35 lines
855 B
C
35 lines
855 B
C
/*
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* alarm.c
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*
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* Simple synchronous alarm program. This is used as a
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* reference for progressive examples of asynchronous
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* alarm programs.
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*/
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#include "errors.h"
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int main (int argc, char *argv[])
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{
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int seconds;
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char line[128];
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char message[64];
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while (1) {
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printf ("Alarm> ");
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if (fgets (line, sizeof (line), stdin) == NULL) exit (0);
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if (strlen (line) <= 1) continue;
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/*
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* Parse input line into seconds (%d) and a message
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* (%64[^\n]), consisting of up to 64 characters
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* separated from the seconds by whitespace.
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*/
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if (sscanf (line, "%d %64[^\n]",
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&seconds, message) < 2) {
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fprintf (stderr, "Bad command\n");
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} else {
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sleep (seconds);
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printf ("(%d) %s\n", seconds, message);
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}
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}
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}
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