Commit | Line | Data |
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f8beb284 MW |
1 | /*$Id: subscribe.c,v 1.5 1999/10/12 23:38:36 lindberg Exp $*/ |
2 | /*$Name: ezmlm-idx-040 $*/ | |
3 | #include "stralloc.h" | |
4 | #include "getln.h" | |
5 | #include "readwrite.h" | |
6 | #include "substdio.h" | |
7 | #include "strerr.h" | |
8 | #include "open.h" | |
9 | #include "byte.h" | |
10 | #include "case.h" | |
11 | #include "lock.h" | |
12 | #include "error.h" | |
13 | #include "subscribe.h" | |
14 | #include "uint32.h" | |
15 | #include "fmt.h" | |
16 | #include "errtxt.h" | |
17 | #include "log.h" | |
18 | #include "idx.h" | |
19 | ||
20 | static void die_nomem(fatal) | |
21 | char *fatal; | |
22 | { | |
23 | strerr_die2x(111,fatal,ERR_NOMEM); | |
24 | } | |
25 | ||
26 | static stralloc addr = {0}; | |
27 | static stralloc lcaddr = {0}; | |
28 | static stralloc line = {0}; | |
29 | static stralloc domain = {0}; | |
30 | static stralloc logline = {0}; | |
31 | static stralloc quoted = {0}; | |
32 | static stralloc fnnew = {0}; | |
33 | static stralloc fn = {0}; | |
34 | static stralloc fnlock = {0}; | |
35 | static char szh[FMT_ULONG]; | |
36 | ||
37 | void die_read(fatal) | |
38 | char *fatal; | |
39 | { | |
40 | strerr_die4sys(111,fatal,ERR_READ,fn.s,": "); | |
41 | } | |
42 | ||
43 | void die_write(fatal) | |
44 | char *fatal; | |
45 | { | |
46 | strerr_die4sys(111,fatal,ERR_WRITE,fnnew.s,": "); | |
47 | } | |
48 | ||
49 | static int fd; | |
50 | static substdio ss; | |
51 | static char ssbuf[256]; | |
52 | static int fdnew; | |
53 | static substdio ssnew; | |
54 | static char ssnewbuf[256]; | |
55 | ||
56 | int subscribe(dbname,userhost,flagadd,comment,event,flagmysql, | |
57 | forcehash,tab,fatal) | |
58 | /* add (flagadd=1) or remove (flagadd=0) userhost from the subscr. database */ | |
59 | /* dbname. Comment is e.g. the subscriber from line or name. It is added to */ | |
60 | /* the log. Event is the action type, e.g. "probe", "manual", etc. The */ | |
61 | /* direction (sub/unsub) is inferred from flagadd. Returns 1 on success, 0 */ | |
62 | /* on failure. If flagmysql is set and the file "sql" is found in the */ | |
63 | /* directory dbname, it is parsed and a mysql db is assumed. if forcehash is */ | |
64 | /* >=0 it is used in place of the calculated hash. This makes it possible to */ | |
65 | /* add addresses with a hash that does not exist. forcehash has to be 0..99. */ | |
66 | /* for unsubscribes, the address is only removed if forcehash matches the */ | |
67 | /* actual hash. This way, ezmlm-manage can be prevented from touching certain*/ | |
68 | /* addresses that can only be removed by ezmlm-unsub. Usually, this would be */ | |
69 | /* used for sublist addresses (to avoid removal) and sublist aliases (to */ | |
70 | /* prevent users from subscribing them (although the cookie mechanism would */ | |
71 | /* prevent the resulting duplicate message from being distributed. */ | |
72 | ||
73 | char *dbname; | |
