *);
15* int spclose(FILE *); 15 * int spclose(FILE *);
16* 16 *
17* Code taken with little modification from "Advanced Programming for the Unix 17 * Code taken with little modification from "Advanced Programming for the Unix
18* Environment" by W. Richard Stevens 18 * Environment" by W. Richard Stevens
19* 19 *
20* This is considered safe in that no shell is spawned, and the environment 20 * This is considered safe in that no shell is spawned, and the environment
21* and path passed to the exec'd program are essentially empty. (popen create 21 * and path passed to the exec'd program are essentially empty. (popen create
22* a shell and passes the environment to it). 22 * a shell and passes the environment to it).
23* 23 *
24* 24 *
25* This program is free software: you can redistribute it and/or modify 25 * This program is free software: you can redistribute it and/or modify
26* it under the terms of the GNU General Public License as published by 26 * it under the terms of the GNU General Public License as published by
27* the Free Software Foundation, either version 3 of the License, or 27 * the Free Software Foundation, either version 3 of the License, or
28* (at your option) any later version. 28 * (at your option) any later version.
29* 29 *
30* This program is distributed in the hope that it will be useful, 30 * This program is distributed in the hope that it will be useful,
31* but WITHOUT ANY WARRANTY; without even the implied warranty of 31 * but WITHOUT ANY WARRANTY; without even the implied warranty of
32* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 32 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
33* GNU General Public License for more details. 33 * GNU General Public License for more details.
34* 34 *
35* You should have received a copy of the GNU General Public License 35 * You should have received a copy of the GNU General Public License
36* along with this program. If not, see <http://www.gnu.org/licenses/>. 36 * along with this program. If not, see <http://www.gnu.org/licenses/>.
37* 37 *
38* 38 *
39*****************************************************************************/ 39 *****************************************************************************/
40 40
41#include "./common.h" 41#include "./common.h"
42#include "./utils.h" 42#include "./utils.h"
@@ -47,46 +47,43 @@ extern pid_t *childpid;
47extern int *child_stderr_array; 47extern int *child_stderr_array;
48extern FILE *child_process; 48extern FILE *child_process;
49 49
50FILE *spopen (const char *); 50FILE *spopen(const char *);
51int spclose (FILE *); 51int spclose(FILE *);
52#ifdef REDHAT_SPOPEN_ERROR 52#ifdef REDHAT_SPOPEN_ERROR
53void popen_sigchld_handler (int); 53void popen_sigchld_handler(int);
54#endif 54#endif
55void popen_timeout_alarm_handler (int); 55void popen_timeout_alarm_handler(int);
56 56
57#include <stdarg.h> /* ANSI C header file */ 57#include <stdarg.h> /* ANSI C header file */
58#include <fcntl.h> 58#include <fcntl.h>
59 59
60#include <limits.h> 60#include <limits.h>
61#include <sys/resource.h> 61#include <sys/resource.h>
62 62
63#ifdef HAVE_SYS_WAIT_H 63#ifdef HAVE_SYS_WAIT_H
64#include <sys/wait.h> 64# include <sys/wait.h>
65#endif 65#endif
66 66
67#ifndef WEXITSTATUS 67#ifndef WEXITSTATUS
68# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8) 68# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
69#endif 69#endif
70 70
71#ifndef WIFEXITED 71#ifndef WIFEXITED
72# define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 72# define WIFEXITED(stat_val) (((stat_val)&255) == 0)
73#endif 73#endif
