/* process all config files in a specific config directory (with directory recursion) */
int read_config_dir(char *dirname){
char config_file[MAX_FILENAME_LENGTH];
DIR *dirp;
struct dirent *dirfile;
struct stat buf;
int result=OK;
int x;
/* open the directory for reading */
dirp=opendir(dirname);
if(dirp==NULL){
syslog(LOG_ERR,"Could not open config directory '%s' for reading.\n",dirname);
return ERROR;
}
/* process all files in the directory... */
while((dirfile=readdir(dirp))!=NULL){
/* create the full path to the config file or subdirectory */
snprintf(config_file,sizeof(config_file)-1,"%s/%s",dirname,dirfile->d_name);
config_file[sizeof(config_file)-1]='\x0';
stat(config_file, &buf);
/* process this if it's a config file... */
x=strlen(dirfile->d_name);
if(x>4 && !strcmp(dirfile->d_name+(x-4),".cfg")){
/* only process normal files */
if(!S_ISREG(buf.st_mode))
continue;
/* process the config file */
result=read_config_file(config_file);
/* break out if we encountered an error */
if(result==ERROR)
break;
}
/* recurse into subdirectories... */
if(S_ISDIR(buf.st_mode)){
/* ignore current, parent and hidden directory entries */
if(dirfile->d_name[0]=='.')
continue;
/* process the config directory */
result=read_config_dir(config_file);
/* break out if we encountered an error */
if(result==ERROR)
break;
}
}
closedir(dirp);
return result;
}
/* read in the configuration file */
int read_config_file(char *filename){
FILE *fp;
char config_file[MAX_FILENAME_LENGTH];
char input_buffer[MAX_INPUT_BUFFER];
char *input_line;
char *temp_buffer;
char *varname;
char *varvalue;
int line=0;
int len=0;
int x=0;
/* open the config file for reading */
fp=fopen(filename,"r");
/* exit if we couldn't open the config file */
if(fp==NULL){
syslog(LOG_ERR,"Unable to open config file '%s' for reading\n",filename);
return ERROR;
}
while(fgets(input_buffer,MAX_INPUT_BUFFER-1,fp)){
line++;
input_line=input_buffer;
/* skip leading whitespace */
while(isspace(*input_line))
++input_line;
/* trim trailing whitespace */
len=strlen(input_line);
for(x=len-1;x>=0;x--){
if(isspace(input_line[x]))
input_line[x]='\x0';
else
break;
}
/* skip comments and blank lines */
if(input_line[0]=='#')
continue;
if(input_line[0]=='\x0')
continue;
if(input_line[0]=='\n')
continue;
/* get the variable name */
varname=strtok(input_line,"=");
if(varname==NULL){
syslog(LOG_ERR,"No variable name specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
/* get the variable value */
varvalue=strtok(NULL,"\n");
if(varvalue==NULL){
syslog(LOG_ERR,"No variable value specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
/* allow users to specify directories to recurse into for config files */
else if(!strcmp(varname,"include_dir")){
strncpy(config_file,varvalue,sizeof(config_file)-1);
config_file[sizeof(config_file)-1]='\x0';
/* strip trailing / if necessary */
if(config_file[strlen(config_file)-1]=='/')
config_file[strlen(config_file)-1]='\x0';
/* process the config directory... */
if(read_config_dir(config_file)==ERROR)
syslog(LOG_ERR,"Continuing with errors...");
}
/* allow users to specify individual config files to include */
else if(!strcmp(varname,"include") || !strcmp(varname,"include_file")){
/* process the config file... */
if(read_config_file(varvalue)==ERROR)
syslog(LOG_ERR,"Continuing with errors...");
}
else if(!strcmp(varname,"server_port"))
server_port=strdup(varvalue);
else if(!strcmp(varname,"command_prefix"))
command_prefix=strdup(varvalue);
else if(!strcmp(varname,"server_address")){
server_address=strdup(varvalue);
}
else if(!strcmp(varname,"allowed_hosts"))
allowed_hosts=strdup(varvalue);
else if(strstr(input_line,"command[")){
temp_buffer=strtok(varname,"[");
temp_buffer=strtok(NULL,"]");
if(temp_buffer==NULL){
syslog(LOG_ERR,"Invalid command specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
add_command(temp_buffer,varvalue);
}
else if(strstr(input_buffer,"debug")){
debug=atoi(varvalue);
if(debug>0)
debug=TRUE;
else
debug=FALSE;
}
else if(!strcmp(varname,"nrpe_user"))
nrpe_user=strdup(varvalue);
else if(!strcmp(varname,"nrpe_group"))
nrpe_group=strdup(varvalue);
else if(!strcmp(varname,"dont_blame_nrpe"))
allow_arguments=(atoi(varvalue)==1)?TRUE:FALSE;
