Programming

#include <stdlib.h>
#include <stdio.h>

void run_cmd(char *cmd)
{
	FILE *shellcommand=popen(cmd,"r");
	char tmp[256]={0x0};
	if(shellcommand==NULL)
	{
		perror("command failure");
		exit(EXIT_FAILURE);
	}
	while(fgets(tmp,sizeof(tmp),shellcommand) )
	{
		printf("%s", tmp);
	}
	pclose(shellcommand);
}


int main()
{
	run_cmd("ps -ef | grep 'job_name' | grep -v grep");
    return 0;
}

int  run_cmd(char *dest, char *cmd)
{
             int retval=0; 
	FILE *shellcommand=popen(cmd,"r");
	char tmp[256]={0x0};
    
             *dest = 0x0;
	if(shellcommand==NULL)
	{
		perror("command failure");
		exit(EXIT_FAILURE);
	}
	while(fgets(tmp,sizeof(tmp),shellcommand) )
	{
                          retval=1 /* means we found at least one */  
                          strcat(dest, tmp);
	}
	pclose(shellcommand);
             return retval;
}

int main()
{
    char result[1024]={0x0};
    if (run_cmd(result, "ps -ef | grep 'job_name' | grep -v grep")==1)
    {
          printf("%s", result);
    }
    return 0;
}