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- #include "fd.h"
- #include "wait.h"
- #include "prot.h"
- #include "substdio.h"
- #include "stralloc.h"
- #include "scan.h"
- #include "exit.h"
- #include "fork.h"
- #include "error.h"
- #include "cdb.h"
- #include "case.h"
- #include "slurpclose.h"
- #include "auto_qmail.h"
- #include "auto_uids.h"
- #include "qlx.h"
-
- char *aliasempty;
-
- void initialize(argc,argv)
- int argc;
- char **argv;
- {
- aliasempty = argv[1];
- if (!aliasempty) _exit(100);
- }
-
- int truncreport = 3000;
-
- void report(ss,wstat,s,len)
- substdio *ss;
- int wstat;
- char *s;
- int len;
- {
- int i;
- if (wait_crashed(wstat))
- { substdio_puts(ss,"Zqmail-local crashed.\n"); return; }
- switch(wait_exitcode(wstat))
- {
- case QLX_CDB:
- substdio_puts(ss,"ZTrouble reading users/cdb in qmail-lspawn.\n"); return;
- case QLX_NOMEM:
- substdio_puts(ss,"ZOut of memory in qmail-lspawn.\n"); return;
- case QLX_SYS:
- substdio_puts(ss,"ZTemporary failure in qmail-lspawn.\n"); return;
- case QLX_NOALIAS:
- substdio_puts(ss,"ZUnable to find alias user!\n"); return;
- case QLX_ROOT:
- substdio_puts(ss,"ZNot allowed to perform deliveries as root.\n"); return;
- case QLX_USAGE:
- substdio_puts(ss,"ZInternal qmail-lspawn bug.\n"); return;
- case QLX_NFS:
- substdio_puts(ss,"ZNFS failure in qmail-local.\n"); return;
- case QLX_EXECHARD:
- substdio_puts(ss,"DUnable to run qmail-local.\n"); return;
- case QLX_EXECSOFT:
- substdio_puts(ss,"ZUnable to run qmail-local.\n"); return;
- case QLX_EXECPW:
- substdio_puts(ss,"ZUnable to run qmail-getpw.\n"); return;
- case 111: case 71: case 74: case 75:
- substdio_put(ss,"Z",1); break;
- case 0:
- substdio_put(ss,"K",1); break;
- case 100:
- default:
- substdio_put(ss,"D",1); break;
- }
-
- for (i = 0;i < len;++i) if (!s[i]) break;
- substdio_put(ss,s,i);
- }
-
- stralloc lower = {0};
- stralloc nughde = {0};
- stralloc wildchars = {0};
-
- void nughde_get(local)
- 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/cdb");
- if (fd == -1)
- if (errno != error_noent)
- _exit(QLX_CDB);
-
- if (fd != -1)
- {
- uint32 dlen;
- unsigned int i;
-
- r = cdb_seek(fd,"",0,&dlen);
- if (r != 1) _exit(QLX_CDB);
- if (!stralloc_ready(&wildchars,(unsigned int) dlen)) _exit(QLX_NOMEM);
- wildchars.len = dlen;
- if (cdb_bread(fd,wildchars.s,wildchars.len) == -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_seek(fd,lower.s,i,&dlen);
- if (r == -1) _exit(QLX_CDB);
- if (r == 1)
- {
- if (!stralloc_ready(&nughde,(unsigned int) dlen)) _exit(QLX_NOMEM);
- nughde.len = dlen;
- if (cdb_bread(fd,nughde.s,nughde.len) == -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 = vfork())
- {
- 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 (slurpclose(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(fdmess,fdout,s,r,at)
- int fdmess; int fdout;
- char *s; char *r; 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 (error_temp(errno)) _exit(QLX_EXECSOFT);
- _exit(QLX_EXECHARD);
- }
- return f;
- }
-