else if(!strcmp(varname,"command_timeout")){
command_timeout=atoi(varvalue);
if(command_timeout<1){
syslog(LOG_ERR,"Invalid command_timeout specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
}
else if(!strcmp(varname,"connection_timeout")){
connection_timeout=atoi(varvalue);
if(connection_timeout<1){
syslog(LOG_ERR,"Invalid connection_timeout specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
}
else if(!strcmp(varname,"allow_weak_random_seed"))
allow_weak_random_seed=(atoi(varvalue)==1)?TRUE:FALSE;
else if(!strcmp(varname,"pid_file"))
pid_file=strdup(varvalue);
else if(!strcmp(varname,"log_facility")){
if((get_log_facility(varvalue))==OK){
/* re-open log using new facility */
closelog();
openlog("nrpe",LOG_PID,log_facility);
}
else
syslog(LOG_WARNING,"Invalid log_facility specified in config file '%s' - Line %d\n",filename,line);
}
else{
syslog(LOG_WARNING,"Unknown option specified in config file '%s' - Line %d\n",filename,line);
continue;
}
}
/* close the config file */
fclose(fp);
return OK;
}
/* read in the configuration file */
int read_config_file(char *filename){
FILE *fp;
char config_file[MAX_FILENAME_LENGTH];
char input_buffer[MAX_INPUT_BUFFER];
char *temp_buffer;
char *varname;
char *varvalue;
int line;
/* open the config file for reading */
fp=fopen(filename,"r");
/* exit if we couldn't open the config file */
if(fp==NULL){
syslog(LOG_ERR,"Unable to open config file '%s' for reading\n",filename);
return ERROR;
}
line=0;
while(fgets(input_buffer,MAX_INPUT_BUFFER-1,fp)){
line++;
/* skip comments and blank lines */
if(input_buffer[0]=='#')
continue;
if(input_buffer[0]=='\x0')
continue;
if(input_buffer[0]=='\n')
continue;
/* get the variable name */
varname=strtok(input_buffer,"=");
if(varname==NULL){
syslog(LOG_ERR,"No variable name specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
/* get the variable value */
varvalue=strtok(NULL,"\n");
if(varvalue==NULL){
syslog(LOG_ERR,"No variable value specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
/* allow users to specify directories to recurse into for config files */
else if(!strcmp(varname,"include_dir")){
strncpy(config_file,varvalue,sizeof(config_file)-1);
config_file[sizeof(config_file)-1]='\x0';
/* strip trailing / if necessary */
if(config_file[strlen(config_file)-1]=='/')
config_file[strlen(config_file)-1]='\x0';
/* process the config directory... */
if(read_config_dir(config_file)==ERROR)
break;
}
/* allow users to specify individual config files to include */
else if(!strcmp(varname,"include") || !strcmp(varname,"include_file")){
/* process the config file... */
if(read_config_file(varvalue)==ERROR)
break;
}
else if(!strcmp(varname,"server_port")){
server_port=atoi(varvalue);
if(server_port<1024){
syslog(LOG_ERR,"Invalid port number specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
}
else if(!strcmp(varname,"server_address")){
strncpy(server_address,varvalue,sizeof(server_address) - 1);
server_address[sizeof(server_address)-1]='\0';
}
else if(!strcmp(varname,"allowed_hosts")){
if(strlen(input_buffer)>sizeof(allowed_hosts)){
syslog(LOG_ERR,"Allowed hosts list too long in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
strncpy(allowed_hosts,varvalue,sizeof(allowed_hosts));
allowed_hosts[sizeof(allowed_hosts)-1]='\x0';
}
else if(strstr(input_buffer,"command[")){
temp_buffer=strtok(varname,"[");
temp_buffer=strtok(NULL,"]");
if(temp_buffer==NULL){
syslog(LOG_ERR,"Invalid command specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
add_command(temp_buffer,varvalue);
}
else if(strstr(input_buffer,"debug")){
debug=atoi(varvalue);
if(debug>0)
debug=TRUE;
else
debug=FALSE;
}
else if(!strcmp(varname,"nrpe_user"))
nrpe_user=strdup(varvalue);
else if(!strcmp(varname,"nrpe_group"))
nrpe_group=strdup(varvalue);
else if(!strcmp(varname,"dont_blame_nrpe"))
allow_arguments=(atoi(varvalue)==1)?TRUE:FALSE;
else if(!strcmp(varname,"command_timeout")){
command_timeout=atoi(varvalue);
if(command_timeout<1){
syslog(LOG_ERR,"Invalid command_timeout specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
}
else{
syslog(LOG_ERR,"Unknown option specified in config file '%s' - Line %d\n",filename,line);
return ERROR;
}
}
/* close the config file */
fclose(fp);
return OK;
}
