From 6af21e6a4f2251e71353562d5df7f376fdffc270 Mon Sep 17 00:00:00 2001 From: Freya Murphy Date: Tue, 25 Mar 2025 17:36:52 -0400 Subject: initial checkout from wrc --- user/progS.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 user/progS.c (limited to 'user/progS.c') diff --git a/user/progS.c b/user/progS.c new file mode 100644 index 0000000..d220955 --- /dev/null +++ b/user/progS.c @@ -0,0 +1,50 @@ +#include + +/** +** User function S: exit, sleep, write +** +** Reports itself, then loops forever, sleeping on each iteration +** +** Invoked as: userS x [ s ] +** where x is the ID character +** s is the sleep time (defaults to 20) +*/ + +USERMAIN( main ) { + char ch = 's'; // default character to print + int nap = 20; // nap time + char buf[128]; + + // process the command-line arguments + switch( argc ) { + case 3: nap = str2int( argv[2], 10 ); + // FALL THROUGH + case 2: ch = argv[1][0]; + break; + default: + sprint( buf, "userS: argc %d, args: ", argc ); + cwrites( buf ); + for( int i = 0; i <= argc; ++i ) { + sprint( buf, " %s", argv[argc] ? argv[argc] : "(null)" ); + cwrites( buf ); + } + cwrites( "\n" ); + } + + // announce our presence + write( CHAN_SIO, &ch, 1 ); + + sprint( buf, "userS sleeping %d(%d)\n", nap, SEC_TO_MS(nap) ); + cwrites( buf ); + + for(;;) { + sleep( SEC_TO_MS(nap) ); + write( CHAN_SIO, &ch, 1 ); + } + + sprint( buf, "!! %c exiting!?!?!?\n", ch ); + cwrites( buf ); + exit( 1 ); + + return( 42 ); // shut the compiler up! +} -- cgit v1.2.3-freya