1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.31 |
static const char RCSid[] = "$Id: header.c,v 2.30 2017/05/07 16:14:19 greg Exp $"; |
3 |
greg |
1.1 |
#endif |
4 |
|
|
/* |
5 |
|
|
* header.c - routines for reading and writing information headers. |
6 |
|
|
* |
7 |
greg |
2.11 |
* Externals declared in resolu.h |
8 |
greg |
1.3 |
* |
9 |
greg |
2.4 |
* newheader(t,fp) start new information header identified by string t |
10 |
|
|
* headidval(r,s) copy header identifier value in s to r |
11 |
greg |
2.25 |
* dateval(t,s) get capture date value as UTC |
12 |
|
|
* gmtval(t,s) get GMT as UTC |
13 |
|
|
* fputdate(t,fp) put out the given UTC |
14 |
greg |
2.11 |
* fputnow(fp) put out the current date and time |
15 |
greg |
2.3 |
* printargs(ac,av,fp) print an argument list to fp, followed by '\n' |
16 |
greg |
1.3 |
* formatval(r,s) copy the format value in s to r |
17 |
|
|
* fputformat(s,fp) write "FORMAT=%s" to fp |
18 |
|
|
* getheader(fp,f,p) read header from fp, calling f(s,p) on each line |
19 |
greg |
2.6 |
* globmatch(pat, str) check for glob match of str against pat |
20 |
greg |
1.3 |
* checkheader(i,p,o) check header format from i against p and copy to o |
21 |
|
|
* |
22 |
|
|
* To copy header from input to output, use getheader(fin, fputs, fout) |
23 |
greg |
1.1 |
*/ |
24 |
|
|
|
25 |
greg |
2.12 |
#include "copyright.h" |
26 |
greg |
2.11 |
|
27 |
greg |
1.3 |
#include <ctype.h> |
28 |
schorsch |
2.17 |
|
29 |
greg |
2.18 |
#include "rtio.h" |
30 |
|
|
#include "resolu.h" |
31 |
schorsch |
2.14 |
|
32 |
greg |
2.24 |
#define MAXLINE 2048 |
33 |
greg |
2.2 |
|
34 |
greg |
2.26 |
extern time_t timegm(struct tm *tm); |
35 |
|
|
|
36 |
greg |
2.25 |
const char HDRSTR[] = "#?"; /* information header magic number */ |
37 |
greg |
1.2 |
|
38 |
greg |
2.25 |
const char FMTSTR[] = "FORMAT="; /* format identifier */ |
39 |
greg |
1.2 |
|
40 |
greg |
2.25 |
const char TMSTR[] = "CAPDATE="; /* capture date identifier */ |
41 |
|
|
const char GMTSTR[] = "GMT="; /* GMT identifier */ |
42 |
greg |
2.16 |
|
43 |
schorsch |
2.22 |
static gethfunc mycheck; |
44 |
greg |
2.4 |
|
45 |
greg |
2.11 |
|
46 |
greg |
2.29 |
void |
47 |
schorsch |
2.22 |
newheader( /* identifying line of information header */ |
48 |
greg |
2.31 |
const char *s, |
49 |
greg |
2.25 |
FILE *fp |
50 |
schorsch |
2.22 |
) |
51 |
greg |
2.4 |
{ |
52 |
|
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fputs(HDRSTR, fp); |
53 |
|
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fputs(s, fp); |
54 |
|
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putc('\n', fp); |
55 |
|
|
} |
56 |
|
|
|
57 |
|
|
|
58 |
greg |
2.29 |
int |
59 |
schorsch |
2.22 |
headidval( /* get header id (return true if is id) */ |
60 |
greg |
2.25 |
char *r, |
61 |
greg |
2.31 |
const char *s |
62 |
schorsch |
2.22 |
) |
63 |
greg |
2.4 |
{ |
64 |
greg |
2.25 |
const char *cp = HDRSTR; |
65 |
greg |
2.4 |
|
66 |
|
|
while (*cp) if (*cp++ != *s++) return(0); |
67 |
|
|
if (r == NULL) return(1); |
68 |
gregl |
2.9 |
while (*s && !isspace(*s)) *r++ = *s++; |
69 |
greg |
2.4 |
*r = '\0'; |
70 |
|
|
return(1); |
71 |
|
|
} |
72 |
|
|
|
73 |
|
|
|
74 |
greg |
2.29 |
int |
75 |
greg |
2.25 |
dateval( /* convert capture date line to UTC */ |
