ref: 4308f6e7e6586e3a27aa46c4d54c434b8533b16d
dir: /sys/src/cmd/auth/warning.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <auth.h>
#include <authsrv.h>
#include "authcmdlib.h"
/* working directory */
Dir *dirbuf;
long ndirbuf = 0;
int debug;
long readdirect(int);
void douser(Fs*, char*);
void dodir(Fs*);
int mail(Fs*, char*, char*, long);
int mailin(Fs*, char*, long, char*, char*);
void complain(char*, ...);
long readnumfile(char*);
void writenumfile(char*, long);
void
usage(void)
{
fprint(2, "usage: %s [-n] [-p]\n", argv0);
exits("usage");
}
void
main(int argc, char **argv)
{
int which;
which = 0;
ARGBEGIN{
case 'p':
which |= Plan9;
break;
case 'n':
which |= Securenet;
break;
case 'd':
debug++;
break;
default:
usage();
}ARGEND
argv0 = "warning";
if(!which)
which |= Plan9 | Securenet;
if(which & Plan9)
dodir(&fs[Plan9]);
if(which & Securenet)
dodir(&fs[Securenet]);
}
void
dodir(Fs *f)
{
int nfiles;
int i, fd;
if(chdir(f->keys) < 0){
complain("can't chdir to %s: %r", f->keys);
return;
}
fd = open(".", OREAD);
if(fd < 0){
complain("can't open %s: %r\n", f->keys);
return;
}
nfiles = dirreadall(fd, &dirbuf);
close(fd);
for(i = 0; i < nfiles; i++)
douser(f, dirbuf[i].name);
}
/*
* check for expiration
*/
void
douser(Fs *f, char *user)
{
int n, nwarn;
char buf[128];
long rcvrs, et, now;
char *l;
sprint(buf, "%s/expire", user);
et = readnumfile(buf);
now = time(0);
/* start warning 2 weeks ahead of time */
if(et <= now || et > now+14*24*60*60)
return;
sprint(buf, "%s/warnings", user);
nwarn = readnumfile(buf);
if(et <= now+14*24*60*60 && et > now+7*24*60*60){
/* one warning 2 weeks before expiration */
if(nwarn > 0)
return;
nwarn = 1;
} else {
/* one warning 1 week before expiration */
if(nwarn > 1)
return;
nwarn = 2;
}
/*
* if we can't open the who file, just mail to the user and hope
* for it makes it.
*/
if(f->b){
if(Bseek(f->b, 0, 0) < 0){
Bterm(f->b);
f->b = 0;
}
}
if(f->b == 0){
f->b = Bopen(f->who, OREAD);
if(f->b == 0){
if(mail(f, user, user, et) > 0)
writenumfile(buf, nwarn);
return;
}
}
/*
* look for matches in the who file and mail to every address on
* matching lines
*/
rcvrs = 0;
while(l = Brdline(f->b, '\n')){
n = strlen(user);
if(strncmp(l, user, n) == 0 && (l[n] == ' ' || l[n] == '\t'))
rcvrs += mailin(f, user, et, l, l+Blinelen(f->b));
}
/*
* if no matches, try the user directly
*/
if(rcvrs == 0)
rcvrs = mail(f, user, user, et);
rcvrs += mail(f, "netkeys", user, et);
if(rcvrs)
writenumfile(buf, nwarn);
}
/*
* anything in <>'s is an address
*/
int
mailin(Fs *f, char *user, long et, char *l, char *e)
{
int n;
int rcvrs;
char *p;
char addr[256];
p = 0;
rcvrs = 0;
while(l < e){
switch(*l){
case '<':
p = l + 1;
break;
case '>':
if(p == 0)
break;
n = l - p;
if(n > 0 && n <= sizeof(addr) - 2){
memmove(addr, p, n);
addr[n] = 0;
rcvrs += mail(f, addr, user, et);
}
p = 0;
break;
}
l++;
}
return rcvrs;
}
/*
* send mail
*/
int
mail(Fs *f, char *rcvr, char *user, long et)
{
int pid, i, fd;
int pfd[2];
char *ct, *p;
Waitmsg *w;
char buf[128];
if(pipe(pfd) < 0){
complain("out of pipes: %r");
return 0;
}
switch(pid = fork()){
case -1:
complain("can't fork: %r");
return 0;
case 0:
break;
default:
if(debug)
fprint(2, "started %d\n", pid);
close(pfd[0]);
ct = ctime(et);
p = strchr(ct, '\n');
*p = '.';
fprint(pfd[1], "User '%s's %s expires on %s\n", user, f->msg, ct);
if(f != fs)
fprint(pfd[1], "If you wish to renew contact your local administrator.\n");
p = strrchr(f->keys, '/');
if(p)
p++;
else
p = f->keys;
sprint(buf, "/adm/warn.%s", p);
fd = open(buf, OREAD);
if(fd >= 0){
while((i = read(fd, buf, sizeof(buf))) > 0)
write(pfd[1], buf, i);
close(fd);
}
close(pfd[1]);
/* wait for warning to be mailed */
for(;;){
w = wait();
if(w == nil)
break;
if(w->pid == pid){
if(debug)
fprint(2, "%d terminated: %s\n", pid, w->msg);
if(w->msg[0] == 0){
free(w);
break;
}else{
free(w);
return 0;
}
}else
free(w);
}
return 1;
}
/* get out of the current namespace */
newns("none", 0);
dup(pfd[0], 0);
close(pfd[0]);
close(pfd[1]);
putenv("upasname", "netkeys");
if(debug){
print("\nto %s\n", rcvr);
execl("/bin/cat", "cat", nil);
}
execl("/bin/upas/send", "send", "-r", rcvr, nil);
/* just in case */
sysfatal("can't exec send: %r");
return 0; /* for compiler */
}
void
complain(char *fmt, ...)
{
char buf[8192], *s;
va_list arg;
s = buf;
s += sprint(s, "%s: ", argv0);
va_start(arg, fmt);
s = vseprint(s, buf + sizeof(buf) / sizeof(*buf), fmt, arg);
va_end(arg);
*s++ = '\n';
write(2, buf, s - buf);
}
long
readnumfile(char *file)
{
int fd, n;
char buf[64];
fd = open(file, OREAD);
if(fd < 0){
complain("can't open %s: %r", file);
return 0;
}
n = read(fd, buf, sizeof(buf)-1);
close(fd);
if(n < 0){
complain("can't read %s: %r", file);
return 0;
}
buf[n] = 0;
return atol(buf);
}
void
writenumfile(char *file, long num)
{
int fd;
fd = open(file, OWRITE);
if(fd < 0){
complain("can't open %s: %r", file);
return;
}
fprint(fd, "%ld", num);
close(fd);
}