Commit | Line | Data |
---|---|---|
2117e02e MW |
1 | #include "fd.h" |
2 | #include "wait.h" | |
3 | #include "prot.h" | |
4 | #include "substdio.h" | |
5 | #include "stralloc.h" | |
6 | #include "scan.h" | |
7 | #include "exit.h" | |
8 | #include "fork.h" | |
9 | #include "error.h" | |
10 | #include "cdb.h" | |
11 | #include "case.h" | |
12 | #include "slurpclose.h" | |
13 | #include "auto_qmail.h" | |
14 | #include "auto_uids.h" | |
15 | #include "qlx.h" | |
16 | ||
17 | char *aliasempty; | |
18 | ||
19 | void initialize(argc,argv) | |
20 | int argc; | |
21 | char **argv; | |
22 | { | |
23 | aliasempty = argv[1]; | |
24 | if (!aliasempty) _exit(100); | |
25 | } | |
26 | ||
27 | int truncreport = 3000; | |
28 | ||
29 | void report(ss,wstat,s,len) | |
30 | substdio *ss; | |
31 | int wstat; | |
32 | char *s; | |
33 | int len; | |
34 | { | |
35 | int i; | |
36 | if (wait_crashed(wstat)) | |
37 | { substdio_puts(ss,"Zqmail-local crashed.\n"); return; } | |
38 | switch(wait_exitcode(wstat)) | |
39 | { | |
40 | case QLX_CDB: | |
41 | substdio_puts(ss,"ZTrouble reading users/cdb in qmail-lspawn.\n"); return; | |
42 | case QLX_NOMEM: | |
43 | substdio_puts(ss,"ZOut of memory in qmail-lspawn.\n"); return; | |
44 | case QLX_SYS: | |
45 | substdio_puts(ss,"ZTemporary failure in qmail-lspawn.\n"); return; | |
46 | case QLX_NOALIAS: | |
47 | substdio_puts(ss,"ZUnable to find alias user!\n"); return; | |
48 | case QLX_ROOT: | |
49 | substdio_puts(ss,"ZNot allowed to perform deliveries as root.\n"); return; | |
50 | case QLX_USAGE: | |
51 | substdio_puts(ss,"ZInternal qmail-lspawn bug.\n"); return; | |
52 | case QLX_NFS: | |
53 | substdio_puts(ss,"ZNFS failure in qmail-local.\n"); return; | |
54 | case QLX_EXECHARD: | |
55 | substdio_puts(ss,"DUnable to run qmail-local.\n"); return; | |
56 | case QLX_EXECSOFT: | |
57 | substdio_puts(ss,"ZUnable to run qmail-local.\n"); return; | |
58 | case QLX_EXECPW: | |
59 | substdio_puts(ss,"ZUnable to run qmail-getpw.\n"); return; | |
60 | case 111: case 71: case 74: case 75: | |
61 | substdio_put(ss,"Z",1); break; | |
62 | case 0: | |
63 | substdio_put(ss,"K",1); break; | |
64 | case 100: | |
65 | default: | |
66 | substdio_put(ss,"D",1); break; | |
67 | } | |
68 | ||
69 | for (i = 0;i < len;++i) if (!s[i]) break; | |
70 | substdio_put(ss,s,i); | |
71 | } | |
72 | ||
73 | stralloc lower = {0}; | |
74 | stralloc nughde = {0}; | |
75 | stralloc wildchars = {0}; | |
76 | ||
77 | void nughde_get(local) | |
78 | char *local; | |
79 | { | |
80 | char *(args[3]); | |
81 | int pi[2]; | |
82 | int gpwpid; | |
83 | int gpwstat; | |
84 | int r; | |
85 | int fd; | |
86 | int flagwild; | |
87 | ||
88 | if (!stralloc_copys(&lower,"!")) _exit(QLX_NOMEM); | |
89 | if (!stralloc_cats(&lower,local)) _exit(QLX_NOMEM); | |
90 | if (!stralloc_0(&lower)) _exit(QLX_NOMEM); | |
91 | case_lowerb(lower.s,lower.len); | |
92 | ||
93 | if (!stralloc_copys(&nughde,"")) _exit(QLX_NOMEM); | |
94 | ||
95 | fd = open_read("users/cdb"); | |
96 | if (fd == -1) | |
97 | if (errno != error_noent) | |
98 | _exit(QLX_CDB); | |
99 | ||
100 | if (fd != -1) | |
101 | { | |
102 | uint32 dlen; | |
103 | unsigned int i; | |
104 | ||
105 | r = cdb_seek(fd,"",0,&dlen); | |
106 | if (r != 1) _exit(QLX_CDB); | |
107 | if (!stralloc_ready(&wildchars,(unsigned int) dlen)) _exit(QLX_NOMEM); | |
108 | wildchars.len = dlen; | |
109 | if (cdb_bread(fd,wildchars.s,wildchars.len) == -1) _exit(QLX_CDB); | |
110 | ||
111 | i = lower.len; | |
112 | flagwild = 0; | |
113 | ||
114 | do | |
