1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* env.c -- small service routines
*
* For license terms, see the file COPYING in this directory.
*/
#include "config.h"
#include <stdio.h>
#include <ctype.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <pwd.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_GETHOSTBYNAME
#include <netdb.h>
#endif /* HAVE_GETHOSTBYNAME */
#ifndef HAVE_STRFTIME /* For ctime prototype */
#include <sys/types.h>
#include <time.h>
#endif
#include "fetchmail.h"
extern char *getenv(); /* needed on sysV68 R3V7.1. */
extern char *program_name;
void envquery(int argc, char **argv)
/* set up basic stuff from the environment (including the rc file name) */
{
struct passwd *pw;
if ((program_name = strrchr(argv[0], '/')) != NULL)
++program_name;
else
program_name = argv[0];
if ((user = getenv("USER")) == (char *)NULL)
user = getenv("LOGNAME");
if ((user == (char *)NULL) || (home = getenv("HOME")) == (char *)NULL)
{
if ((pw = getpwuid(getuid())) != NULL)
{
user = pw->pw_name;
home = pw->pw_dir;
}
else
{
fprintf(stderr,
"%s: can't find your name and home directory!\n",
program_name);
exit(PS_UNDEFINED);
}
}
#define RCFILE_NAME ".fetchmailrc"
rcfile = (char *) xmalloc(strlen(home)+strlen(RCFILE_NAME)+2);
/* avoid //.fetchmailrc */
if (strcmp(home, "/") != 0) {
strcpy(rcfile, home);
} else {
*rcfile = '\0';
}
strcat(rcfile, "/");
strcat(rcfile, RCFILE_NAME);
}
char *host_fqdn(void)
/* get the FQDN of the machine we're running */
{
char tmpbuf[HOSTLEN+1];
if (gethostname(tmpbuf, sizeof(tmpbuf)))
{
fprintf(stderr, "%s: can't determine your host!",
program_name);
exit(PS_DNS);
}
#ifdef HAVE_GETHOSTBYNAME
/* if we got a . in the hostname assume it is a FQDN */
if (strchr(tmpbuf, '.') == NULL)
{
struct hostent *hp;
/* if we got a basename (as we do in Linux) make a FQDN of it */
hp = gethostbyname(tmpbuf);
if (hp == (struct hostent *) NULL)
{
/* exit with error message */
fprintf(stderr,
"gethostbyname failed for %s\n", tmpbuf);
exit(PS_DNS);
}
return(xstrdup(hp->h_name));
}
else
#endif /* HAVE_GETHOSTBYNAME */
return(xstrdup(tmpbuf));
}
char *rfc822timestamp(void)
/* return a timestamp in RFC822 form */
{
time_t now;
static char buf[40];
time(&now);
#ifdef HAVE_STRFTIME
/*
* Conform to RFC822. This is typically going to emit
* a three-letter timezone for %Z, which is going to
* be marked "obsolete syntax" in 822bis. Note that we
* generate a 4-digit year here, avoiding Y2K hassles.
* Note: max length of this timestamp in an English locale
* should be 29 chars, assuming a 3-character timezone.
*/
strftime(buf, sizeof(buf)-1,
"%a, %d %b %Y %H:%M:%S %Z", localtime(&now));
#else
/*
* This is really just a portability fallback, as the
* date format ctime(3) emits is not RFC822
* conformant.
*/
strcpy(buf, ctime(&now));
buf[strlen(buf)-1] = '\0'; /* remove trailing \n */
#endif /* HAVE_STRFTIME */
return(buf);
}
const char *showproto(int proto)
/* protocol index to protocol name mapping */
{
switch (proto)
{
case P_AUTO: return("auto"); break;
#ifdef POP2_ENABLE
case P_POP2: return("POP2"); break;
#endif /* POP2_ENABLE */
case P_POP3: return("POP3"); break;
case P_IMAP: return("IMAP"); break;
case P_IMAP_K4: return("IMAP-K4"); break;
#ifdef GSSAPI
case P_IMAP_GSS: return("IMAP-GSS"); break;
#endif /* GSSAPI */
case P_APOP: return("APOP"); break;
case P_RPOP: return("RPOP"); break;
case P_ETRN: return("ETRN"); break;
default: return("unknown?!?"); break;
}
}
char *visbuf(const char *buf)
/* visibilize a given string */
{
static char vbuf[BUFSIZ];
char *tp = vbuf;
while (*buf)
{
if (*buf == '"')
{
*tp++ = '\\'; *tp++ = '"';
buf++;
}
else if (isprint(*buf) || *buf == ' ')
*tp++ = *buf++;
else if (*buf == '\n')
{
*tp++ = '\\'; *tp++ = 'n';
buf++;
}
else if (*buf == '\r')
{
*tp++ = '\\'; *tp++ = 'r';
buf++;
}
else if (*buf == '\b')
{
*tp++ = '\\'; *tp++ = 'b';
buf++;
}
else if (*buf < ' ')
{
*tp++ = '\\'; *tp++ = '^'; *tp++ = '@' + *buf;
buf++;
}
else
{
(void) sprintf(tp, "\\0x%02x", *buf++);
tp += strlen(tp);
}
}
*tp++ = '\0';
return(vbuf);
}
/* env.c ends here */
|
