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1 | /* fortune.c Larn is copyrighted 1986 by Noah Morgan. */ |
2 | #include <sys/types.h> | |
3 | #include <sys/stat.h> | |
4 | ||
5 | #ifndef BSD4.1 | |
6 | #include <fcntl.h> | |
7 | #else BSD4.1 | |
8 | #define O_RDONLY 0 | |
9 | #endif BSD4.1 | |
10 | ||
11 | #include "header.h" | |
12 | /* | |
13 | * function to return a random fortune from the fortune file | |
14 | */ | |
15 | static char *base=0; /* pointer to the fortune text */ | |
16 | static char **flines=0; /* array of pointers to each fortune */ | |
17 | static int fd=0; /* true if we have load the fortune info */ | |
18 | static int nlines=0; /* # lines in fortune database */ | |
19 | ||
20 | char *fortune(file) | |
21 | char *file; | |
22 | { | |
23 | register char *p; | |
24 | register int lines,tmp; | |
25 | struct stat stat; | |
26 | char *malloc(); | |
27 | if (fd==0) | |
28 | { | |
29 | if ((fd=open(file,O_RDONLY)) < 0) /* open the file */ | |
30 | return(0); /* can't find file */ | |
31 | ||
32 | /* find out how big fortune file is and get memory for it */ | |
33 | stat.st_size = 16384; | |
34 | if ((fstat(fd,&stat) < 0) || ((base=malloc(1+stat.st_size)) == 0)) | |
35 | { | |
36 | close(fd); fd= -1; free((char*)base); return(0); /* can't stat file */ | |
37 | } | |
38 | ||
39 | /* read in the entire fortune file */ | |
40 | if (read(fd,base,stat.st_size) != stat.st_size) | |
41 | { | |
42 | close(fd); fd= -1; free((char*)base); return(0); /* can't read file */ | |
43 | } | |
44 | close(fd); base[stat.st_size]=0; /* final NULL termination */ | |
45 | ||
46 | /* count up all the lines (and NULL terminate) to know memory needs */ | |
47 | for (p=base,lines=0; p<base+stat.st_size; p++) /* count lines */ | |
48 | if (*p == '\n') *p=0,lines++; | |
49 | nlines = lines; | |
50 | ||
51 | /* get memory for array of pointers to each fortune */ | |
52 | if ((flines=(char**)malloc(nlines*sizeof(char*))) == 0) | |
53 | { | |
54 | free((char*)base); fd= -1; return(0); /* malloc() failure */ | |
55 | } | |
56 | ||
57 | /* now assign each pointer to a line */ | |
58 | for (p=base,tmp=0; tmp<nlines; tmp++) | |
59 | { | |
60 | flines[tmp]=p; while (*p++); /* advance to next line */ | |
61 | } | |
62 | } | |
63 | ||
64 | if (fd > 2) /* if we have a database to look at */ | |
65 | return(flines[rund((nlines<=0)?1:nlines)]); | |
66 | else | |
67 | return(0); | |
68 | } |