1 files changed, 124 insertions, 132 deletions

diff --git a/plugins/runcmd.c b/plugins/runcmd.c
index ed49bb9..7484314 100644
--- a/plugins/runcmd.c
+++ b/plugins/runcmd.c
@@ -1,63 +1,63 @@
 /*****************************************************************************
-* 
-* Monitoring run command utilities
-* 
-* License: GPL
-* Copyright (c) 2005-2006 Monitoring Plugins Development Team
-* 
-* Description :
-* 
-* A simple interface to executing programs from other programs, using an
-* optimized and safe popen()-like implementation. It is considered safe
-* in that no shell needs to be spawned and the environment passed to the
-* execve()'d program is essentially empty.
-* 
-* The code in this file is a derivative of popen.c which in turn was taken
-* from "Advanced Programming for the Unix Environment" by W. Richard Stevens.
-* 
-* Care has been taken to make sure the functions are async-safe. The one
-* function which isn't is np_runcmd_init() which it doesn't make sense to
-* call twice anyway, so the api as a whole should be considered async-safe.
-* 
-* 
-* 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 3 of the License, or
-* (at your option) any later version.
-* 
-* This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
-* 
-* 
-*****************************************************************************/
+ *
+ * Monitoring run command utilities
+ *
+ * License: GPL
+ * Copyright (c) 2005-2024 Monitoring Plugins Development Team
+ *
+ * Description :
+ *
+ * A simple interface to executing programs from other programs, using an
+ * optimized and safe popen()-like implementation. It is considered safe
+ * in that no shell needs to be spawned and the environment passed to the
+ * execve()'d program is essentially empty.
+ *
+ * The code in this file is a derivative of popen.c which in turn was taken
+ * from "Advanced Programming for the Unix Environment" by W. Richard Stevens.
+ *
+ * Care has been taken to make sure the functions are async-safe. The one
+ * function which isn't is np_runcmd_init() which it doesn't make sense to
+ * call twice anyway, so the api as a whole should be considered async-safe.
+ *
+ *
+ * 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ *****************************************************************************/
 
 #define NAGIOSPLUG_API_C 1
 
 /** includes **/
 #include "runcmd.h"
 #ifdef HAVE_SYS_WAIT_H
-# include <sys/wait.h>
+#       include <sys/wait.h>
 #endif
 
 #include "./utils.h"
 
 /** macros **/
 #ifndef WEXITSTATUS
-# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
+#       define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
 #endif
 
 #ifndef WIFEXITED
-# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
+#       define WIFEXITED(stat_val) (((stat_val)&255) == 0)
 #endif
 
 /* 4.3BSD Reno <signal.h> doesn't define SIG_ERR */
 #if defined(SIG_IGN) && !defined(SIG_ERR)
-# define SIG_ERR ((Sigfunc *)-1)
+#       define SIG_ERR ((Sigfunc *)-1)
 #endif
 
 #include "../lib/maxfd.h"
@@ -72,33 +72,26 @@
 static pid_t *np_pids = NULL;
 
 /** prototypes **/
-static int np_runcmd_open(const char *, int *, int *)
-        __attribute__((__nonnull__(1, 2, 3)));
+static int np_runcmd_open(const char *, int *, int *) __attribute__((__nonnull__(1, 2, 3)));
 
-static int np_fetch_output(int, output *, int)
-        __attribute__((__nonnull__(2)));
+static int np_fetch_output(int, output *, int) __attribute__((__nonnull__(2)));
 
 static int np_runcmd_close(int);
 
 /* prototype imported from utils.h */
-extern void die (int, const char *, ...)
-        __attribute__((__noreturn__,__format__(__printf__, 2, 3)));
-
+extern void die(int, const char *, ...) __attribute__((__noreturn__, __format__(__printf__, 2, 3)));
 