74 74
75/* 4.3BSD Reno <signal.h> doesn't define SIG_ERR */ 75/* 4.3BSD Reno <signal.h> doesn't define SIG_ERR */
76#if defined(SIG_IGN) && !defined(SIG_ERR) 76#if defined(SIG_IGN) && !defined(SIG_ERR)
77#define SIG_ERR ((Sigfunc *)-1) 77# define SIG_ERR ((Sigfunc *)-1)
78#endif 78#endif
79 79
80 80char *pname = NULL; /* caller can set this from argv[0] */
81char *pname = NULL; /* caller can set this from argv[0] */
82 81
83#ifdef REDHAT_SPOPEN_ERROR 82#ifdef REDHAT_SPOPEN_ERROR
84static volatile int childtermd = 0; 83static volatile int childtermd = 0;
85#endif 84#endif
86 85
87FILE * 86FILE *spopen(const char *cmdstring) {
88spopen (const char *cmdstring)
89{
90 char *env[2]; 87 char *env[2];
91 char *cmd = NULL; 88 char *cmd = NULL;
92 char **argv = NULL; 89 char **argv = NULL;
@@ -96,12 +93,12 @@ spopen (const char *cmdstring)
96 int i = 0, pfd[2], pfderr[2]; 93 int i = 0, pfd[2], pfderr[2];
97 pid_t pid; 94 pid_t pid;
98 95
99#ifdef RLIMIT_CORE 96#ifdef RLIMIT_CORE
100 /* do not leave core files */ 97 /* do not leave core files */
101 struct rlimit limit; 98 struct rlimit limit;
102 getrlimit (RLIMIT_CORE, &limit); 99 getrlimit(RLIMIT_CORE, &limit);
103 limit.rlim_cur = 0; 100 limit.rlim_cur = 0;
104 setrlimit (RLIMIT_CORE, &limit); 101 setrlimit(RLIMIT_CORE, &limit);
105#endif 102#endif
106 103
107 env[0] = strdup("LC_ALL=C"); 104 env[0] = strdup("LC_ALL=C");
@@ -113,182 +110,173 @@ spopen (const char *cmdstring)
113 110
114 /* make copy of command string so strtok() doesn't silently modify it */ 111 /* make copy of command string so strtok() doesn't silently modify it */
115 /* (the calling program may want to access it later) */ 112 /* (the calling program may want to access it later) */
116 cmd = malloc (strlen (cmdstring) + 1); 113 cmd = malloc(strlen(cmdstring) + 1);
117 if (cmd == NULL) 114 if (cmd == NULL)
118 return NULL; 115 return NULL;
119 strcpy (cmd, cmdstring); 116 strcpy(cmd, cmdstring);
120 117
121 /* This is not a shell, so we don't handle "???" */ 118 /* This is not a shell, so we don't handle "???" */
122 if (strstr (cmdstring, "\"")) 119 if (strstr(cmdstring, "\""))
123 return NULL; 120 return NULL;
124 121
125 /* allow single quotes, but only if non-whitesapce doesn't occur on both sides */ 122 /* allow single quotes, but only if non-whitesapce doesn't occur on both sides */
126 if (strstr (cmdstring, " ' ") || strstr (cmdstring, "'''")) 123 if (strstr(cmdstring, " ' ") || strstr(cmdstring, "'''"))
127 return NULL; 124 return NULL;
128 125
129 /* there cannot be more args than characters */ 126 /* there cannot be more args than characters */
130 argc = strlen (cmdstring) + 1; /* add 1 for NULL termination */ 127 argc = strlen(cmdstring) + 1; /* add 1 for NULL termination */
131 argv = malloc (sizeof(char*)*argc); 128 argv = malloc(sizeof(char *) * argc);
132 129
133 if (argv == NULL) { 130 if (argv == NULL) {
134 printf ("%s\n", _("Could not malloc argv array in popen()")); 131 printf("%s\n", _("Could not malloc argv array in popen()"));
135 return NULL; 132 return NULL;
136 } 133 }
137 134
138 /* loop to get arguments to command */ 135 /* loop to get arguments to command */
139 while (cmd) { 136 while (cmd) {
140 str = cmd; 137 str = cmd;
141 str += strspn (str, " \t\r\n"); /* trim any leading whitespace */ 138 str += strspn(str, " \t\r\n"); /* trim any leading whitespace */
142 139
143 if (i >= argc - 2) { 140 if (i >= argc - 2) {
144 printf ("%s\n",_("CRITICAL - You need more args!!!")); 141 printf("%s\n", _("CRITICAL - You need more args!!!"));
145 return (NULL); 142 return (NULL);