76 |
schorsch |
2.22 |
time_t *tloc, |
77 |
greg |
2.31 |
const char *s |
78 |
schorsch |
2.22 |
) |
79 |
greg |
2.11 |
{ |
80 |
|
|
struct tm tms; |
81 |
greg |
2.25 |
const char *cp = TMSTR; |
82 |
greg |
2.11 |
|
83 |
|
|
while (*cp) if (*cp++ != *s++) return(0); |
84 |
|
|
while (isspace(*s)) s++; |
85 |
|
|
if (!*s) return(0); |
86 |
|
|
if (sscanf(s, "%d:%d:%d %d:%d:%d", |
87 |
|
|
&tms.tm_year, &tms.tm_mon, &tms.tm_mday, |
88 |
|
|
&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6) |
89 |
|
|
return(0); |
90 |
|
|
if (tloc == NULL) |
91 |
|
|
return(1); |
92 |
|
|
tms.tm_mon--; |
93 |
|
|
tms.tm_year -= 1900; |
94 |
|
|
tms.tm_isdst = -1; /* ask mktime() to figure out DST */ |
95 |
|
|
*tloc = mktime(&tms); |
96 |
|
|
return(1); |
97 |
|
|
} |
98 |
|
|
|
99 |
|
|
|
100 |
greg |
2.29 |
int |
101 |
greg |
2.25 |
gmtval( /* convert GMT date line to UTC */ |
102 |
|
|
time_t *tloc, |
103 |
greg |
2.31 |
const char *s |
104 |
schorsch |
2.22 |
) |
105 |
greg |
2.11 |
{ |
106 |
greg |
2.25 |
struct tm tms; |
107 |
|
|
const char *cp = GMTSTR; |
108 |
|
|
|
109 |
|
|
while (*cp) if (*cp++ != *s++) return(0); |
110 |
|
|
while (isspace(*s)) s++; |
111 |
|
|
if (!*s) return(0); |
112 |
|
|
if (sscanf(s, "%d:%d:%d %d:%d:%d", |
113 |
|
|
&tms.tm_year, &tms.tm_mon, &tms.tm_mday, |
114 |
|
|
&tms.tm_hour, &tms.tm_min, &tms.tm_sec) != 6) |
115 |
|
|
return(0); |
116 |
|
|
if (tloc == NULL) |
117 |
|
|
return(1); |
118 |
|
|
tms.tm_mon--; |
119 |
|
|
tms.tm_year -= 1900; |
120 |
|
|
*tloc = timegm(&tms); |
121 |
|
|
return(1); |
122 |
greg |
2.11 |
} |
123 |
|
|
|
124 |
|
|
|
125 |
greg |
2.29 |
void |
126 |
greg |
2.25 |
fputdate( /* write out the given time value (local & GMT) */ |
127 |
schorsch |
2.22 |
time_t tv, |
128 |
|
|
FILE *fp |
129 |
|
|
) |
130 |
greg |
2.11 |
{ |
131 |
greg |
2.25 |
struct tm *tms; |
132 |
|
|
|
133 |
|
|
tms = localtime(&tv); |
134 |
|
|
if (tms != NULL) |
135 |
|
|
fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", TMSTR, |
136 |
|
|
tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday, |
137 |
|
|
tms->tm_hour, tms->tm_min, tms->tm_sec); |
138 |
|
|
tms = gmtime(&tv); |
139 |
|
|
if (tms != NULL) |
140 |
|
|
fprintf(fp, "%s %04d:%02d:%02d %02d:%02d:%02d\n", GMTSTR, |
141 |
|
|
tms->tm_year+1900, tms->tm_mon+1, tms->tm_mday, |
142 |
|
|
tms->tm_hour, tms->tm_min, tms->tm_sec); |
143 |
greg |
2.11 |
} |
144 |
|
|
|
145 |
|
|
|
146 |
greg |
2.29 |
void |
147 |
schorsch |
2.22 |
fputnow( /* write out the current time */ |
148 |
|
|
FILE *fp |
149 |
|
|
) |
150 |
greg |
2.11 |
{ |
151 |
|
|
time_t tv; |
152 |
|
|
time(&tv); |
153 |
|
|
fputdate(tv, fp); |
154 |
|
|
} |
155 |
|
|
|
156 |
|
|
|
157 |
greg |
2.29 |
void |
158 |
schorsch |
2.22 |
printargs( /* print arguments to a file */ |
159 |
|
|
int ac, |
160 |
|
|
char **av, |
161 |
|
|
FILE *fp |
162 |
|
|
) |
163 |
greg |
1.1 |
{ |
164 |
|
|
while (ac-- > 0) { |
165 |
greg |
2.11 |
fputword(*av++, fp); |
166 |
|
|
fputc(ac ? ' ' : '\n', fp); |
167 |
greg |
1.1 |
} |
168 |
|
|
} |
169 |
|
|
|
170 |
|
|
|
171 |
greg |
2.29 |
int |
172 |
schorsch |
2.22 |
formatval( /* get format value (return true if format) */ |
173 |
greg |
2.25 |
char *r, |
174 |
greg |
2.31 |