 /* this function is NOT async-safe. It is exported so multithreaded
  * plugins (or other apps) can call it prior to running any commands
  * through this api and thus achieve async-safeness throughout the api */
-void np_runcmd_init(void)
-{
-  long maxfd = mp_open_max();
-        if(!np_pids) np_pids = calloc(maxfd, sizeof(pid_t));
+void np_runcmd_init(void) {
+        long maxfd = mp_open_max();
+        if (!np_pids)
+                np_pids = calloc(maxfd, sizeof(pid_t));
 }
 
-
 /* Start running a command */
-static int
-np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr)
-{
+static int np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr) {
         char *env[2];
         char *cmd = NULL;
         char **argv = NULL;
@@ -112,7 +105,8 @@ np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr)
 
         int i = 0;
 
-        if(!np_pids) NP_RUNCMD_INIT;
+        if (!np_pids)
+                NP_RUNCMD_INIT;
 
         env[0] = strdup("LC_ALL=C");
         env[1] = NULL;
@@ -120,49 +114,50 @@ np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr)
         /* make copy of command string so strtok() doesn't silently modify it */
         /* (the calling program may want to access it later) */
         cmdlen = strlen(cmdstring);
-        if((cmd = malloc(cmdlen + 1)) == NULL) return -1;
+        if ((cmd = malloc(cmdlen + 1)) == NULL)
+                return -1;
         memcpy(cmd, cmdstring, cmdlen);
         cmd[cmdlen] = '\0';
 
         /* This is not a shell, so we don't handle "???" */
-        if (strstr (cmdstring, "\"")) return -1;
+        if (strstr(cmdstring, "\""))
+                return -1;
 
         /* allow single quotes, but only if non-whitesapce doesn't occur on both sides */
-        if (strstr (cmdstring, " ' ") || strstr (cmdstring, "'''"))
+        if (strstr(cmdstring, " ' ") || strstr(cmdstring, "'''"))
                 return -1;
 
         /* each arg must be whitespace-separated, so args can be a maximum
          * of (len / 2) + 1. We add 1 extra to the mix for NULL termination */
         argc = (cmdlen >> 1) + 2;
-        argv = calloc(sizeof(char *), argc);
+        argv = calloc(argc, sizeof(char *));
 
         if (argv == NULL) {
-                printf ("%s\n", _("Could not malloc argv array in popen()"));
+                printf("%s\n", _("Could not malloc argv array in popen()"));
                 return -1;
         }
 
         /* get command arguments (stupidly, but fairly quickly) */
         while (cmd) {
                 str = cmd;
-                str += strspn (str, " \t\r\n"); /* trim any leading whitespace */
+                str += strspn(str, " \t\r\n"); /* trim any leading whitespace */
 
-                if (strstr (str, "'") == str) { /* handle SIMPLE quoted strings */
+                if (strstr(str, "'") == str) { /* handle SIMPLE quoted strings */
                         str++;
-                        if (!strstr (str, "'")) return -1;      /* balanced? */
-                        cmd = 1 + strstr (str, "'");
-                        str[strcspn (str, "'")] = 0;
-                }
-                else {
-                        if (strpbrk (str, " \t\r\n")) {
-                                cmd = 1 + strpbrk (str, " \t\r\n");
-                                str[strcspn (str, " \t\r\n")] = 0;
-                        }
-                        else {
+                        if (!strstr(str, "'"))
+                                return -1; /* balanced? */
+                        cmd = 1 + strstr(str, "'");
+                        str[strcspn(str, "'")] = 0;
+                } else {
+                        if (strpbrk(str, " \t\r\n")) {
+                                cmd = 1 + strpbrk(str, " \t\r\n");
+                                str[strcspn(str, " \t\r\n")] = 0;
+                        } else {
                                 cmd = NULL;
                         }
                 }
 
-                if (cmd && strlen (cmd) == strspn (cmd, " \t\r\n"))
+                if (cmd && strlen(cmd) == strspn(cmd, " \t\r\n"))
                         cmd = NULL;
 
                 argv[i++] = str;
@@ -173,33 +168,33 @@ np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr)
 
