check_apt: Add -l/--list option to print packages

1 files changed, 65 insertions, 7 deletions

diff --git a/plugins/check_apt.c b/plugins/check_apt.c
index c90b3df7..b69680c2 100644
--- a/plugins/check_apt.c
+++ b/plugins/check_apt.c
@@ -66,12 +66,17 @@ char* construct_cmdline(upgrade_type u, const char *opts);
 /* run an apt-get update */
 int run_update(void);
 /* run an apt-get upgrade */
-int run_upgrade(int *pkgcount, int *secpkgcount);
+int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkglist);
 /* add another clause to a regexp */
 char* add_to_regexp(char *expr, const char *next);
+/* extract package name from Inst line */
+char* pkg_name(char *line);
+/* string comparison function for qsort */
+int cmpstringp(const void *p1, const void *p2);
 
 /* configuration variables */
 static int verbose = 0;      /* -v */
+static int list = 0;         /* list packages available for upgrade */
 static int do_update = 0;    /* whether to call apt-get update */
 static int only_critical = 0;    /* whether to warn about non-critical updates */
 static upgrade_type upgrade = UPGRADE; /* which type of upgrade to do */
@@ -87,7 +92,8 @@ 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, packages_available=0, sec_count=0;
+        int result=STATE_UNKNOWN, packages_available=0, sec_count=0, i=0;
+        char **packages_list=NULL, **secpackages_list=NULL;
 
         /* Parse extra opts if any */
         argv=np_extra_opts(&argc, argv, progname);
@@ -107,7 +113,7 @@ int main (int argc, char **argv) {
         if(do_update) result = run_update();
 
         /* apt-get upgrade */
-        result = max_state(result, run_upgrade(&packages_available, &sec_count));
+        result = max_state(result, run_upgrade(&packages_available, &sec_count, &packages_list, &secpackages_list));
 
         if(sec_count > 0){
                 result = max_state(result, STATE_CRITICAL);
@@ -130,6 +136,18 @@ int main (int argc, char **argv) {
                    sec_count
                );
 
+        if(list) {
+                qsort(secpackages_list, sec_count, sizeof(char*), cmpstringp);
+                qsort(packages_list, packages_available-sec_count, sizeof(char*), cmpstringp);
+
+                for(i = 0; i < sec_count; i++)
+                        printf("%s (security)\n", secpackages_list[i]);
+                if (only_critical == 0) {
+                        for(i = 0; i < packages_available - sec_count; i++)
+                                printf("%s\n", packages_list[i]);
+                }
+        }
+
         return result;
 }
 
@@ -146,6 +164,7 @@ int process_arguments (int argc, char **argv) {
                 {"upgrade", optional_argument, 0, 'U'},
                 {"no-upgrade", no_argument, 0, 'n'},
                 {"dist-upgrade", optional_argument, 0, 'd'},
+                {"list", no_argument, 0, 'l'},
                 {"include", required_argument, 0, 'i'},
                 {"exclude", required_argument, 0, 'e'},
                 {"critical", required_argument, 0, 'c'},
@@ -155,7 +174,7 @@ int process_arguments (int argc, char **argv) {
         };
 
         while(1) {
-                c = getopt_long(argc, argv, "hVvt:u::U::d::ni:e:c:o", longopts, NULL);
+                c = getopt_long(argc, argv, "hVvt:u::U::d::nli:e:c:o", longopts, NULL);
 
                 if(c == -1 || c == EOF || c == 1) break;
 
@@ -196,6 +215,9 @@ int process_arguments (int argc, char **argv) {
                                 if(update_opts==NULL) die(STATE_UNKNOWN, "strdup failed");
                         }
                         break;
+                case 'l':
+                        list=1;
+                        break;
                 case 'i':
                         do_include=add_to_regexp(do_include, optarg);
                         break;
@@ -222,7 +244,7 @@ int process_arguments (int argc, char **argv) {
 
 
 /* run an apt-get upgrade */
-int run_upgrade(int *pkgcount, int *secpkgcount){
+int run_upgrade(int *pkgcount, int *secpkgcount, char ***pkglist, char ***secpkglist){
         int i=0, result=STATE_UNKNOWN, regres=0, pc=0, spc=0;
         struct output chld_out, chld_err;
         regex_t ireg, ereg, sreg;
@@ -278,6 +300,11 @@ int run_upgrade(int *pkgcount, int *secpkgcount){
                     cmdline);
         }
 
+        *pkglist=malloc(sizeof(char *) * chld_out.lines);
+        if(!pkglist) die(STATE_UNKNOWN, "malloc failed!\n");
+        *secpkglist=malloc(sizeof(char *) * chld_out.lines);
+        if(!secpkglist) die(STATE_UNKNOWN, "malloc failed!\n");
+
         /* parse the output, which should only consist of lines like
          *
          * Inst package ....
@@ -302,6 +329,9 @@ int run_upgrade(int *pkgcount, int *secpkgcount){
                                 if(regexec(&sreg, chld_out.line[i], 0, NULL, 0)==0){
                                         spc++;
                                         if(verbose) printf("*");
+                                        (*secpkglist)[spc-1] = pkg_name(chld_out.line[i]);
+                                } else {
+                                        (*pkglist)[pc-spc-1] = pkg_name(chld_out.line[i]);
                                 }
                                 if(verbose){
                                         printf("*%s\n", chld_out.line[i]);
@@ -368,6 +398,31 @@ int run_update(void){
         return result;
 }
 
+char* pkg_name(char *line){
+        char *start=NULL, *space=NULL, *pkg=NULL;
+        int len=0;
+
+        start = line + strlen(PKGINST_PREFIX);
+        len = strlen(start);
+
+        space = index(start, ' ');
+        if(space!=NULL){
+                len = space - start;
+        }
+
+        pkg=malloc(sizeof(char)*(len+1));
+        if(!pkg) die(STATE_UNKNOWN, "malloc failed!\n");
+
+        strncpy(pkg, start, len);
+        pkg[len]='\0';
+
+        return pkg;
+}
+
+int cmpstringp(const void *p1, const void *p2){
+        return strcmp(* (char * const *) p1, * (char * const *) p2);
+}
+
 char* add_to_regexp(char *expr, const char *next){
         char *re=NULL;
 
@@ -450,8 +505,11 @@ print_help (void)
   printf (" %s\n", "-d, --dist-upgrade=OPTS");
   printf ("    %s\n", _("Perform a dist-upgrade instead of normal upgrade. Like with -U OPTS"));
   printf ("    %s\n", _("can be provided to override the default options."));
-  printf (" %s\n", " -n, --no-upgrade");
+  printf (" %s\n", "-n, --no-upgrade");
   printf ("    %s\n", _("Do not run the upgrade.  Probably not useful (without -u at least)."));
+  printf (" %s\n", "-l, --list");
+  printf ("    %s\n", _("List packages available for upgrade.  Packages are printed sorted by"));
+  printf ("    %s\n", _("name with security packages listed first."));
   printf (" %s\n", "-i, --include=REGEXP");
   printf ("    %s\n", _("Include only packages matching REGEXP.  Can be specified multiple times"));
   printf ("    %s\n", _("the values will be combined together.  Any packages matching this list"));
@@ -490,5 +548,5 @@ void
 print_usage(void)
 {
   printf ("%s\n", _("Usage:"));
-  printf ("%s [[-d|-u|-U]opts] [-n] [-t timeout]\n", progname);
+  printf ("%s [[-d|-u|-U]opts] [-n] [-l] [-t timeout]\n", progname);
 }