c - two blocking operations in one process -

i have 2 simple jobs. 1st reading pipe. , 2nd operations timeout. problem make work in 1 process (i khow way in 2 process unsuitable me..).

and there reasons dont use cron. 2 jobs should runned run asyncronically (non blocking each other).

any ideas?

#include<stdio.h>                                                                                                                                 #include<stdlib.h>  void someanotherjob();  main(){     printf ("hello!\n");     int c;     file *file, *file2;      file = fopen("/dev/ttyusb0", "r");     file2 = fopen("out.txt", "a");      if (file) {         while ((c = getc(file)) != eof){             fputc(c, file2);             fflush(file2);         }         fclose(file);     }       while (1) {         someanotherjob();         sleep(10);     }  }  void someanotherjob() {     printf("yii\n"); } 

you can use select nonblocking i/o many descriptors:

fd_set rfds; fd_zero(&rfds); file* files[2];  if( !( files[0] = fopen( "/dev/ttyusb0", "r"))     // error  if( !( files[1] = fopen( "out.txt", "a"))     // error  // each file opened fd_set( fileno( files[i]), &rfds);  int returned = select( highfd + 1, &rfds, null, null, null);  if ( returned) {     // each file opened         if ( fd_isset( fileno( files[i]), &rfds)) {             // read             printf( "descriptor %d ready read", i);         }     } }