         /* child runs exceve() and _exit. */
         if (pid == 0) {
-#ifdef  RLIMIT_CORE
+#ifdef RLIMIT_CORE
                 /* the program we execve shouldn't leave core files */
-                getrlimit (RLIMIT_CORE, &limit);
+                getrlimit(RLIMIT_CORE, &limit);
                 limit.rlim_cur = 0;
-                setrlimit (RLIMIT_CORE, &limit);
+                setrlimit(RLIMIT_CORE, &limit);
 #endif
-                close (pfd[0]);
+                close(pfd[0]);
                 if (pfd[1] != STDOUT_FILENO) {
-                        dup2 (pfd[1], STDOUT_FILENO);
-                        close (pfd[1]);
+                        dup2(pfd[1], STDOUT_FILENO);
+                        close(pfd[1]);
                 }
-                close (pfderr[0]);
+                close(pfderr[0]);
                 if (pfderr[1] != STDERR_FILENO) {
-                        dup2 (pfderr[1], STDERR_FILENO);
-                        close (pfderr[1]);
+                        dup2(pfderr[1], STDERR_FILENO);
+                        close(pfderr[1]);
                 }
 
                 /* close all descriptors in np_pids[]
                  * This is executed in a separate address space (pure child),
                  * so we don't have to worry about async safety */
-    long maxfd = mp_open_max();
+                long maxfd = mp_open_max();
                 for (i = 0; i < maxfd; i++)
-                        if(np_pids[i] > 0)
-                                close (i);
+                        if (np_pids[i] > 0)
+                                close(i);
 
-                execve (argv[0], argv, env);
-                _exit (STATE_UNKNOWN);
+                execve(argv[0], argv, env);
+                _exit(STATE_UNKNOWN);
         }
 
         /* parent picks up execution here */
@@ -213,49 +208,44 @@ np_runcmd_open(const char *cmdstring, int *pfd, int *pfderr)
         return pfd[0];
 }
 
-
-static int
-np_runcmd_close(int fd)
-{
+static int np_runcmd_close(int fd) {
         int status;
         pid_t pid;
 
         /* make sure this fd was opened by popen() */
-  long maxfd = mp_open_max();
-        if(fd < 0 || fd > maxfd || !np_pids || (pid = np_pids[fd]) == 0)
+        long maxfd = mp_open_max();
+        if (fd < 0 || fd > maxfd || !np_pids || (pid = np_pids[fd]) == 0)
                 return -1;
 
         np_pids[fd] = 0;
-        if (close (fd) == -1) return -1;
+        if (close(fd) == -1)
+                return -1;
 
         /* EINTR is ok (sort of), everything else is bad */
-        while (waitpid (pid, &status, 0) < 0)
-                if (errno != EINTR) return -1;
+        while (waitpid(pid, &status, 0) < 0)
+                if (errno != EINTR)
+                        return -1;
 
         /* return child's termination status */
         return (WIFEXITED(status)) ? WEXITSTATUS(status) : -1;
 }
 
-
-void
-runcmd_timeout_alarm_handler (int signo)
-{
+void runcmd_timeout_alarm_handler(int signo) {
 
         if (signo == SIGALRM)
                 puts(_("CRITICAL - Plugin timed out while executing system call"));
 
-  long maxfd = mp_open_max();
-        if(np_pids) for(long int i = 0; i < maxfd; i++) {
-                if(np_pids[i] != 0) kill(np_pids[i], SIGKILL);
-        }
+        long maxfd = mp_open_max();
+        if (np_pids)
+                for (long int i = 0; i < maxfd; i++) {
+                        if (np_pids[i] != 0)
+                                kill(np_pids[i], SIGKILL);
+                }
 
