diff options
Diffstat (limited to 'user/progR.c')
| -rw-r--r-- | user/progR.c | 67 |
1 files changed, 35 insertions, 32 deletions
diff --git a/user/progR.c b/user/progR.c index 1d47f6b..672318b 100644 --- a/user/progR.c +++ b/user/progR.c @@ -13,28 +13,32 @@ ** s is the initial delay time (defaults to 10) */ -USERMAIN( main ) { - char ch = 'r'; // default character to print - int delay = 10; // initial delay count - int seq = 99; // my sequence number +USERMAIN(main) +{ + char ch = 'r'; // default character to print + int delay = 10; // initial delay count + int seq = 99; // my sequence number char buf[128]; // process the command-line arguments - switch( argc ) { - case 4: delay = str2int( argv[3], 10 ); - // FALL THROUGH - case 3: seq = str2int( argv[2], 10 ); - // FALL THROUGH - case 2: ch = argv[1][0]; - break; + switch (argc) { + case 4: + delay = str2int(argv[3], 10); + // FALL THROUGH + case 3: + seq = str2int(argv[2], 10); + // FALL THROUGH + case 2: + ch = argv[1][0]; + break; default: - sprint( buf, "userR: 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" ); + sprint(buf, "userR: 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"); } /* @@ -55,26 +59,26 @@ USERMAIN( main ) { int32_t pid; int32_t ppid; - restart: +restart: // announce our presence pid = getpid(); ppid = getppid(); - sprint( buf, " %c[%d,%d,%d]", ch, seq, pid, ppid ); - swrites( buf ); + sprint(buf, " %c[%d,%d,%d]", ch, seq, pid, ppid); + swrites(buf); - sleep( SEC_TO_MS(delay) ); + sleep(SEC_TO_MS(delay)); // create the next child in sequence - if( seq < 5 ) { + if (seq < 5) { ++seq; int32_t n = fork(); - switch( n ) { + switch (n) { case -1: // failure? - sprint( buf, "** R[%d] fork code %d\n", pid, n ); - cwrites( buf ); + sprint(buf, "** R[%d] fork code %d\n", pid, n); + cwrites(buf); break; case 0: // child @@ -82,18 +86,17 @@ USERMAIN( main ) { default: // parent --seq; - sleep( SEC_TO_MS(delay) ); + sleep(SEC_TO_MS(delay)); } } // final report - PPID may change, but PID and seq shouldn't pid = getpid(); ppid = getppid(); - sprint( buf, " %c[%d,%d,%d]", ch, seq, pid, ppid ); - swrites( buf ); - - exit( 0 ); + sprint(buf, " %c[%d,%d,%d]", ch, seq, pid, ppid); + swrites(buf); - return( 42 ); // shut the compiler up! + exit(0); + return (42); // shut the compiler up! } |