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#include <common.h>
/**
** User function main #2: write
**
** Prints its ID, then loops N times delaying and printing, then returns
** without calling exit(). Verifies the return byte count from each call
** to write().
**
** Invoked as: main2 x n
** where x is the ID character
** n is the iteration count
*/
USERMAIN(main)
{
int n;
int count = 30; // default iteration count
char ch = '2'; // default character to print
char buf[128];
// process the command-line arguments
switch (argc) {
case 3:
count = str2int(argv[2], 10);
// FALL THROUGH
case 2:
ch = argv[1][0];
break;
default:
sprint(buf, "main2: 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
n = swritech(ch);
if (n != 1) {
sprint(buf, "== %c, write #1 returned %d\n", ch, n);
cwrites(buf);
}
// iterate and print the required number of other characters
for (int i = 0; i < count; ++i) {
DELAY(STD);
n = swritech(ch);
if (n != 1) {
sprint(buf, "== %c, write #2 returned %d\n", ch, n);
cwrites(buf);
}
}
// all done!
return (0);
}
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