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OS/2 Shareware BBS: 8 Other
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08-Other.zip
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OS2MNX1.ZIP
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FORTUNE.C
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1989-12-24
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3KB
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110 lines
/*
* fortune - hand out Chinese fortune cookies
*/
/* $Header: D:/RCS/RCS/fortune.c 1.1 89/12/24 21:43:01 RCA Exp $
* $Log: fortune.c $
* Revision 1.1 89/12/24 21:43:01 RCA
* Initial revision
*
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <time.h>
/* RCA no, I don't think so...
* #define COOKIEJAR "/usr/games/lib/fortunes.dat"
*/
#define COOKIEJAR "fortunes.dat"
static char *Copyright = "\0fortune v1.1 Copyright (c) 1988 Bert Reuling";
long seed;
main(argc, argv)
int argc;
char *argv[];
{
int c1, c2, c3;
long magic();
struct stat cookie_stat;
FILE *cookie, *out, *fopen(), *popen();
if ((cookie = fopen(COOKIEJAR, "r")) == NULL) {
fprintf(stderr, "%s:\nSomeone closed the cookie jar!\n", argv[0]);
exit(-1);
}
/*
* create seed from : date, time, user-id and process-id
* we can't get the position of the moon, unfortunately.
* Note that super cookies are not affected by chance...
*/
/* RCA revise for OS/2
* seed = time(0L) * (long) getuid() * (long) getpid();
*/
seed = time(0L) * (long) getpid();
if (stat(COOKIEJAR, &cookie_stat) != 0) {
fprintf(stderr, "%s:\nCannot stat cookie jar\n", argv[0]);
exit(-1);
}
fseek(cookie, magic((long) cookie_stat.st_size), 0); /* move by magic... */
c2 = c3 = '\n';
while (((c1 = getc(cookie)) != EOF) && ((c1 != '%') || (c2 != '%') || (c3 != '\n'))) {
c3 = c2;
c2 = c1;
}
if (c1 == EOF) {
fprintf(stderr, "%s:\n", argv[0]);
fprintf(stderr, "The cookie jar does not have a bottom!\n");
fprintf(stderr, "All cookies have fallen out...\n");
exit(-1);
}
#ifdef FORMATTER
if ((out = popen(FORMATTER, "w")) == NULL) {
fprintf(stderr, "%s:\nIt furthers one to see a plumber!\n", argv[0]);
exit(-1);
}
#else
out = stdout;
#endif
c2 = c3 = '\n';
while (((c1 = getc(cookie)) != '%') || (c2 != '%') || (c3 != '\n')) {
if (c1 == EOF) {
rewind(cookie);
continue;
}
putc(c2, out);
c3 = c2;
c2 = c1;
}
putc('\n', out);
fclose(cookie);
#ifdef FORMATTER
pclose(out);
#endif
exit(0);
}
/*
* magic - please study carefull: there is more than meets the eye
*/
long magic(range)
long range;
{
int i;
for (i = 0; i < 1234; i++)
seed = 883L * (seed % 881L) - 2 * (seed / 883L) + 1L;
return ((long)((int)(seed & 0x7fffL) * range / 0x7fffL));
}