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ckustr.c
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C/C++ Source or Header
|
1992-11-23
|
5KB
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270 lines
#include <stdio.h>
#include <sysexits.h>
/* string extraction/restoration routines */
/*
STR_FILE must be defined as a quoted string on the cc command line,
for example:
-DSTR_FILE=\\\"/usr/local/lib/kermit5.sr\\\"
This is the file where the strings go, and where C-Kermit looks for them
at runtime.
*/
#ifdef STR_FILE
char *StringFile = STR_FILE;
#else
char *StringFile = "/usr/local/lib/kermit5.sr";
#endif /* STR_FILE */
#ifdef STR_CTIMED
char *Ctimed = STR_CTIMED;
#else
char *Ctimed = "/usr/lib/ctimed";
#endif
extern int errno;
static int strfile = -1, ourpid = 0;
#define BUFLEN 256
errprep(offset, buf)
unsigned short offset;
char *buf;
{
register int pid = getpid();
if (pid != ourpid) {
ourpid = pid;
if (strfile >= 0) {
close(strfile);
strfile = -1;
}
}
if (strfile < 0) {
char *p, *getenv();
if (p = getenv("KSTR"))
if (strlen(p))
StringFile = p;
strfile = open(StringFile, 0);
if (strfile < 0) {
oops:
fprintf(stderr, "Cannot find %s\r\n", StringFile);
exit(EX_OSFILE);
}
}
if (lseek(strfile, (long) offset, 0) < 0
|| read(strfile, buf, BUFLEN) <= 0)
goto oops;
}
/* extracted string front end for printf() */
/*VARARGS1*/
strprerror(fmt, a, b, c, d, e, f, g, h, i, j, k, l)
int fmt;
{
char buf[BUFLEN];
errprep(fmt, buf);
printf(buf, a, b, c, d, e, f, g, h, i ,j, k, l);
}
/* extracted string front end for sprintf() */
/*VARARGS1*/
strsrerror(fmt, obuf, a, b, c, d, e, f, g, h, i, j, k, l)
int fmt;
char *obuf;
{
char buf[BUFLEN];
errprep(fmt, buf);
sprintf(obuf, buf, a, b, c, d, e, f, g, h, i, j, k, l);
}
/* extracted string front end for fprintf() */
/*VARARGS1*/
strfrerror(fmt, fd, a, b, c, d, e, f, g, h, i, j, k, l)
int fmt, fd;
{
char buf[BUFLEN];
errprep(fmt, buf);
fprintf(fd, buf, a, b, c, d, e, f, g, h, i, j, k, l);
}
/* extracted string front end for perror() */
strperror(fmt)
int fmt;
{
char buf[BUFLEN];
register int saverr = errno;
errprep(fmt, buf);
errno = saverr;
perror(buf);
}
perror(str)
char *str;
{
printf("%s: errno %d\n", str, errno);
}
#include <sys/types.h>
#include <sys/time.h>
#define SEND_FD W[1]
#define RECV_FD R[0]
#define CTIME 1
#define ASCTIME 2
#define TZSET 3
#define LOCALTIME 4
#define GMTIME 5
#define OFFTIME 6
static int R[2], W[2], inited;
static char result[26];
static struct tm tmtmp;
char *
ctime(t)
time_t *t;
{
u_char fnc = CTIME;
sewer();
write(SEND_FD, fnc, sizeof fnc);
write(SEND_FD, t, sizeof (*t));
getb(RECV_FD, result, 26);
return(result);
}
char *
asctime(tp)
struct tm *tp;
{
u_char fnc = ASCTIME;
sewer();
write(SEND_FD, &fnc, sizeof fnc);
write(SEND_FD, tp, sizeof (*tp));
getb(RECV_FD, result, 26);
return(result);
}
void
tzset()
{
u_char fnc = TZSET;
sewer();
write(SEND_FD, &fnc, sizeof fnc);
}
struct tm *
localtime(tp)
time_t *tp;
{
u_char fnc = LOCALTIME;
sewer();
write(SEND_FD, &fnc, sizeof fnc);
write(SEND_FD, tp, sizeof (*tp));
getb(RECV_FD, &tmtmp, sizeof tmtmp);
getb(RECV_FD, result, 24);
tmtmp.tm_zone = result;
return(&tmtmp);
}
struct tm *
gmtime(tp)
time_t *tp;
{
u_char fnc = GMTIME;
sewer();
write(SEND_FD, &fnc, sizeof fnc);
write(SEND_FD, tp, sizeof (*tp));
getb(RECV_FD, &tmtmp, sizeof tmtmp);
getb(RECV_FD, result, 24);
tmtmp.tm_zone = result;
return(&tmtmp);
}
struct tm *
offtime(clock, offset)
time_t *clock;
long offset;
{
u_char fnc = OFFTIME;
sewer();
write(SEND_FD, &fnc, sizeof fnc);
write(SEND_FD, clock, sizeof (*clock));
write(SEND_FD, &offset, sizeof offset);
getb(RECV_FD, &tmtmp, sizeof tmtmp);
tmtmp.tm_zone = "";
return(&tmtmp);
}
getb(f, p, n)
register int f, n;
register char *p;
{
int i;
while (n)
{
i = read(f, p, n);
if (i <= 0)
return;
p += i;
n -= i;
}
}
sewer()
{
register int pid, ourpid = getpid();
if (inited == ourpid)
return;
if (inited)
{
close(SEND_FD);
close(RECV_FD);
}
pipe(W);
pipe(R);
pid = vfork();
if (pid == 0)
{ /* child */
alarm(0); /* cancel alarms */
dup2(W[0], 0); /* parent write side to our stdin */
dup2(R[1], 1); /* parent read side to our stdout */
close(SEND_FD); /* copies made, close the... */
close(RECV_FD); /* originals now */
execl(Ctimed, "ctimed", 0);
_exit(EX_OSFILE);
}
if (pid == -1)
abort(); /* nothing else really to do */
close(W[0]); /* close read side of SEND channel */
close(R[1]); /* close write side of RECV channel */
inited = ourpid; /* don't do this again in this proc */
}
XXctime()
{
if (SEND_FD)
close(SEND_FD);
if (RECV_FD)
close(RECV_FD);
SEND_FD = RECV_FD = 0;
inited = 0;
}