1<- Back	/phlog	kroovy.de	70
i	Err	kroovy.de	70
ibsleep - Breakable sleep in C	Err	kroovy.de	70
i=============================	Err	kroovy.de	70
i	Err	kroovy.de	70
iA couple of days ago I stumbled upon an improvised breakable sleep.	Err	kroovy.de	70
iI wrote about in another post:	Err	kroovy.de	70
12024-06-25 - bsleep (bashism)	/phlog/bsleep.gph	kroovy.de	70
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iSince I generally strife to get independant from the use of bashisms, I	Err	kroovy.de	70
idecided to rewrite bsleep in C.	Err	kroovy.de	70
i	Err	kroovy.de	70
iAnd here we go...	Err	kroovy.de	70
i	Err	kroovy.de	70
iBreakable sleep in C. The button 'b' breaks the sleep. This can be used	Err	kroovy.de	70
ito chain two tasks on the commandline, with the second task only waiting	Err	kroovy.de	70
ifor you to press 'b'.	Err	kroovy.de	70
i	Err	kroovy.de	70
i      git clone git://kroovy.de/bsleep	Err	kroovy.de	70
i	Err	kroovy.de	70
iBuild dependencies	Err	kroovy.de	70
i- C compiler	Err	kroovy.de	70
i- libc	Err	kroovy.de	70
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iThis program is meant to help people complete tasks on the commandline.	Err	kroovy.de	70
iAlso the source code can be studied as a simple approach to forking a	Err	kroovy.de	70
iprocess in C.	Err	kroovy.de	70
i	Err	kroovy.de	70
i      #include <signal.h>	Err	kroovy.de	70
i      #include <stdio.h>	Err	kroovy.de	70
i      #include <stdlib.h>	Err	kroovy.de	70
i      #include <unistd.h>	Err	kroovy.de	70
i      	Err	kroovy.de	70
i      int	Err	kroovy.de	70
i      main(void)	Err	kroovy.de	70
i      {	Err	kroovy.de	70
i          int i,in,pid;	Err	kroovy.de	70
i          pid = fork();	Err	kroovy.de	70
i          	Err	kroovy.de	70
i          if (pid == 0) {	Err	kroovy.de	70
i              /* child */	Err	kroovy.de	70
i              for (i=1;;i++) {	Err	kroovy.de	70
i                  printf("%d ", i); fflush(stdout); /* comment out if you prefer silent */	Err	kroovy.de	70
i                  sleep(1);	Err	kroovy.de	70
i              }	Err	kroovy.de	70
i              return 0;	Err	kroovy.de	70
i            	Err	kroovy.de	70
i          } else if (pid > 0) {	Err	kroovy.de	70
i              /* parent */	Err	kroovy.de	70
i              system ("/bin/stty raw");	Err	kroovy.de	70
i              while ((in = getchar()) != 'b') {	Err	kroovy.de	70
i                  printf("%c ", in);	Err	kroovy.de	70
i              }	Err	kroovy.de	70
i              system ("/bin/stty cooked");	Err	kroovy.de	70
i              printf("\n");	Err	kroovy.de	70
i              kill(pid, SIGKILL); /* kill child */	Err	kroovy.de	70
i              return 0;	Err	kroovy.de	70
i              	Err	kroovy.de	70
i          } else {	Err	kroovy.de	70
i              return -1;	Err	kroovy.de	70
i          }	Err	kroovy.de	70
i          return 0;	Err	kroovy.de	70
i      }	Err	kroovy.de	70
i	Err	kroovy.de	70
hasciinema	URL:https://asciinema.org/a/8zUsN5SjoixAZjRvcOURs0lG2	kroovy.de	70
i	Err	kroovy.de	70
iFootnote:	Err	kroovy.de	70
iThe invocation of the operating system command "/bin/stty" via system()	Err	kroovy.de	70
iis not the most elegant. At the moment this needed to read the character	Err	kroovy.de	70
iwithout the need to press Enter.	Err	kroovy.de	70
iIf possible I will try to replace the call system("/bin/stty ...") in the	Err	kroovy.de	70
ifuture.	Err	kroovy.de	70
12024-06-30 - bsleep (rewritten in C)	/phlog/bsleep-c.gph	kroovy.de	70
.