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#include <unistd.h>
#include "buffer.h"
#include "byte.h"
#include "case.h"
#include "cdbread.h"
#include "error.h"
#include "exit.h"
#include "fd.h"
#include "open.h"
#include "prot.h"
#include "readclose.h"
#include "scan.h"
#include "stralloc.h"
#include "wait.h"
#include "qlx.h"
#include "spawn.h"
#ifdef USE_CONFIG
#include "fehsqm-config.h"
#else
#include "auto_qmail.h"
#include "auto_uids.h"
#endif
char *aliasempty;
void initialize(int argc, char **argv)
{
aliasempty = argv[1];
if (!aliasempty) _exit(100);
}
int truncreport = 3000;
void report(buffer *log, int wstat, char *s, int len)
{
int i;
if (wait_crashed(wstat)) {
buffer_putsflush(log, "Zqmail-lspawn: qmail-local crashed.\n");
return;
}
switch (wait_exitcode(wstat)) {
case QLX_CDB: buffer_putsflush(log, "Zqmail-lspawn: Trouble reading users/assign.cdb.\n"); return;
case QLX_NOMEM: buffer_putsflush(log, "Zqmail-lspawn: Out of memory.\n"); return;
case QLX_SYS: buffer_putsflush(log, "Zqmail-lspawn: Temporary failure.\n"); return;
case QLX_NOALIAS: buffer_putsflush(log, "Zqmail-lspawn: Unable to find alias user!\n"); return;
case QLX_ROOT:
buffer_putsflush(log, "Zqmail-spawn: Not allowed to perform deliveries as root.\n");
return;
case QLX_USAGE: buffer_putsflush(log, "Zqmail-spawn: Internal bug.\n"); return;
case QLX_NFS: buffer_putsflush(log, "Zqmail-spawn: NFS failure in qmail-local.\n"); return;
case QLX_EXECHARD: buffer_putsflush(log, "Dqmail-spawn: Unable to run qmail-local.\n"); return;
case QLX_EXECSOFT: buffer_putsflush(log, "Zqmail-spawn: Unable to run qmail-local.\n"); return;
case QLX_EXECPW: buffer_putsflush(log, "Zqmail-spawn: Unable to run qmail-getpw.\n"); return;
case 111:
case 71:
case 74:
case 75: buffer_put(log, "Z", 1); break;
case 0: buffer_put(log, "K", 1); break;
case 100:
default: buffer_put(log, "D", 1); break;
}
for (i = 0; i < len; ++i)
if (!s[i]) break;
buffer_put(log, s, i);
}
stralloc lower = {0};
stralloc nughde = {0};
stralloc wildchars = {0};
static struct cdb c;
static void nughde_get(char *local)
{
char *(args[3]);
int pi[2];
int gpwpid;
int gpwstat;
int r;
int fd;
int flagwild;
if (!stralloc_copys(&lower, "!")) _exit(QLX_NOMEM);
if (!stralloc_cats(&lower, local)) _exit(QLX_NOMEM);
if (!stralloc_0(&lower)) _exit(QLX_NOMEM);
case_lowerb(lower.s, lower.len);
if (!stralloc_copys(&nughde, "")) _exit(QLX_NOMEM);
fd = open_read("users/assign.cdb");
if (fd == -1)
if (errno != ENOENT) _exit(QLX_CDB);
if (fd != -1) {
unsigned int i;
cdb_init(&c, fd);
r = cdb_find(&c, "", 0);
if (r != 1) _exit(QLX_CDB);
if (!stralloc_ready(&wildchars, cdb_datalen(&c))) _exit(QLX_NOMEM);
wildchars.len = cdb_datalen(&c);
if (cdb_read(&c, wildchars.s, wildchars.len, cdb_datapos(&c)) == -1) _exit(QLX_CDB);
i = lower.len;
flagwild = 0;
do {
/* i > 0 */
if (!flagwild || (i == 1)
|| (byte_chr(wildchars.s, wildchars.len, lower.s[i - 1]) < wildchars.len))
{
r = cdb_find(&c, lower.s, i);
if (r == -1) _exit(QLX_CDB);
if (r == 1) {
if (!stralloc_ready(&nughde, cdb_datalen(&c))) _exit(QLX_NOMEM);
nughde.len = cdb_datalen(&c);
if (cdb_read(&c, nughde.s, nughde.len, cdb_datapos(&c)) == -1) _exit(QLX_CDB);
if (flagwild)
if (!stralloc_cats(&nughde, local + i - 1)) _exit(QLX_NOMEM);
if (!stralloc_0(&nughde)) _exit(QLX_NOMEM);
close(fd);
return;
}
}
--i;
flagwild = 1;
} while (i);
close(fd);
}
if (pipe(pi) == -1) _exit(QLX_SYS);
args[0] = "bin/qmail-getpw";
args[1] = local;
args[2] = 0;
switch (gpwpid = fork()) {
case -1: _exit(QLX_SYS);
case 0:
if (prot_gid(auto_gidn) == -1) _exit(QLX_USAGE);
if (prot_uid(auto_uidp) == -1) _exit(QLX_USAGE);
close(pi[0]);
if (fd_move(1, pi[1]) == -1) _exit(QLX_SYS);
execv(*args, args);
_exit(QLX_EXECPW);
}
close(pi[1]);
if (readclose_append(pi[0], &nughde, 128) == -1) _exit(QLX_SYS);
if (wait_pid(&gpwstat, gpwpid) != -1) {
if (wait_crashed(gpwstat)) _exit(QLX_SYS);
if (wait_exitcode(gpwstat) != 0) _exit(wait_exitcode(gpwstat));
}
}
int spawn(int fdmess, int fdout, const char *s, char *r, const int at)
{
int f;
if (!(f = fork())) {
char *(args[11]);
unsigned long u;
int n;
int uid;
int gid;
char *x;
unsigned int xlen;
r[at] = 0;
if (!r[0]) _exit(0); /* <> */
if (chdir(auto_qmail) == -1) _exit(QLX_USAGE);
nughde_get(r);
x = nughde.s;
xlen = nughde.len;
args[0] = "bin/qmail-local";
args[1] = "--";
args[2] = x;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
scan_ulong(x, &u);
uid = u;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
scan_ulong(x, &u);
gid = u;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
args[3] = x;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
args[4] = r;
args[5] = x;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
args[6] = x;
n = byte_chr(x, xlen, 0);
if (n++ == xlen) _exit(QLX_USAGE);
x += n;
xlen -= n;
args[7] = r + at + 1;
args[8] = s;
args[9] = aliasempty;
args[10] = 0;
if (fd_move(0, fdmess) == -1) _exit(QLX_SYS);
if (fd_move(1, fdout) == -1) _exit(QLX_SYS);
if (fd_copy(2, 1) == -1) _exit(QLX_SYS);
if (prot_gid(gid) == -1) _exit(QLX_USAGE);
if (prot_uid(uid) == -1) _exit(QLX_USAGE);
if (!getuid()) _exit(QLX_ROOT);
execv(*args, args);
if (errno) _exit(QLX_EXECSOFT);
_exit(QLX_EXECHARD);
}
return f;
}
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