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1.1 root 1: /*
2: ** Sendmail
3: ** Copyright (c) 1983 Eric P. Allman
4: ** Berkeley, California
5: **
6: ** Copyright (c) 1983 Regents of the University of California.
7: ** All rights reserved. The Berkeley software License Agreement
8: ** specifies the terms and conditions for redistribution.
9: */
10:
11: #ifndef lint
12: static char SccsId[] = "@(#)arpadate.c 5.4 (Berkeley) 1/9/86";
13: #endif not lint
14:
15: # include "conf.h"
16: # ifdef USG
17: # include <time.h>
18: # else
19: # include <sys/time.h>
20: # ifndef V6
21: # include <sys/types.h>
22: # include <sys/timeb.h>
23: # endif V6
24: # endif USG
25: # include "useful.h"
26:
27: # ifdef V6
28: # define OLDTIME
29: # endif V6
30: # ifdef USG
31: # define OLDTIME
32: # endif USG
33:
34: /*
35: ** ARPADATE -- Create date in ARPANET format
36: **
37: ** Parameters:
38: ** ud -- unix style date string. if NULL, one is created.
39: **
40: ** Returns:
41: ** pointer to an ARPANET date field
42: **
43: ** Side Effects:
44: ** none
45: **
46: ** WARNING:
47: ** date is stored in a local buffer -- subsequent
48: ** calls will overwrite.
49: **
50: ** Bugs:
51: ** Timezone is computed from local time, rather than
52: ** from whereever (and whenever) the message was sent.
53: ** To do better is very hard.
54: **
55: ** Some sites are now inserting the timezone into the
56: ** local date. This routine should figure out what
57: ** the format is and work appropriately.
58: */
59:
60: char *
61: arpadate(ud)
62: register char *ud;
63: {
64: register char *p;
65: register char *q;
66: static char b[40];
67: extern char *ctime();
68: register int i;
69: extern struct tm *localtime();
70: extern bool fconvert();
71: # ifdef OLDTIME
72: long t;
73: extern long time();
74: # else OLDTIME
75: struct timeb t;
76: extern struct timeb *ftime();
77: extern char *timezone();
78: # endif OLDTIME
79: # ifdef V6
80: extern char *StdTimezone, *DstTimezone;
81: # endif V6
82: # ifdef USG
83: extern char *tzname[2];
84: # endif USG
85:
86: /*
87: ** Get current time.
88: ** This will be used if a null argument is passed and
89: ** to resolve the timezone.
90: */
91:
92: # ifdef OLDTIME
93: (void) time(&t);
94: if (ud == NULL)
95: ud = ctime(&t);
96: # else
97: ftime(&t);
98: if (ud == NULL)
99: ud = ctime(&t.time);
100: # endif OLDTIME
101:
102: /*
103: ** Crack the UNIX date line in a singularly unoriginal way.
104: */
105:
106: q = b;
107:
108: p = &ud[0]; /* Mon */
109: *q++ = *p++;
110: *q++ = *p++;
111: *q++ = *p++;
112: *q++ = ',';
113: *q++ = ' ';
114:
115: p = &ud[8]; /* 16 */
116: if (*p == ' ')
117: p++;
118: else
119: *q++ = *p++;
120: *q++ = *p++;
121: *q++ = ' ';
122:
123: p = &ud[4]; /* Sep */
124: *q++ = *p++;
125: *q++ = *p++;
126: *q++ = *p++;
127: *q++ = ' ';
128:
129: p = &ud[22]; /* 79 */
130: *q++ = *p++;
131: *q++ = *p++;
132: *q++ = ' ';
133:
134: p = &ud[11]; /* 01:03:52 */
135: for (i = 8; i > 0; i--)
136: *q++ = *p++;
137:
138: /* -PST or -PDT */
139: # ifdef V6
140: if (localtime(&t)->tm_isdst)
141: p = DstTimezone;
142: else
143: p = StdTimezone;
144: # else
145: # ifdef USG
146: if (localtime(&t)->tm_isdst)
147: p = tzname[1];
148: else
149: p = tzname[0];
150: # else
151: p = timezone(t.timezone, localtime(&t.time)->tm_isdst);
152: # endif USG
153: # endif V6
154: if ((strncmp(p, "GMT", 3) == 0 || strncmp(p, "gmt", 3) == 0) &&
155: p[3] != '\0')
156: {
157: /* hours from GMT */
158: p += 3;
159: *q++ = *p++;
160: if (p[1] == ':')
161: *q++ = '0';
162: else
163: *q++ = *p++;
164: *q++ = *p++;
165: p++; /* skip ``:'' */
166: *q++ = *p++;
167: *q++ = *p++;
168: *q = '\0';
169: }
170: else if (!fconvert(p, q))
171: {
172: *q++ = ' ';
173: *q++ = *p++;
174: *q++ = *p++;
175: *q++ = *p++;
176: *q = '\0';
177: }
178:
179: return (b);
180: }
181: /*
182: ** FCONVERT -- convert foreign timezones to ARPA timezones
183: **
184: ** This routine is essentially from Teus Hagen.
185: **
186: ** Parameters:
187: ** a -- timezone as returned from UNIX.
188: ** b -- place to put ARPA-style timezone.
189: **
190: ** Returns:
191: ** TRUE -- if a conversion was made (and b was filled in).
192: ** FALSE -- if this is not a recognized local time.
193: **
194: ** Side Effects:
195: ** none.
196: */
197:
198: /* UNIX to arpa conversion table */
199: struct foreign
200: {
201: char *f_from;
202: char *f_to;
203: };
204:
205: static struct foreign Foreign[] =
206: {
207: { "EET", "+0200" }, /* eastern europe */
208: { "MET", "+0100" }, /* middle europe */
209: { "WET", "GMT" }, /* western europe */
210: { "EET DST", "+0300" }, /* daylight saving times */
211: { "MET DST", "+0200" },
212: { "WET DST", "+0100" },
213: { NULL, NULL }
214: };
215:
216: bool
217: fconvert(a, b)
218: register char *a;
219: char *b;
220: {
221: register struct foreign *euptr;
222: register char *p;
223:
224: for (euptr = Foreign; euptr->f_from != NULL; euptr++)
225: {
226: extern bool sameword();
227:
228: if (sameword(euptr->f_from, a))
229: {
230: p = euptr->f_to;
231: *b++ = ' ';
232: while (*p != '\0')
233: *b++ = *p++;
234: *b = '\0';
235: return (TRUE);
236: }
237: }
238: return (FALSE);
239: }
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