4.1cBSD/usr/src/ucb/man.c
#ifndef lint
static char sccsid[] = " @(#)man.c 1.5 (Berkeley) 3/7/83";
#endif
#include <stdio.h>
#include <ctype.h>
#include <sgtty.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
/*
* man
*/
int nomore;
int cflag;
char *manpath = "/usr/man";
char *strcpy();
char *strcat();
char *trim();
int remove();
int section;
int subsec;
int troffit;
int killtmp;
#define eq(a,b) (strcmp(a,b) == 0)
main(argc, argv)
int argc;
char *argv[];
{
if (signal(SIGINT, SIG_IGN) == SIG_DFL) {
signal(SIGINT, remove);
signal(SIGQUIT, remove);
signal(SIGTERM, remove);
}
umask(0);
if (argc <= 1) {
fprintf(stderr, "Usage: man [ section ] name ...\n");
fprintf(stderr, "or: man -k keyword ...\n");
fprintf(stderr, "or: man -f file ...\n");
exit(1);
}
argc--, argv++;
while (argc > 0 && argv[0][0] == '-') {
switch(argv[0][1]) {
case 0:
nomore++;
break;
case 't':
troffit++;
break;
case 'k':
apropos(argc-1, argv+1);
exit(0);
case 'f':
whatis(argc-1, argv+1);
exit(0);
case 'P':
argc--, argv++;
manpath = *argv;
break;
}
argc--, argv++;
}
if (chdir(manpath) < 0) {
fprintf(stderr, "Can't chdir to %s.\n", manpath);
exit(1);
}
if (troffit == 0 && nomore == 0 && !isatty(1))
nomore++;
section = 0;
do {
if (eq(argv[0], "local")) {
section = 'l';
goto sectin;
} else if (eq(argv[0], "new")) {
section = 'n';
goto sectin;
} else if (eq(argv[0], "public")) {
section = 'p';
goto sectin;
} else if (argv[0][0] >= '0' && argv[0][0] <= '9' && (argv[0][1] == 0 || argv[0][2] == 0)) {
section = argv[0][0];
subsec = argv[0][1];
sectin:
argc--, argv++;
if (argc == 0) {
fprintf(stderr, "But what do you want from section %s?\n", argv[-1]);
exit(1);
}
continue;
}
manual(section, argv[0]);
argc--, argv++;
} while (argc > 0);
exit(0);
}
manual(sec, name)
char sec;
char *name;
{
char section = sec;
char work[100], work2[100], cmdbuf[100];
int ss;
struct stat stbuf, stbuf2;
int last;
char *sp = "1nl6823457p";
strcpy(work, "manx/");
strcat(work, name);
strcat(work, ".x");
last = strlen(work) - 1;
if (section == '1') {
sp = "1nlo";
section = 0;
}
if (section == 0) {
ss = 0;
for (section = *sp++; section; section = *sp++) {
work[3] = section;
work[last] = section;
work[last+1] = 0;
if (stat(work, &stbuf) >= 0)
break;
if (work[last] >= '1' && work[last] <= '4') {
char *cp;
search:
switch (work[last]) {
case '1': cp = "mcgv"; break;
case '2': cp = "v"; break;
case '3': cp = "jxmsfnv"; break;
case '4': cp = "pfvsn"; break;
case '8': cp = "vc"; break;
}
while (*cp) {
work[last+1] = *cp++;
if (stat(work, &stbuf) >= 0) {
ss = work[last+1];
goto found;
}
}
if (ss = 0)
work[last+1] = 0;
}
}
if (section == 0) {
if (sec == 0)
printf("No manual entry for %s.\n", name);
else
printf("No entry for %s in section %c of the manual.\n", name, sec);
return;
}
} else {
work[3] = section;
work[last] = section;
work[last+1] = subsec;
if (stat(work, &stbuf) < 0) {
if ((section >= '1' && section <= '4') && subsec == 0) {
sp = "\0";
goto search;
}
printf("No entry for %s in section %c", name, section);
if (subsec)
putchar(subsec);
printf(" of the manual.\n");
return;
}
}
found:
if (troffit)
troff(work);
else {
FILE *it;
char abuf[BUFSIZ];
if (!nomore) {
if ((it = fopen(work, "r")) == NULL) {
perror(work);
exit(1);
}
if (fgets(abuf, BUFSIZ-1, it) &&
abuf[0] == '.' && abuf[1] == 's' &&
abuf[2] == 'o' && abuf[3] == ' ') {
register char *cp = abuf+strlen(".so ");
char *dp;
while (*cp && *cp != '\n')
cp++;
*cp = 0;
while (cp > abuf && *--cp != '/')
;
dp = ".so man";
if (cp != abuf+strlen(dp)+1) {
tohard:
nomore = 1;
strcpy(work, abuf+4);
goto hardway;
}
for (cp = abuf; *cp == *dp && *cp; cp++, dp++)
;
if (*dp)
goto tohard;
strcpy(work, cp-3);
}
fclose(it);
strcpy(work2, "cat");
strcpy(work2+3, work+3);
work2[4] = 0;
if (stat(work2, &stbuf2) < 0)
goto hardway;
strcpy(work2+3, work+3);
if (stat(work2, &stbuf2) < 0 || stbuf2.st_mtime < stbuf.st_mtime) {
printf("Reformatting page. Wait...");
fflush(stdout);
unlink(work2);
sprintf(cmdbuf,
"nroff -h -man %s > /tmp/man%d; trap '' 1 15; mv /tmp/man%d %s", work, getpid(), getpid(), work2);
if (system(cmdbuf)) {
printf(" aborted (sorry)\n");
remove();
/*NOTREACHED*/
}
printf(" done\n");
}
strcpy(work, work2);
}
hardway:
nroff(work);
}
}
nroff(cp)
char *cp;
{
char cmd[BUFSIZ];
sprintf(cmd, nomore ?