115 | { | |
116 | /* i > 0 */ | |
117 | if (!flagwild || (i == 1) || (byte_chr(wildchars.s,wildchars.len,lower.s[i - 1]) < wildchars.len)) | |
118 | { | |
119 | r = cdb_seek(fd,lower.s,i,&dlen); | |
120 | if (r == -1) _exit(QLX_CDB); | |
121 | if (r == 1) | |
122 | { | |
123 | if (!stralloc_ready(&nughde,(unsigned int) dlen)) _exit(QLX_NOMEM); | |
124 | nughde.len = dlen; | |
125 | if (cdb_bread(fd,nughde.s,nughde.len) == -1) _exit(QLX_CDB); | |
126 | if (flagwild) | |
127 | if (!stralloc_cats(&nughde,local + i - 1)) _exit(QLX_NOMEM); | |
128 | if (!stralloc_0(&nughde)) _exit(QLX_NOMEM); | |
129 | close(fd); | |
130 | return; | |
131 | } | |
132 | } | |
133 | --i; | |
134 | flagwild = 1; | |
135 | } | |
136 | while (i); | |
137 | ||
138 | close(fd); | |
139 | } | |
140 | ||
141 | if (pipe(pi) == -1) _exit(QLX_SYS); | |
142 | args[0] = "bin/qmail-getpw"; | |
143 | args[1] = local; | |
144 | args[2] = 0; | |
145 | switch(gpwpid = vfork()) | |
146 | { | |
147 | case -1: | |
148 | _exit(QLX_SYS); | |
149 | case 0: | |
150 | if (prot_gid(auto_gidn) == -1) _exit(QLX_USAGE); | |
151 | if (prot_uid(auto_uidp) == -1) _exit(QLX_USAGE); | |
152 | close(pi[0]); | |
153 | if (fd_move(1,pi[1]) == -1) _exit(QLX_SYS); | |
154 | execv(*args,args); | |
155 | _exit(QLX_EXECPW); | |
156 | } | |
157 | close(pi[1]); | |
158 | ||
159 | if (slurpclose(pi[0],&nughde,128) == -1) _exit(QLX_SYS); | |
160 | ||
161 | if (wait_pid(&gpwstat,gpwpid) != -1) | |
162 | { | |
163 | if (wait_crashed(gpwstat)) _exit(QLX_SYS); | |
164 | if (wait_exitcode(gpwstat) != 0) _exit(wait_exitcode(gpwstat)); | |
165 | } | |
166 | } | |
167 | ||
168 | int spawn(fdmess,fdout,s,r,at) | |
169 | int fdmess; int fdout; | |
170 | char *s; char *r; int at; | |
171 | { | |
172 | int f; | |
173 | ||
174 | if (!(f = fork())) | |
175 | { | |
176 | char *(args[11]); | |
177 | unsigned long u; | |
178 | int n; | |
179 | int uid; | |
180 | int gid; | |
181 | char *x; | |
182 | unsigned int xlen; | |
183 | ||
184 | r[at] = 0; | |
185 | if (!r[0]) _exit(0); /* <> */ | |
186 | ||
187 | if (chdir(auto_qmail) == -1) _exit(QLX_USAGE); | |
188 | ||
189 | nughde_get(r); | |
190 | ||
191 | x = nughde.s; | |
192 | xlen = nughde.len; | |
193 | ||
194 | args[0] = "bin/qmail-local"; | |
195 | args[1] = "--"; | |
196 | args[2] = x; | |
197 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
198 | ||
199 | scan_ulong(x,&u); | |
200 | uid = u; | |
201 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
202 | ||
203 | scan_ulong(x,&u); | |
204 | gid = u; | |
205 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
206 | ||
207 | args[3] = x; | |
208 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
209 | ||
210 | args[4] = r; | |
211 | args[5] = x; | |
212 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
213 | ||
214 | args[6] = x; | |
215 | n = byte_chr(x,xlen,0); if (n++ == xlen) _exit(QLX_USAGE); x += n; xlen -= n; | |
216 | ||
217 | args[7] = r + at + 1; | |
218 | args[8] = s; | |
219 | args[9] = aliasempty; | |
220 | args[10] = 0; | |
221 | ||
222 | if (fd_move(0,fdmess) == -1) _exit(QLX_SYS); | |
223 | if (fd_move(1,fdout) == -1) _exit(QLX_SYS); | |
224 | if (fd_copy(2,1) == -1) _exit(QLX_SYS); | |
225 | if (prot_gid(gid) == -1) _exit(QLX_USAGE); | |
226 | if (prot_uid(uid) == -1) _exit(QLX_USAGE); | |
227 | if (!getuid()) _exit(QLX_ROOT); | |
228 | ||
229 | execv(*args,args); | |
230 | if (error_temp(errno)) _exit(QLX_EXECSOFT); | |
231 | _exit(QLX_EXECHARD); | |
232 | } | |
233 | return f; | |
234 | } |