Linux C语言 如何判断该进程是否还存在

虽然shell很方便，但是我用QT的话，接shell就不方便了，这是网上拷贝的，与君分享：

 

int detect_process(char * process_name) { FILE *ptr; char buff[512]; char ps[128]; sprintf(ps,"ps -e | grep -c ' %s</p>",process_name); strcpy(buff,"ABNORMAL"); if((ptr=popen(ps, "r")) != NULL) { while (fgets(buff, 512, ptr) != NULL) { if(atoi(buff)>=2) { pclose(ptr); return CONFLICT; } } } if(strcmp(buff,"ABNORMAL")==0) /*ps command error*/ return ERROR; pclose(ptr); return NOERROR; }