check_apt: localize variables

1 files changed, 28 insertions, 37 deletions

diff --git a/plugins/check_apt.c b/plugins/check_apt.c
index eb08a06..c2c693e 100644
--- a/plugins/check_apt.c
+++ b/plugins/check_apt.c
@@ -94,12 +94,6 @@ static int stderr_warning = 0; /* if a cmd issued output on stderr */
 static int exec_warning = 0;   /* if a cmd exited non-zero */
 
 int main(int argc, char **argv) {
-        int result = STATE_UNKNOWN;
-        int packages_available = 0;
-        int sec_count = 0;
-        char **packages_list = NULL;
-        char **secpackages_list = NULL;
-
         /* Parse extra opts if any */
         argv = np_extra_opts(&argc, argv, progname);
 
@@ -115,11 +109,16 @@ int main(int argc, char **argv) {
         /* handle timeouts gracefully... */
         alarm(timeout_interval);
 
+        int result = STATE_UNKNOWN;
         /* if they want to run apt-get update first... */
         if (do_update) {
                 result = run_update();
         }
 
+        int packages_available = 0;
+        int sec_count = 0;
+        char **packages_list = NULL;
+        char **secpackages_list = NULL;
         /* apt-get upgrade */
         result = max_state(result, run_upgrade(&packages_available, &sec_count, &packages_list, &secpackages_list));
 
@@ -156,8 +155,6 @@ int main(int argc, char **argv) {
 
 /* process command-line arguments */
 int process_arguments(int argc, char **argv) {
-        int c;
-
         static struct option longopts[] = {{"version", no_argument, 0, 'V'},
                                                                            {"help", no_argument, 0, 'h'},
                                                                            {"verbose", no_argument, 0, 'v'},
@@ -175,14 +172,14 @@ int process_arguments(int argc, char **argv) {
                                                                            {"packages-warning", required_argument, 0, 'w'},
                                                                            {0, 0, 0, 0}};
 
-        while (1) {
-                c = getopt_long(argc, argv, "hVvt:u::U::d::nli:e:c:ow:", longopts, NULL);
+        while (true) {
+                int option_char = getopt_long(argc, argv, "hVvt:u::U::d::nli:e:c:ow:", longopts, NULL);
 
-                if (c == -1 || c == EOF || c == 1) {
+                if (option_char == -1 || option_char == EOF || option_char == 1) {
                         break;
                 }
 
-                switch (c) {
+                switch (option_char) {
                 case 'h':
                         print_help();
                         exit(STATE_UNKNOWN);
@@ -257,18 +254,7 @@ int process_arguments(int argc, char **argv) {
 
 /* run an apt-get upgrade */
 int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkglist) {
-        int result = STATE_UNKNOWN;
-        int regres = 0;
-        int pc = 0;
-        int spc = 0;
-        struct output chld_out;
-        struct output chld_err;
-        regex_t ireg;
         regex_t ereg;
-        regex_t sreg;
-        char *cmdline = NULL;
-        char rerrbuf[64];
-
         /* initialize ereg as it is possible it is printed while uninitialized */
         memset(&ereg, '\0', sizeof(ereg.buffer));
 
@@ -276,6 +262,9 @@ int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkg
                 return STATE_OK;
         }
 
+        int regres = 0;
+        regex_t ireg;
+        char rerrbuf[64];
         /* compile the regexps */
         if (do_include != NULL) {
                 regres = regcomp(&ireg, do_include, REG_EXTENDED);
@@ -293,6 +282,7 @@ int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkg
                 }
         }
 
+        regex_t sreg;
         const char *crit_ptr = (do_critical != NULL) ? do_critical : SECURITY_RE;
         regres = regcomp(&sreg, crit_ptr, REG_EXTENDED);
         if (regres != 0) {
@@ -300,6 +290,10 @@ int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkg
                 die(STATE_UNKNOWN, _("%s: Error compiling regexp: %s"), progname, rerrbuf);
         }
 
+        int result = STATE_UNKNOWN;
+        struct output chld_out;
+        struct output chld_err;
+        char *cmdline = NULL;
         cmdline = construct_cmdline(upgrade, upgrade_opts);
         if (input_filename != NULL) {
                 /* read input from a file for testing */
@@ -336,6 +330,8 @@ int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkg
          * we may need to switch to the --print-uris output format,
          * in which case the logic here will slightly change.
          */
+        int pc = 0;
+        int spc = 0;
         for (size_t i = 0; i < chld_out.lines; i++) {
                 if (verbose) {
                         printf("%s\n", chld_out.line[i]);
@@ -389,12 +385,12 @@ int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkg
 /* run an apt-get update (needs root) */
 int run_update(void) {
         int result = STATE_UNKNOWN;
-        struct output chld_out;
-        struct output chld_err;
         char *cmdline;
-
         /* run the update */
         cmdline = construct_cmdline(NO_UPGRADE, update_opts);
+
+        struct output chld_out;
+        struct output chld_err;
         result = np_runcmd(cmdline, &chld_out, &chld_err, 0);
         /* apt-get update changes exit status if it can't fetch packages.
          * since we were explicitly asked to do so, this is treated as
@@ -426,20 +422,16 @@ int run_update(void) {
 }
 
 char *pkg_name(char *line) {
-        char *start = NULL;
-        char *space = NULL;
-        char *pkg = NULL;
-        int len = 0;
+        char *start = line + strlen(PKGINST_PREFIX);
 
-        start = line + strlen(PKGINST_PREFIX);
-        len = strlen(start);
+        int len = strlen(start);
 
-        space = index(start, ' ');
+        char *space = index(start, ' ');
         if (space != NULL) {
                 len = space - start;
         }
 
-        pkg = malloc(sizeof(char) * (len + 1));
+        char *pkg = malloc(sizeof(char) * (len + 1));
         if (!pkg) {
                 die(STATE_UNKNOWN, "malloc failed!\n");
         }
@@ -475,10 +467,8 @@ char *add_to_regexp(char *expr, const char *next) {
 }
 
 char *construct_cmdline(upgrade_type u, const char *opts) {
-        int len = 0;
         const char *opts_ptr = NULL;
         const char *aptcmd = NULL;
-        char *cmd = NULL;
 
         switch (u) {
         case UPGRADE:
@@ -507,11 +497,12 @@ char *construct_cmdline(upgrade_type u, const char *opts) {
                 break;
         }
 
+        int len = 0;
         len += strlen(PATH_TO_APTGET) + 1; /* "/usr/bin/apt-get " */
         len += strlen(opts_ptr) + 1;       /* "opts " */
         len += strlen(aptcmd) + 1;         /* "upgrade\0" */
 
-        cmd = (char *)malloc(sizeof(char) * len);
+        char *cmd = (char *)malloc(sizeof(char) * len);
         if (cmd == NULL) {
                 die(STATE_UNKNOWN, "malloc failed");
         }