74 | char *userhost; | |
75 | int flagadd; | |
76 | char *comment; | |
77 | char *event; | |
78 | int flagmysql; | |
79 | int forcehash; | |
80 | char *tab; | |
81 | char *fatal; | |
82 | { | |
83 | int fdlock; | |
84 | ||
85 | char szhash[3] = "00"; | |
86 | ||
87 | unsigned int j; | |
88 | uint32 h,lch; | |
89 | unsigned char ch,lcch; | |
90 | int match; | |
91 | int flagwasthere; | |
92 | ||
93 | if (userhost[str_chr(userhost,'\n')]) | |
94 | strerr_die2x(100,fatal,ERR_ADDR_NL); | |
95 | ||
96 | if (!stralloc_copys(&addr,"T")) die_nomem(fatal); | |
97 | if (!stralloc_cats(&addr,userhost)) die_nomem(fatal); | |
98 | if (addr.len > 401) | |
99 | strerr_die2x(100,fatal,ERR_ADDR_LONG); | |
100 | ||
101 | j = byte_rchr(addr.s,addr.len,'@'); | |
102 | if (j == addr.len) | |
103 | strerr_die2x(100,fatal,ERR_ADDR_AT); | |
104 | case_lowerb(addr.s + j + 1,addr.len - j - 1); | |
105 | if (!stralloc_copy(&lcaddr,&addr)) die_nomem(fatal); | |
106 | case_lowerb(lcaddr.s + 1,j - 1); /* make all-lc version of address */ | |
107 | ||
108 | if (forcehash >= 0 && forcehash <= 52) { | |
109 | ch = lcch = (unsigned char) forcehash; | |
110 | } else { | |
111 | h = 5381; | |
112 | lch = h; | |
113 | for (j = 0;j < addr.len;++j) { | |
114 | h = (h + (h << 5)) ^ (uint32) (unsigned char) addr.s[j]; | |
115 | lch = (lch + (lch << 5)) ^ (uint32) (unsigned char) lcaddr.s[j]; | |
116 | } | |
117 | lcch = 64 + (lch % 53); | |
118 | ch = 64 + (h % 53); | |
119 | } | |
120 | ||
121 | if (!stralloc_0(&addr)) die_nomem(fatal); | |
122 | if (!stralloc_0(&lcaddr)) die_nomem(fatal); | |
123 | if (!stralloc_copys(&fn,dbname)) die_nomem(fatal); | |
124 | if (!stralloc_copys(&fnlock,dbname)) die_nomem(fatal); | |
125 | ||
126 | if (!stralloc_cats(&fn,"/subscribers/")) die_nomem(fatal); | |
127 | if (!stralloc_catb(&fn,&lcch,1)) die_nomem(fatal); | |
128 | if (!stralloc_copy(&fnnew,&fn)) die_nomem(fatal); | |
129 | /* code later depends on fnnew = fn + 'n' */ | |
130 | if (!stralloc_cats(&fnnew,"n")) die_nomem(fatal); | |
131 | if (!stralloc_cats(&fnlock,"/lock")) die_nomem(fatal); | |
132 | if (!stralloc_0(&fnnew)) die_nomem(fatal); | |
133 | if (!stralloc_0(&fn)) die_nomem(fatal); | |
134 | if (!stralloc_0(&fnlock)) die_nomem(fatal); | |
135 | ||
136 | fdlock = open_append(fnlock.s); | |
137 | if (fdlock == -1) | |
138 | strerr_die4sys(111,fatal,ERR_OPEN,fnlock.s,": "); | |
139 | if (lock_ex(fdlock) == -1) | |
140 | strerr_die4sys(111,fatal,ERR_OBTAIN,fnlock.s,": "); | |
141 | ||
142 | /* do lower case hashed version first */ | |
143 | fdnew = open_trunc(fnnew.s); | |
144 | if (fdnew == -1) die_write(fatal); | |
145 | substdio_fdbuf(&ssnew,write,fdnew,ssnewbuf,sizeof(ssnewbuf)); | |
146 | ||
147 | flagwasthere = 0; | |
148 | ||
149 | fd = open_read(fn.s); | |
150 | if (fd == -1) { | |
151 | if (errno != error_noent) { close(fdnew); die_read(fatal); } | |
152 | } | |
153 | else { | |
154 | substdio_fdbuf(&ss,read,fd,ssbuf,sizeof(ssbuf)); | |
155 | ||
