1 files changed, 45 insertions, 23 deletions

diff --git a/plugins/popen.c b/plugins/popen.c
index cfe930b6..c596d1e0 100644
--- a/plugins/popen.c
+++ b/plugins/popen.c
@@ -68,7 +68,7 @@ void popen_timeout_alarm_handler(int /*signo*/);
 #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 */
@@ -96,24 +96,28 @@ FILE *spopen(const char *cmdstring) {
         env[1] = NULL;
 
         /* if no command was passed, return with no error */
-        if (cmdstring == NULL)
+        if (cmdstring == NULL) {
                 return (NULL);
+        }
 
         char *cmd = NULL;
         /* make copy of command string so strtok() doesn't silently modify it */
         /* (the calling program may want to access it later) */
         cmd = malloc(strlen(cmdstring) + 1);
-        if (cmd == NULL)
+        if (cmd == NULL) {
                 return NULL;
+        }
         strcpy(cmd, cmdstring);
 
         /* This is not a shell, so we don't handle "???" */
-        if (strstr(cmdstring, "\""))
+        if (strstr(cmdstring, "\"")) {
                 return NULL;
+        }
 
         /* 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 NULL;
+        }
 
         int argc;
         char **argv = NULL;
@@ -140,15 +144,17 @@ FILE *spopen(const char *cmdstring) {
 
                 if (strstr(str, "'") == str) { /* handle SIMPLE quoted strings */
                         str++;
-                        if (!strstr(str, "'"))
+                        if (!strstr(str, "'")) {
                                 return NULL; /* balanced? */
+                        }
                         cmd = 1 + strstr(str, "'");
                         str[strcspn(str, "'")] = 0;
                 } else if (strcspn(str, "'") < strcspn(str, " \t\r\n")) {
                         /* handle --option='foo bar' strings */
                         char *tmp = str + strcspn(str, "'") + 1;
-                        if (!strstr(tmp, "'"))
+                        if (!strstr(tmp, "'")) {
                                 return NULL; /* balanced? */
+                        }
                         tmp += strcspn(tmp, "'") + 1;
                         *tmp = 0;
                         cmd = tmp + 1;
@@ -161,8 +167,9 @@ FILE *spopen(const char *cmdstring) {
                         }
                 }
 
-                if (cmd && strlen(cmd) == strspn(cmd, " \t\r\n"))
+                if (cmd && strlen(cmd) == strspn(cmd, " \t\r\n")) {
                         cmd = NULL;
+                }
 
                 argv[i++] = str;
         }
@@ -171,22 +178,26 @@ FILE *spopen(const char *cmdstring) {
         long maxfd = mp_open_max();
 
         if (childpid == NULL) { /* first time through */
-                if ((childpid = calloc((size_t)maxfd, sizeof(pid_t))) == NULL)
+                if ((childpid = calloc((size_t)maxfd, sizeof(pid_t))) == NULL) {
                         return (NULL);
+                }
         }
 
         if (child_stderr_array == NULL) { /* first time through */
-                if ((child_stderr_array = calloc((size_t)maxfd, sizeof(int))) == NULL)
+                if ((child_stderr_array = calloc((size_t)maxfd, sizeof(int))) == NULL) {
                         return (NULL);
+                }
         }
 
         int pfd[2];
-        if (pipe(pfd) < 0)
+        if (pipe(pfd) < 0) {
                 return (NULL); /* errno set by pipe() */
+        }
 
         int pfderr[2];
-        if (pipe(pfderr) < 0)
+        if (pipe(pfderr) < 0) {
                 return (NULL); /* errno set by pipe() */
+        }
 
 #ifdef REDHAT_SPOPEN_ERROR
         if (signal(SIGCHLD, popen_sigchld_handler) == SIG_ERR) {
@@ -195,8 +206,9 @@ FILE *spopen(const char *cmdstring) {
 #endif
 
         pid_t pid;
-        if ((pid = fork()) < 0)
+        if ((pid = fork()) < 0) {
                 return (NULL); /* errno set by fork() */
+        }
 
         if (pid == 0) { /* child */
                 close(pfd[0]);
@@ -210,17 +222,20 @@ FILE *spopen(const char *cmdstring) {
                         close(pfderr[1]);
                 }
                 /* close all descriptors in childpid[] */
-                for (i = 0; i < maxfd; i++)
-                        if (childpid[i] > 0)
+                for (i = 0; i < maxfd; i++) {
+                        if (childpid[i] > 0) {
                                 close(i);
+                        }
+                }
 
                 execve(argv[0], argv, env);
                 _exit(0);
         }
 
         close(pfd[1]); /* parent */
-        if ((child_process = fdopen(pfd[0], "r")) == NULL)
+        if ((child_process = fdopen(pfd[0], "r")) == NULL) {
                 return (NULL);
+        }
         close(pfderr[1]);
 
         childpid[fileno(child_process)] = pid;                 /* remember child pid for this fd */
@@ -229,17 +244,20 @@ FILE *spopen(const char *cmdstring) {
 }
 
 int spclose(FILE *fp) {
-        if (childpid == NULL)
+        if (childpid == NULL) {
                 return (1); /* popen() has never been called */
+        }
 
         pid_t pid;
         int fd = fileno(fp);
-        if ((pid = childpid[fd]) == 0)
+        if ((pid = childpid[fd]) == 0) {
                 return (1); /* fp wasn't opened by popen() */
+        }
 
         childpid[fd] = 0;
-        if (fclose(fp) == EOF)
+        if (fclose(fp) == EOF) {
                 return (1);
+        }
 
 #ifdef REDHAT_SPOPEN_ERROR
         while (!childtermd)
@@ -247,20 +265,24 @@ int spclose(FILE *fp) {
 #endif
 
         int status;
-        while (waitpid(pid, &status, 0) < 0)
-                if (errno != EINTR)
+        while (waitpid(pid, &status, 0) < 0) {
+                if (errno != EINTR) {
                         return (1); /* error other than EINTR from waitpid() */
+                }
+        }
 
-        if (WIFEXITED(status))
+        if (WIFEXITED(status)) {
                 return (WEXITSTATUS(status)); /* return child's termination status */
+        }
 
         return (1);
 }
 
 #ifdef REDHAT_SPOPEN_ERROR
 void popen_sigchld_handler(int signo) {
-        if (signo == SIGCHLD)
+        if (signo == SIGCHLD) {
                 childtermd = 1;
+        }
 }
 #endif