minix/commands/fortune/fortune.c
Lionel Sambuc 0ac803292e Fix warnings trivial warnings.
Fix warnings about:
 . Unused variables
 . format mismatch in printf/scanf format string and arguments
 . Missing parenthesis around assignment as truth values
 . Clang warnings anout unknown GCC pragma
2013-01-14 11:44:31 +01:00

77 lines
1.7 KiB
C

/* fortune - hand out Chinese fortune cookies Author: Bert Reuling */
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#define COOKIEJAR "/usr/lib/fortune.dat"
#if 0
static char *Copyright = "\0Copyright (c) 1990 Bert Reuling";
#endif
static unsigned long seed;
int main(int argc, char **argv);
unsigned long magic(unsigned long range);
int main(argc, argv)
int argc;
char *argv[];
{
int c1, c2, c3;
struct stat cookie_stat;
FILE *cookie;
if ((cookie = fopen(COOKIEJAR, "r")) == NULL) {
printf("\nSome things better stay closed.\n - %s\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.
*/
seed = time( (time_t *) 0) ^ (long) getuid() ^ (long) getpid();
if (stat(COOKIEJAR, &cookie_stat) != 0) {
printf("\nIt furthers one to see the super guru.\n - %s\n", argv[0]);
exit (-1);
}
fseek(cookie, magic((unsigned long) cookie_stat.st_size), 0); /* m ove bu magic... */
c2 = c3 = '\n';
while (((c1 = getc(cookie)) != EOF) && ((c1 != '%') || (c2 != '%') || (c3 != '\n'))) {
c3 = c2;
c2 = c1;
}
if (c1 == EOF) {
printf("\nSomething unexpected has happened.\n - %s", argv[0]);
exit (-1);
}
c2 = c3 = '\n';
while (((c1 = getc(cookie)) != '%') || (c2 != '%') || (c3 != '\n')) {
if (c1 == EOF) {
rewind(cookie);
continue;
}
putc(c2, stdout);
c3 = c2;
c2 = c1;
}
putc('\n', stdout);
fclose(cookie);
return (0);
}
/* magic - please study carefull: there is more than meets the eye */
unsigned long magic(range)
unsigned long range;
{
seed = 9065531L * (seed % 9065533L) - 2 * (seed / 9065531L) + 1L;
return (seed % range);
}