146 } 143 }
147 144
148 if (strstr (str, "'") == str) { /* handle SIMPLE quoted strings */ 145 if (strstr(str, "'") == str) { /* handle SIMPLE quoted strings */
149 str++; 146 str++;
150 if (!strstr (str, "'")) 147 if (!strstr(str, "'"))
151 return NULL; /* balanced? */ 148 return NULL; /* balanced? */
152 cmd = 1 + strstr (str, "'"); 149 cmd = 1 + strstr(str, "'");
153 str[strcspn (str, "'")] = 0; 150 str[strcspn(str, "'")] = 0;
154 } 151 } else if (strcspn(str, "'") < strcspn(str, " \t\r\n")) {
155 else if (strcspn(str,"'") < strcspn (str, " \t\r\n")) { 152 /* handle --option='foo bar' strings */
156 /* handle --option='foo bar' strings */
157 tmp = str + strcspn(str, "'") + 1; 153 tmp = str + strcspn(str, "'") + 1;
158 if (!strstr (tmp, "'")) 154 if (!strstr(tmp, "'"))
159 return NULL; /* balanced? */ 155 return NULL; /* balanced? */
160 tmp += strcspn(tmp,"'") + 1; 156 tmp += strcspn(tmp, "'") + 1;
161 *tmp = 0; 157 *tmp = 0;
162 cmd = tmp + 1; 158 cmd = tmp + 1;
163 } else { 159 } else {
164 if (strpbrk (str, " \t\r\n")) { 160 if (strpbrk(str, " \t\r\n")) {
165 cmd = 1 + strpbrk (str, " \t\r\n"); 161 cmd = 1 + strpbrk(str, " \t\r\n");
166 str[strcspn (str, " \t\r\n")] = 0; 162 str[strcspn(str, " \t\r\n")] = 0;
167 } 163 } else {
168 else {
169 cmd = NULL; 164 cmd = NULL;
170 } 165 }
171 } 166 }
172 167
173 if (cmd && strlen (cmd) == strspn (cmd, " \t\r\n")) 168 if (cmd && strlen(cmd) == strspn(cmd, " \t\r\n"))
174 cmd = NULL; 169 cmd = NULL;
175 170
176 argv[i++] = str; 171 argv[i++] = str;
177
178 } 172 }
179 argv[i] = NULL; 173 argv[i] = NULL;
180 174
181 long maxfd = mp_open_max(); 175 long maxfd = mp_open_max();
182 176
183 if (childpid == NULL) { /* first time through */ 177 if (childpid == NULL) { /* first time through */
184 if ((childpid = calloc ((size_t)maxfd, sizeof (pid_t))) == NULL) 178 if ((childpid = calloc((size_t)maxfd, sizeof(pid_t))) == NULL)
185 return (NULL); 179 return (NULL);
186 } 180 }
187 181
188 if (child_stderr_array == NULL) { /* first time through */ 182 if (child_stderr_array == NULL) { /* first time through */
189 if ((child_stderr_array = calloc ((size_t)maxfd, sizeof (int))) == NULL) 183 if ((child_stderr_array = calloc((size_t)maxfd, sizeof(int))) == NULL)
190 return (NULL); 184 return (NULL);
191 } 185 }
192 186
193 if (pipe (pfd) < 0) 187 if (pipe(pfd) < 0)
194 return (NULL); /* errno set by pipe() */ 188 return (NULL); /* errno set by pipe() */
195 189
196 if (pipe (pfderr) < 0) 190 if (pipe(pfderr) < 0)
197 return (NULL); /* errno set by pipe() */ 191 return (NULL); /* errno set by pipe() */
198 192
199#ifdef REDHAT_SPOPEN_ERROR 193#ifdef REDHAT_SPOPEN_ERROR
200 if (signal (SIGCHLD, popen_sigchld_handler) == SIG_ERR) { 194 if (signal(SIGCHLD, popen_sigchld_handler) == SIG_ERR) {
201 usage4 (_("Cannot catch SIGCHLD")); 195 usage4(_("Cannot catch SIGCHLD"));
202 } 196 }
203#endif 197#endif
204 198
205 if ((pid = fork ()) < 0) 199 if ((pid = fork()) < 0)
206 return (NULL); /* errno set by fork() */ 200 return (NULL); /* errno set by fork() */
207 else if (pid == 0) { /* child */ 201 else if (pid == 0) { /* child */
208 close (pfd[0]); 202 close(pfd[0]);
209 if (pfd[1] != STDOUT_FILENO) { 203 if (pfd[1] != STDOUT_FILENO) {
210 dup2 (pfd[1], STDOUT_FILENO); 204 dup2(pfd[1], STDOUT_FILENO);
211 close (pfd[1]); 205 close(pfd[1]);
212 } 206 }
213 close (pfderr[0]); 207 close(pfderr[0]);
214 if (pfderr[1] != STDERR_FILENO) { 208 if (pfderr[1] != STDERR_FILENO) {
215 dup2 (pfderr[1], STDERR_FILENO); 209 dup2(pfderr[1], STDERR_FILENO);
216 close (pfderr[1]); 210 close(pfderr[1]);
