Implemented writes to state file

2 files changed, 137 insertions, 14 deletions

diff --git a/lib/tests/test_utils.c b/lib/tests/test_utils.c
index d7cdc33..6e04bfc 100644
--- a/lib/tests/test_utils.c
+++ b/lib/tests/test_utils.c
@@ -21,6 +21,9 @@
 
 #include "tap.h"
 
+#include <sys/types.h>
+#include <sys/stat.h>
+
 int
 main (int argc, char **argv)
 {
@@ -36,7 +39,7 @@ main (int argc, char **argv)
         nagios_plugin *temp_nagios_plugin;
         FILE    *temp_fp;
 
-        plan_tests(81+23);
+        plan_tests(134);
 
         _get_nagios_plugin( &temp_nagios_plugin );
         ok( temp_nagios_plugin==NULL, "nagios_plugin not initialised");
@@ -295,13 +298,11 @@ main (int argc, char **argv)
         ok( !strcmp(temp_state_key->name, "Ahash"), "Got key name" );
 
 
-        printf("Filename=%s\n", temp_state_key->_filename);
         np_enable_state("funnykeyname", 54);
         temp_state_key = temp_nagios_plugin->state;
         ok( !strcmp(temp_state_key->plugin_name, "check_test"), "Got plugin name" );
         ok( !strcmp(temp_state_key->name, "funnykeyname"), "Got key name" );
 
-        printf("Filename=%s\n", temp_state_key->_filename);
 
 
         ok( !strcmp(temp_state_key->_filename, "/usr/local/nagios/var/check_test/funnykeyname"), "Got internal filename" );
@@ -325,20 +326,71 @@ main (int argc, char **argv)
         ok( temp_nagios_plugin->state->state_data!=NULL, "Got state data now" );
         ok( temp_nagios_plugin->state->state_data->time==1234567890, "Got time" );
         ok( !strcmp((char *)temp_nagios_plugin->state->state_data->data, "String to read"), "Data as expected" );
-        printf("state_data=%s|\n", temp_nagios_plugin->state->state_data->data);
 
+        temp_state_key->data_version=53;
+        temp_state_data = np_state_read(temp_state_key);
+        ok( temp_state_data==NULL, "Older data version gives NULL" );
+        temp_state_key->data_version=54;
 
         temp_state_key->_filename="var/nonexistant";
         temp_state_data = np_state_read(temp_state_key);
         ok( temp_state_data==NULL, "Missing file gives NULL" );
         ok( temp_nagios_plugin->state->state_data==NULL, "No state information" );
 
-        time(&current_time);
-        np_state_write_string(NULL, "New data");
+        temp_state_key->_filename="var/oldformat";
+        temp_state_data = np_state_read(temp_state_key);
+        ok( temp_state_data==NULL, "Old file format gives NULL" );
+
+        temp_state_key->_filename="var/baddate";
+        temp_state_data = np_state_read(temp_state_key);
+        ok( temp_state_data==NULL, "Bad date gives NULL" );
 
+        temp_state_key->_filename="var/missingdataline";
+        temp_state_data = np_state_read(temp_state_key);
+        ok( temp_state_data==NULL, "Missing data line gives NULL" );
+
+
+
+
+        unlink("var/generated");
+        temp_state_key->_filename="var/generated";
+        current_time=1234567890;
+        np_state_write_string(&current_time, "String to read");
+        ok(system("cmp var/generated var/statefile")==0, "Generated file same as expected");
+
+
+
+
+        unlink("var/generated_directory/statefile");
+        unlink("var/generated_directory");
+        temp_state_key->_filename="var/generated_directory/statefile";
+        current_time=1234567890;
+        np_state_write_string(&current_time, "String to read");
+        ok(system("cmp var/generated_directory/statefile var/statefile")==0, "Have created directory");
+
+        /* This test to check cannot write to dir - can't automate yet */
+        /*
+        unlink("var/generated_bad_dir");
+        mkdir("var/generated_bad_dir", S_IRUSR);
+        np_state_write_string(&current_time, "String to read");
+        */
+
+
+        temp_state_key->_filename="var/generated";
+        time(&current_time);
+        np_state_write_string(NULL, "String to read");
         temp_state_data = np_state_read(temp_state_key);
         /* Check time is set to current_time */
+        ok(system("cmp var/generated var/statefile > /dev/null")!=0, "Generated file should be different this time");
+        ok(temp_nagios_plugin->state->state_data->time-current_time<=1, "Has time generated from current time");
+        
 
+        /* Don't know how to automatically test this. Need to be able to redefine die and catch the error */
+        /*
+        temp_state_key->_filename="/dev/do/not/expect/to/be/able/to/write";
+        np_state_write_string(NULL, "Bad file");
+        */
+        
 
         np_cleanup();
         ok(temp_state_key==NULL, "temp_state_key cleared");
diff --git a/lib/utils_base.c b/lib/utils_base.c
index 8550577..5eaf57b 100644
--- a/lib/utils_base.c
+++ b/lib/utils_base.c
@@ -357,7 +357,6 @@ char *_np_state_generate_key() {
 void _cleanup_state_data() {
         if (this_nagios_plugin->state->state_data!=NULL) {
                 np_free(this_nagios_plugin->state->state_data->data);
-                printf("***Setting\n");
                 np_free(this_nagios_plugin->state->state_data);
         }
 }
@@ -399,6 +398,7 @@ void np_enable_state(char *keyname, int expected_data_version) {
         this_state->name=keyname;
         this_state->plugin_name=this_nagios_plugin->plugin_name;
         this_state->data_version=expected_data_version;
+        this_state->state_data=NULL;
 