-        exit (STATE_CRITICAL);
+        exit(STATE_CRITICAL);
 }
 
-
-static int
-np_fetch_output(int fd, output *op, int flags)
-{
+static int np_fetch_output(int fd, output *op, int flags) {
         size_t len = 0, i = 0, lineno = 0;
         size_t rsf = 6, ary_size = 0; /* rsf = right shift factor, dec'ed uncond once */
         char *buf = NULL;
@@ -264,7 +254,7 @@ np_fetch_output(int fd, output *op, int flags)
 
         op->buf = NULL;
         op->buflen = 0;
-        while((ret = read(fd, tmpbuf, sizeof(tmpbuf))) > 0) {
+        while ((ret = read(fd, tmpbuf, sizeof(tmpbuf))) > 0) {
                 len = (size_t)ret;
                 op->buf = realloc(op->buf, op->buflen + len + 1);
                 memcpy(op->buf + op->buflen, tmpbuf, len);
@@ -272,33 +262,33 @@ np_fetch_output(int fd, output *op, int flags)
                 i++;
         }
 
-        if(ret < 0) {
+        if (ret < 0) {
                 printf("read() returned %d: %s\n", ret, strerror(errno));
                 return ret;
         }
 
         /* some plugins may want to keep output unbroken, and some commands
          * will yield no output, so return here for those */
-        if(flags & RUNCMD_NO_ARRAYS || !op->buf || !op->buflen)
+        if (flags & RUNCMD_NO_ARRAYS || !op->buf || !op->buflen)
                 return op->buflen;
 
         /* and some may want both */
-        if(flags & RUNCMD_NO_ASSOC) {
+        if (flags & RUNCMD_NO_ASSOC) {
                 buf = malloc(op->buflen);
                 memcpy(buf, op->buf, op->buflen);
-        }
-        else buf = op->buf;
+        } else
+                buf = op->buf;
 
         op->line = NULL;
         op->lens = NULL;
         i = 0;
-        while(i < op->buflen) {
+        while (i < op->buflen) {
                 /* make sure we have enough memory */
-                if(lineno >= ary_size) {
+                if (lineno >= ary_size) {
                         /* ary_size must never be zero */
                         do {
                                 ary_size = op->buflen >> --rsf;
-                        } while(!ary_size);
+                        } while (!ary_size);
 
                         op->line = realloc(op->line, ary_size * sizeof(char *));
                         op->lens = realloc(op->lens, ary_size * sizeof(size_t));
@@ -308,7 +298,8 @@ np_fetch_output(int fd, output *op, int flags)
                 op->line[lineno] = &buf[i];
 
                 /* hop to next newline or end of buffer */
-                while(buf[i] != '\n' && i < op->buflen) i++;
+                while (buf[i] != '\n' && i < op->buflen)
+                        i++;
                 buf[i] = '\0';
 
                 /* calculate the string length using pointer difference */
@@ -321,21 +312,22 @@ np_fetch_output(int fd, output *op, int flags)
         return lineno;
 }
 
-
-int
-np_runcmd(const char *cmd, output *out, output *err, int flags)
-{
+int np_runcmd(const char *cmd, output *out, output *err, int flags) {
         int fd, pfd_out[2], pfd_err[2];
 
         /* initialize the structs */
-        if(out) memset(out, 0, sizeof(output));
-        if(err) memset(err, 0, sizeof(output));
-
-        if((fd = np_runcmd_open(cmd, pfd_out, pfd_err)) == -1)
-                die (STATE_UNKNOWN, _("Could not open pipe: %s\n"), cmd);
-
-        if(out) out->lines = np_fetch_output(pfd_out[0], out, flags);
-        if(err) err->lines = np_fetch_output(pfd_err[0], err, flags);
+        if (out)
+                memset(out, 0, sizeof(output));
+        if (err)
+                memset(err, 0, sizeof(output));
+
+        if ((fd = np_runcmd_open(cmd, pfd_out, pfd_err)) == -1)
+                die(STATE_UNKNOWN, _("Could not open pipe: %s\n"), cmd);
+
+        if (out)
+                out->lines = np_fetch_output(pfd_out[0], out, flags);
+        if (err)
+                err->lines = np_fetch_output(pfd_err[0], err, flags);
 
         return np_runcmd_close(fd);
 }