masqmail
view src/readsock.c @ 281:ea5f86e0a81c
modes are now enforced exclusive
Other MTAs (exim, postfix) are more relaxing, but as combinations
of exclusive modes are senseless we behave more obvious if we
fail early. This makes understanding the behavior easier too.
| author | markus schnalke <meillo@marmaro.de> |
|---|---|
| date | Tue, 07 Dec 2010 14:04:56 -0300 |
| parents | f671821d8222 |
| children | 41958685480d |
line source
1 /* MasqMail
2 Copyright (C) 2000 Oliver Kurth
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
19 #include <signal.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <setjmp.h>
23 #include <unistd.h>
24 #include <ctype.h>
26 #include "readsock.h"
27 /*#include "masqmail.h"*/
29 jmp_buf jmp_timeout;
31 static void
32 sig_timeout_handler(int sig)
33 {
34 longjmp(jmp_timeout, 1);
35 }
37 static struct sigaction old_sa_alrm;
39 static void
40 alarm_on(int timeout)
41 {
42 struct sigaction sa;
44 sa.sa_handler = sig_timeout_handler;
45 sigemptyset(&(sa.sa_mask));
46 sa.sa_flags = 0;
47 sigaction(SIGALRM, &sa, &old_sa_alrm);
49 if (timeout > 0)
50 alarm(timeout);
51 }
53 static void
54 alarm_off()
55 {
56 alarm(0);
58 sigaction(SIGALRM, &old_sa_alrm, NULL);
59 }
61 static void
62 _read_chug(FILE * in)
63 {
64 int c = 0;
66 c = fgetc(in);
67 while (isspace(c) && (c != EOF))
68 c = fgetc(in);
69 ungetc(c, in);
70 }
72 static int
73 _read_line(FILE * in, char *buf, int buf_len, int timeout)
74 {
75 int p = 0;
76 int c = 0;
78 c = fgetc(in);
79 while ((c != '\n') && (c != EOF) && (p < buf_len - 1)) {
80 buf[p++] = c;
81 c = fgetc(in);
82 }
84 buf[p] = '\0';
86 if (c == EOF)
87 return -1;
88 else if (p >= buf_len) {
89 ungetc(c, in);
90 return -2;
91 }
93 buf[p++] = c; /* \n */
94 buf[p] = '\0';
96 return p;
97 }
99 int
100 read_sockline(FILE * in, char *buf, int buf_len, int timeout, unsigned int flags)
101 {
102 int p = 0;
104 if (setjmp(jmp_timeout) != 0) {
105 alarm_off();
106 return -3;
107 }
109 alarm_on(timeout);
111 /* strip leading spaces */
112 if (flags & READSOCKL_CHUG) {
113 _read_chug(in);
114 }
116 p = _read_line(in, buf, buf_len, timeout);
118 alarm_off();
120 if (p > 1) {
121 /* here we are sure that buf[p-1] == '\n' */
122 if (flags & READSOCKL_CVT_CRLF) {
123 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
124 buf[p - 2] = '\n';
125 buf[p - 1] = 0;
126 p--;
127 }
128 }
129 }
130 return p;
131 }
133 int
134 read_sockline1(FILE * in, char **pbuf, int *buf_len, int timeout, unsigned int flags)
135 {
136 int p = 0, size = *buf_len;
137 char *buf;
139 if (setjmp(jmp_timeout) != 0) {
140 alarm_off();
141 return -3;
142 }
144 alarm_on(timeout);
146 /* strip leading spaces */
147 if (flags & READSOCKL_CHUG) {
148 _read_chug(in);
149 }
151 if (!*pbuf)
152 *pbuf = g_malloc(size);
153 buf = *pbuf;
155 while (1) {
156 int pp;
158 pp = _read_line(in, buf, size, timeout);
159 if (pp == -2) {
160 *pbuf = realloc(*pbuf, *buf_len + size);
161 buf = *pbuf + *buf_len;
162 *buf_len += size;
163 p += size;
164 } else {
165 if (pp > 0)
166 p += pp;
167 else
168 p = pp;
169 break;
170 }
171 }
173 alarm_off();
175 if (p > 1) {
176 buf = *pbuf;
177 /* here we are sure that buf[p-1] == '\n' */
178 if (flags & READSOCKL_CVT_CRLF) {
179 if ((buf[p - 2] == '\r') && (buf[p - 1] == '\n')) {
180 buf[p - 2] = '\n';
181 buf[p - 1] = '\0';
182 p--;
183 }
184 }
185 }
186 return p;
187 }