156 | for (;;) { | |
157 | if (getln(&ss,&line,&match,'\0') == -1) { | |
158 | close(fd); close(fdnew); die_read(fatal); | |
159 | } | |
160 | if (!match) break; | |
161 | if (line.len == addr.len) | |
162 | if (!case_diffb(line.s,line.len,addr.s)) { | |
163 | flagwasthere = 1; | |
164 | if (!flagadd) | |
165 | continue; | |
166 | } | |
167 | if (substdio_bput(&ssnew,line.s,line.len) == -1) { | |
168 | close(fd); close(fdnew); die_write(fatal); | |
169 | } | |
170 | } | |
171 | ||
172 | close(fd); | |
173 | } | |
174 | ||
175 | if (flagadd && !flagwasthere) | |
176 | if (substdio_bput(&ssnew,addr.s,addr.len) == -1) { | |
177 | close(fdnew); die_write(fatal); | |
178 | } | |
179 | ||
180 | if (substdio_flush(&ssnew) == -1) { close(fdnew); die_write(fatal); } | |
181 | if (fsync(fdnew) == -1) { close(fdnew); die_write(fatal); } | |
182 | close(fdnew); | |
183 | ||
184 | if (rename(fnnew.s,fn.s) == -1) | |
185 | strerr_die6sys(111,fatal,ERR_MOVE,fnnew.s," to ",fn.s,": "); | |
186 | ||
187 | if ((ch == lcch) || flagwasthere) { | |
188 | close(fdlock); | |
189 | if (flagadd ^ flagwasthere) { | |
190 | if (!stralloc_0(&addr)) die_nomem(fatal); | |
191 | log(dbname,event,addr.s+1,comment); | |
192 | return 1; | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | ||
197 | /* If unsub and not found and hashed differ, OR */ | |
198 | /* sub and not found (so added with new hash) */ | |
199 | /* do the 'case-dependent' hash */ | |
200 | ||
201 | fn.s[fn.len - 2] = ch; | |
202 | fnnew.s[fnnew.len - 3] = ch; | |
203 | fdnew = open_trunc(fnnew.s); | |
204 | if (fdnew == -1) die_write(fatal); | |
205 | substdio_fdbuf(&ssnew,write,fdnew,ssnewbuf,sizeof(ssnewbuf)); | |
206 | ||
207 | fd = open_read(fn.s); | |
208 | if (fd == -1) { | |
209 | if (errno != error_noent) { close(fdnew); die_read(fatal); } | |
210 | } else { | |
211 | substdio_fdbuf(&ss,read,fd,ssbuf,sizeof(ssbuf)); | |
212 | ||
213 | for (;;) { | |
214 | if (getln(&ss,&line,&match,'\0') == -1) | |
215 | { close(fd); close(fdnew); die_read(fatal); } | |
216 | if (!match) break; | |
217 | if (line.len == addr.len) | |
218 | if (!case_diffb(line.s,line.len,addr.s)) { | |
219 | flagwasthere = 1; | |
220 | continue; /* always want to remove from case-sensitive hash */ | |
221 | } | |
222 | if (substdio_bput(&ssnew,line.s,line.len) == -1) | |
223 | { close(fd); close(fdnew); die_write(fatal); } | |
224 | } | |
225 | ||
226 | close(fd); | |
227 | } | |
228 | ||
229 | if (substdio_flush(&ssnew) == -1) { close(fdnew); die_write(fatal); } | |
230 | if (fsync(fdnew) == -1) { close(fdnew); die_write(fatal); } | |
231 | close(fdnew); | |
232 | ||
233 | if (rename(fnnew.s,fn.s) == -1) | |
234 | strerr_die6sys(111,fatal,ERR_MOVE,fnnew.s," to ",fn.s,": "); | |
235 | ||
236 | close(fdlock); | |
237 | if (flagadd ^ flagwasthere) { | |
238 | if (!stralloc_0(&addr)) die_nomem(fatal); | |
239 | log(dbname,event,addr.s+1,comment); | |
240 | return 1; | |
241 | } | |
242 | return 0; | |
243 | ||
244 | } |