217 } 211 }
218 /* close all descriptors in childpid[] */ 212 /* close all descriptors in childpid[] */
219 for (i = 0; i < maxfd; i++) 213 for (i = 0; i < maxfd; i++)
220 if (childpid[i] > 0) 214 if (childpid[i] > 0)
221 close (i); 215 close(i);
222 216
223 execve (argv[0], argv, env); 217 execve(argv[0], argv, env);
224 _exit (0); 218 _exit(0);
225 } 219 }
226 220
227 close (pfd[1]); /* parent */ 221 close(pfd[1]); /* parent */
228 if ((child_process = fdopen (pfd[0], "r")) == NULL) 222 if ((child_process = fdopen(pfd[0], "r")) == NULL)
229 return (NULL); 223 return (NULL);
230 close (pfderr[1]); 224 close(pfderr[1]);
231 225
232 childpid[fileno (child_process)] = pid; /* remember child pid for this fd */ 226 childpid[fileno(child_process)] = pid; /* remember child pid for this fd */
233 child_stderr_array[fileno (child_process)] = pfderr[0]; /* remember STDERR */ 227 child_stderr_array[fileno(child_process)] = pfderr[0]; /* remember STDERR */
234 return (child_process); 228 return (child_process);
235} 229}
236 230
237int 231int spclose(FILE *fp) {
238spclose (FILE * fp)
239{
240 int fd, status; 232 int fd, status;
241 pid_t pid; 233 pid_t pid;
242 234
243 if (childpid == NULL) 235 if (childpid == NULL)
244 return (1); /* popen() has never been called */ 236 return (1); /* popen() has never been called */
245 237
246 fd = fileno (fp); 238 fd = fileno(fp);
247 if ((pid = childpid[fd]) == 0) 239 if ((pid = childpid[fd]) == 0)
248 return (1); /* fp wasn't opened by popen() */ 240 return (1); /* fp wasn't opened by popen() */
249 241
250 childpid[fd] = 0; 242 childpid[fd] = 0;
251 if (fclose (fp) == EOF) 243 if (fclose(fp) == EOF)
252 return (1); 244 return (1);
253 245
254#ifdef REDHAT_SPOPEN_ERROR 246#ifdef REDHAT_SPOPEN_ERROR
255 while (!childtermd); /* wait until SIGCHLD */ 247 while (!childtermd)
248 ; /* wait until SIGCHLD */
256#endif 249#endif
257 250
258 while (waitpid (pid, &status, 0) < 0) 251 while (waitpid(pid, &status, 0) < 0)
259 if (errno != EINTR) 252 if (errno != EINTR)
260 return (1); /* error other than EINTR from waitpid() */ 253 return (1); /* error other than EINTR from waitpid() */
261 254
262 if (WIFEXITED (status)) 255 if (WIFEXITED(status))
263 return (WEXITSTATUS (status)); /* return child's termination status */ 256 return (WEXITSTATUS(status)); /* return child's termination status */
264 257
265 return (1); 258 return (1);
266} 259}
267 260
268#ifdef REDHAT_SPOPEN_ERROR 261#ifdef REDHAT_SPOPEN_ERROR
269void 262void popen_sigchld_handler(int signo) {
270popen_sigchld_handler (int signo)
271{
272 if (signo == SIGCHLD) 263 if (signo == SIGCHLD)
273 childtermd = 1; 264 childtermd = 1;
274} 265}
275#endif 266#endif
276 267
277void 268void popen_timeout_alarm_handler(int signo) {
278popen_timeout_alarm_handler (int signo)
279{
280 int fh; 269 int fh;
281 if (signo == SIGALRM) { 270 if (signo == SIGALRM) {
282 if (child_process != NULL) { 271 if (child_process != NULL) {
283 fh=fileno (child_process); 272 fh = fileno(child_process);
284 if(fh >= 0){ 273 if (fh >= 0) {
285 kill (childpid[fh], SIGKILL); 274 kill(childpid[fh], SIGKILL);
286 } 275 }
287 printf (_("CRITICAL - Plugin timed out after %d seconds\n"), 276 printf(_("CRITICAL - Plugin timed out after %d seconds\n"), timeout_interval);
288 timeout_interval);
289 } else { 277 } else {
290 printf ("%s\n", _("CRITICAL - popen timeout received, but no child process")); 278 printf("%s\n", _("CRITICAL - popen timeout received, but no child process"));
291 } 279 }
292 exit (STATE_CRITICAL); 280 exit(STATE_CRITICAL);
293 } 281 }
294} 282}