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- /* fortune.c Larn is copyrighted 1986 by Noah Morgan. */
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <fcntl.h>
-
- #include "header.h"
- /*
- * function to return a random fortune from the fortune file
- */
- static char *base=0; /* pointer to the fortune text */
- static char **flines=0; /* array of pointers to each fortune */
- static int fd=0; /* true if we have load the fortune info */
- static int nlines=0; /* # lines in fortune database */
-
- char *fortune(file)
- char *file;
- {
- register char *p;
- register int lines,tmp;
- struct stat stat;
- char *malloc();
- if (fd==0)
- {
- if ((fd=open(file,O_RDONLY)) < 0) /* open the file */
- return(0); /* can't find file */
-
- /* find out how big fortune file is and get memory for it */
- stat.st_size = 16384;
- if ((fstat(fd,&stat) < 0) || ((base=malloc(1+stat.st_size)) == 0))
- {
- close(fd); fd= -1; free((char*)base); return(0); /* can't stat file */
- }
-
- /* read in the entire fortune file */
- if (read(fd,base,stat.st_size) != stat.st_size)
- {
- close(fd); fd= -1; free((char*)base); return(0); /* can't read file */
- }
- close(fd); base[stat.st_size]=0; /* final NULL termination */
-
- /* count up all the lines (and NULL terminate) to know memory needs */
- for (p=base,lines=0; p<base+stat.st_size; p++) /* count lines */
- if (*p == '\n') *p=0,lines++;
- nlines = lines;
-
- /* get memory for array of pointers to each fortune */
- if ((flines=(char**)malloc(nlines*sizeof(char*))) == 0)
- {
- free((char*)base); fd= -1; return(0); /* malloc() failure */
- }
-
- /* now assign each pointer to a line */
- for (p=base,tmp=0; tmp<nlines; tmp++)
- {
- flines[tmp]=p; while (*p++); /* advance to next line */
- }
- }
-
- if (fd > 2) /* if we have a database to look at */
- return(flines[rund((nlines<=0)?1:nlines)]);
- else
- return(0);
- }
-