         /* Calculate filename */
         asprintf(&temp_filename, "%s/%s/%s", _np_state_calculate_location_prefix(), this_nagios_plugin->plugin_name, keyname);
@@ -433,6 +433,7 @@ state_data *np_state_read() {
                 if(this_state_data==NULL)
                         die(STATE_UNKNOWN, _("Cannot allocate memory for state data"));
 
+                this_state_data->data=NULL;
                 this_nagios_plugin->state->state_data = this_state_data;
 
                 rc = _np_state_read_file(statefile);
@@ -441,7 +442,6 @@ state_data *np_state_read() {
         }
 
         if(rc==FALSE) {
-                printf("Called\n");
                 _cleanup_state_data();
         }
 
@@ -465,21 +465,17 @@ int _np_state_read_file(FILE *f) {
         /* Note: This introduces a limit of 1024 bytes in the string data */
         line = (char *) malloc(1024);
 
-        printf("Here\n");
         while(!failure && (fgets(line,1024,f))!=NULL){
                 pos=strlen(line);
                 if(line[pos-1]=='\n') {
                         line[pos-1]='\0';
                 }
-                printf("Reading line |%s|\n", line);
 
                 if(line[0] == '#') continue;
 
                 switch(expected) {
                         case STATE_FILE_VERSION:
                                 i=atoi(line);
-                                //printf("line=|%d|, exp=|%d|\n", i, NP_STATE_FORMAT_VERSION);
-                                //if(!strcmp(NP_STATE_FORMAT_VERSION, line)) {
                                 if(i!=NP_STATE_FORMAT_VERSION)
                                         failure++;
                                 else
@@ -487,7 +483,6 @@ int _np_state_read_file(FILE *f) {
                                 break;
                         case STATE_DATA_VERSION:
                                 i=atoi(line);
-                                printf("i=%d, exp=%d\n", i, this_nagios_plugin->state->data_version);
                                 if(i != this_nagios_plugin->state->data_version)
                                         failure++;
                                 else
@@ -514,7 +509,6 @@ int _np_state_read_file(FILE *f) {
         }
 
         np_free(line);
-        printf("Returning status=%d\n", status);
         return status;
 }
 
@@ -526,5 +520,82 @@ int _np_state_read_file(FILE *f) {
  * Will die with UNKNOWN if errors
  */
 void np_state_write_string(time_t *data_time, char *data_string) {
+        FILE *fp;
+        char *temp_file=NULL;
+        int fd=0, result=0;
+        time_t current_time;
+        size_t len;
+        char *directories=NULL;
+        char *p=NULL;
+
+        if(data_time==NULL)
+                time(&current_time);
+        else
+                current_time=*data_time;
+        
+        /* If file doesn't currently exist, create directories */
+        if(access(this_nagios_plugin->state->_filename,F_OK)!=0) {
+                asprintf(&directories, "%s", this_nagios_plugin->state->_filename);
+                if(directories==NULL)
+                        die(STATE_UNKNOWN, _("Cannot malloc"));
+
+                for(p=directories+1; *p; p++) {
+                        if(*p=='/') {
+                                *p='\0';
+                                if((access(directories,F_OK)!=0) && (mkdir(directories, S_IRWXU)!=0)) {
+                                        /* Can't free this! Otherwise error message is wrong! */
+                                        /* np_free(directories); */ 
+                                        die(STATE_UNKNOWN, _("Cannot create directory: %s"), directories);
+                                }
+                                *p='/';
+                        }
+                }
+                np_free(directories);
+        }
+
+        asprintf(&temp_file,"%s.XXXXXX",this_nagios_plugin->state->_filename);
+        if(temp_file==NULL)
+                die(STATE_UNKNOWN, _("Cannot malloc temporary state file"));
+
+        if((fd=mkstemp(temp_file))==-1) {
+                np_free(temp_file);
+                die(STATE_UNKNOWN, _("Cannot create temporary filename"));
+        }
+
+        fp=(FILE *)fdopen(fd,"w");
+        if(fp==NULL) {
+                close(fd);
+                unlink(temp_file);
+                np_free(temp_file);
+                die(STATE_UNKNOWN, _("Unable to open temporary state file"));
+        }
+        
+        fprintf(fp,"# NP State file\n");
+        fprintf(fp,"%d\n",NP_STATE_FORMAT_VERSION);
+        fprintf(fp,"%d\n",this_nagios_plugin->state->data_version);
+        fprintf(fp,"%lu\n",current_time);
+        fprintf(fp,"%s\n",data_string);
+        
+        fchmod(fd, S_IRUSR | S_IWUSR | S_IRGRP);
+        
+        fflush(fp);
+
+        result=fclose(fp);
+
+        fsync(fd);
+
+        if(result!=0) {
+                unlink(temp_file);
+                np_free(temp_file);
+                die(STATE_UNKNOWN, _("Error writing temp file"));
+        }
+
+        if(rename(temp_file, this_nagios_plugin->state->_filename)!=0) {
+                unlink(temp_file);
+                np_free(temp_file);
+                die(STATE_UNKNOWN, _("Cannot rename state temp file"));
+        }
+
+        np_free(temp_file);
 }