"%s %s" : "%s %s|/usr/ucb/ul|/usr/ucb/more -f",
cp[0] == 'c' ? "cat -s" : "nroff -man", cp);
system(cmd);
}
troff(cp)
char *cp;
{
char cmdbuf[BUFSIZ];
sprintf(cmdbuf,
"troff -t -man /usr/lib/tmac/tmac.vcat %s|/usr/lib/rvsort|/usr/ucb/vpr -t",
cp);
system(cmdbuf);
}
any(c, sp)
register int c;
register char *sp;
{
register int d;
while (d = *sp++)
if (c == d)
return (1);
return (0);
}
remove()
{
char name[15];
sprintf(name, "/tmp/man%d", getpid());
unlink(name);
exit(1);
}
apropos(argc, argv)
int argc;
char **argv;
{
char buf[BUFSIZ];
char *gotit;
register char **vp;
if (argc == 0) {
fprintf(stderr, "man: -k what?\n");
exit(1);
}
if (freopen("/usr/lib/whatis", "r", stdin) == NULL) {
perror("/usr/lib/whatis");
exit (1);
}
gotit = (char *) calloc(1, blklen(argv));
while (fgets(buf, sizeof buf, stdin) != NULL)
for (vp = argv; *vp; vp++)
if (match(buf, *vp)) {
printf("%s", buf);
gotit[vp - argv] = 1;
for (vp++; *vp; vp++)
if (match(buf, *vp))
gotit[vp - argv] = 1;
break;
}
for (vp = argv; *vp; vp++)
if (gotit[vp - argv] == 0)
printf("%s: nothing apropriate\n", *vp);
}
match(buf, str)
char *buf, *str;
{
register char *bp, *cp;
bp = buf;
for (;;) {
if (*bp == 0)
return (0);
if (amatch(bp, str))
return (1);
bp++;
}
}
amatch(cp, dp)
register char *cp, *dp;
{
while (*cp && *dp && lmatch(*cp, *dp))
cp++, dp++;
if (*dp == 0)
return (1);
return (0);
}
lmatch(c, d)
char c, d;
{
if (c == d)
return (1);
if (!isalpha(c) || !isalpha(d))
return (0);
if (islower(c))
c = toupper(c);
if (islower(d))
d = toupper(d);
return (c == d);
}
blklen(ip)
register int *ip;
{
register int i = 0;
while (*ip++)
i++;
return (i);
}
whatis(argc, argv)
int argc;
char **argv;
{
register char **avp;
if (argc == 0) {
fprintf(stderr, "man: -f what?\n");
exit(1);
}
if (freopen("/usr/lib/whatis", "r", stdin) == NULL) {
perror("/usr/lib/whatis");
exit (1);
}
for (avp = argv; *avp; avp++)
*avp = trim(*avp);
whatisit(argv);
exit(0);
}
whatisit(argv)
char **argv;
{
char buf[BUFSIZ];
register char *gotit;
register char **vp;
gotit = (char *)calloc(1, blklen(argv));
while (fgets(buf, sizeof buf, stdin) != NULL)
for (vp = argv; *vp; vp++)
if (wmatch(buf, *vp)) {
printf("%s", buf);
gotit[vp - argv] = 1;
for (vp++; *vp; vp++)
if (wmatch(buf, *vp))
gotit[vp - argv] = 1;
break;
}
for (vp = argv; *vp; vp++)
if (gotit[vp - argv] == 0)
printf("%s: not found\n", *vp);
}
wmatch(buf, str)
char *buf, *str;
{
register char *bp, *cp;
bp = buf;
again:
cp = str;
while (*bp && *cp && lmatch(*bp, *cp))
bp++, cp++;
if (*cp == 0 && (*bp == '(' || *bp == ',' || *bp == '\t' || *bp == ' '))
return (1);
while (isalpha(*bp) || isdigit(*bp))
bp++;
if (*bp != ',')
return (0);
bp++;
while (isspace(*bp))
bp++;
goto again;
}
char *
trim(cp)
register char *cp;
{
register char *dp;
for (dp = cp; *dp; dp++)
if (*dp == '/')
cp = dp + 1;
if (cp[0] != '.') {
if (cp + 3 <= dp && dp[-2] == '.' && any(dp[-1], "cosa12345678npP"))
dp[-2] = 0;
if (cp + 4 <= dp && dp[-3] == '.' && any(dp[-2], "13") && isalpha(dp[-1]))
dp[-3] = 0;
}
return (cp);
}
system(s)
char *s;
{
int status, pid, w;
if ((pid = vfork()) == 0) {
execl("/bin/sh", "sh", "-c", s, 0);
_exit(127);
}
while ((w = wait(&status)) != pid && w != -1)
;
if (w == -1)
status = -1;
return (status);
}