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#define _GNU_SOURCE
#include <ctype.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/syscall.h>
#include <sched.h>
#include <stdatomic.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sched.h>
#include <mqueue.h>
#define DEVMQPATH "/dev/mqueue/"
#define AGNIPATH_IN "agni-%d-in"
#define AGNIPATH_OUT "agni-%d-out"
//------------------------------------------------------------------------------
int main(int argc, char **argv)
{
//generic variables
int c;
int i,j;
int iRet; //any func return param
//for directory listing
DIR *dirPath;
struct dirent *entryPath;
//list all mqs
int flagListAll = 0;
//show mq param
int flagMqParam = 0;
char* mqName = NULL;
//clear message queue
int flagClear = 0;
char* mqNameClear = NULL;
//clear print extra info if there is
int flagExtra = 0;
//send string to queue
int flagSendQueue = 0;
char *mqNameSend = NULL; //mq name where to send
//argument value that to send into queue
int flagSendStr = 0;
char *sStrSend = NULL; //mq string that should be push'ed in queue
//get arguments
while ((c = getopt(argc, argv, "elp:c:s:q:")) != -1)
switch(c)
{
//list all mqueue's
case 'l':
flagListAll = 1;
break;
//show param of mq
case 'p':
flagMqParam = 1;
mqName = optarg;
break;
//get all messages, print out and clean queue
case 'c':
flagClear = 1;
mqNameClear = optarg;
break;
//send string to queue
case 's':
flagSendQueue = 1;
mqNameSend = optarg;
break;
case 'q':
flagSendStr = 1;
sStrSend = optarg;
break;
//show extra information if avaliable
case 'e':
flagExtra = 1;
break;
default:
break;
}
//----------------------------------------------------------------------
//main logic
//list all
if (flagListAll)
{
dirPath = opendir(DEVMQPATH);
if (dirPath != NULL)
{
while (entryPath = readdir(dirPath))
{
int id;
if (entryPath->d_type == DT_REG)
{
if(sscanf(entryPath->d_name, "agni-%d", &id) == 1)
{
printf("%s\n",entryPath->d_name);
}
}
//should free entryPath? maybe
}
closedir(dirPath);
} else
{
perror("Cant open directory");
}
exit(0);
}
//get mqueue params
if (flagMqParam)
{
struct mq_attr mqAttr;
int mqFd = -1;
mqFd = mq_open(mqName, O_RDWR, 0666, NULL);
if (mqFd != -1)
{
iRet = mq_getattr(mqFd, &mqAttr);
if (iRet != -1)
{
printf("FLAGS %8ld, ", mqAttr.mq_flags);
printf("MSG SIZE %8ld, ", mqAttr.mq_msgsize);
printf("CUR MSGS %ld/%ld\n", mqAttr.mq_curmsgs,mqAttr.mq_maxmsg);
}
} else {
printf("Cant open %s\n", mqName);
}
exit(0);
}
//clear mq from messages
if (flagClear)
{
struct mq_attr mqAttr;
int mqFd = -1;
char *cBuf = NULL;
int numRead = -1;
int prio = 0;
int iCountMsg = 0;
mqFd = mq_open(mqNameClear, O_RDWR, 0666, NULL);
if (mqFd == -1)
{
printf("Cant open %s\n", mqName);
exit(1);
}
iRet = mq_getattr(mqFd, &mqAttr);
if (iRet == -1)
{
perror("Cant get attributes");
exit(1);
}
cBuf = malloc(mqAttr.mq_msgsize);
if (cBuf == NULL)
{
exit(1);
}
for (i=0; i<mqAttr.mq_curmsgs; i++)
{
numRead = mq_receive(mqFd, cBuf, mqAttr.mq_msgsize, &prio);
if (numRead == -1)
{
free(cBuf);
exit(0);
}
iCountMsg += 1;
//extra output of message value
if (flagExtra)
{
for (j=0; j<numRead; j++)
{
printf("%c",cBuf[j]);
}
printf("\n");
}
}
free(cBuf);
printf("Readed %d messages from %ld\n", iCountMsg, mqAttr.mq_curmsgs);
exit(0);
}
if (flagSendQueue && flagSendStr)
{
size_t szStr=0;
int mqFd = -1;
int numRead = -1;
int prio = 0;
struct mq_attr mqAttr;
mqFd = mq_open(mqNameSend, O_RDWR, 0666, NULL);
if (mqFd == -1)
{
printf("Cant open %s\n", mqName);
exit(1);
}
iRet = mq_getattr(mqFd, &mqAttr);
if (iRet == -1)
{
perror("Cant get attributes");
exit(1);
}
iRet = mq_send(mqFd, sStrSend, strlen(sStrSend), prio);
if (iRet == -1)
{
perror("Cant send message");
exit(1);
}
exit(0);
}
}
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