const char *s |
175 |
schorsch |
2.22 |
) |
176 |
greg |
1.2 |
{ |
177 |
greg |
2.25 |
const char *cp = FMTSTR; |
178 |
greg |
2.4 |
|
179 |
|
|
while (*cp) if (*cp++ != *s++) return(0); |
180 |
greg |
1.3 |
while (isspace(*s)) s++; |
181 |
greg |
2.4 |
if (!*s) return(0); |
182 |
|
|
if (r == NULL) return(1); |
183 |
greg |
2.5 |
do |
184 |
|
|
*r++ = *s++; |
185 |
greg |
2.28 |
while (*s && !isspace(*s)); |
186 |
greg |
1.2 |
*r = '\0'; |
187 |
greg |
2.4 |
return(1); |
188 |
greg |
1.2 |
} |
189 |
|
|
|
190 |
|
|
|
191 |
greg |
2.29 |
void |
192 |
schorsch |
2.22 |
fputformat( /* put out a format value */ |
193 |
greg |
2.31 |
const char *s, |
194 |
schorsch |
2.22 |
FILE *fp |
195 |
|
|
) |
196 |
greg |
1.2 |
{ |
197 |
|
|
fputs(FMTSTR, fp); |
198 |
|
|
fputs(s, fp); |
199 |
|
|
putc('\n', fp); |
200 |
|
|
} |
201 |
|
|
|
202 |
|
|
|
203 |
greg |
2.29 |
int |
204 |
schorsch |
2.22 |
getheader( /* get header from file */ |
205 |
|
|
FILE *fp, |
206 |
|
|
gethfunc *f, |
207 |
|
|
void *p |
208 |
|
|
) |
209 |
greg |
1.1 |
{ |
210 |
greg |
2.30 |
int rtotal = 0; |
211 |
greg |
1.1 |
char buf[MAXLINE]; |
212 |
|
|
|
213 |
|
|
for ( ; ; ) { |
214 |
greg |
2.30 |
int rval = 0; |
215 |
greg |
1.1 |
buf[MAXLINE-2] = '\n'; |
216 |
greg |
2.3 |
if (fgets(buf, MAXLINE, fp) == NULL) |
217 |
greg |
1.1 |
return(-1); |
218 |
greg |
2.28 |
if (buf[buf[0]=='\r'] == '\n') |
219 |
greg |
2.30 |
return(rtotal); |
220 |
greg |
1.1 |
if (buf[MAXLINE-2] != '\n') { |
221 |
|
|
ungetc(buf[MAXLINE-2], fp); /* prevent false end */ |
222 |
|
|
buf[MAXLINE-2] = '\0'; |
223 |
|
|
} |
224 |
greg |
2.30 |
if (f != NULL && (rval = (*f)(buf, p)) < 0) |
225 |
gwlarson |
2.10 |
return(-1); |
226 |
greg |
2.30 |
rtotal += rval; |
227 |
greg |
1.1 |
} |
228 |
|
|
} |
229 |
|
|
|
230 |
|
|
|
231 |
greg |
1.2 |
struct check { |
232 |
|
|
FILE *fp; |
233 |
greg |
1.3 |
char fs[64]; |
234 |
greg |
1.2 |
}; |
235 |
greg |
1.1 |
|
236 |
greg |
1.2 |
|
237 |
greg |
2.11 |
static int |
238 |
schorsch |
2.22 |
mycheck( /* check a header line for format info. */ |
239 |
|
|
char *s, |
240 |
|
|
void *cp |
241 |
|
|
) |
242 |
|
|
{ |
243 |
|
|
if (!formatval(((struct check*)cp)->fs, s) |
244 |
|
|
&& ((struct check*)cp)->fp != NULL) { |
245 |
|
|
fputs(s, ((struct check*)cp)->fp); |
246 |
|
|
} |
247 |
greg |
2.11 |
return(0); |
248 |
greg |
1.1 |
} |
249 |
|
|
|
250 |
|
|
|
251 |
greg |
2.29 |
int |
252 |
schorsch |
2.22 |
globmatch( /* check for match of s against pattern p */ |
253 |
greg |
2.31 |
const char *p, |
254 |
|
|
const char *s |
255 |
schorsch |
2.22 |
) |
256 |
greg |
1.3 |
{ |
257 |
greg |
2.11 |
int setmatch; |
258 |
greg |
1.3 |
|
259 |
|
|
do { |
260 |
|
|
switch (*p) { |
261 |
|
|
case '?': /* match any character */ |
262 |
|
|
if (!*s++) |
263 |
|
|
return(0); |
264 |
|
|
break; |
265 |
|
|
case '*': /* match any string */ |
266 |
|
|
while (p[1] == '*') p++; |
267 |
|
|
do |
268 |
greg |
2.28 |
if ( (p[1]=='?') | (p[1]==*s) && |
269 |
greg |
2.6 |
globmatch(p+1,s) ) |
270 |
greg |
1.3 |
return(1); |
271 |
|
|
while (*s++); |
272 |
|
|
return(0); |
273 |
greg |
2.11 |
case '[': /* character set */ |
274 |
|
|
setmatch = *s == *++p; |
275 |
|
|
if (!*p) |
276 |
|
|
return(0); |
277 |
|
|
while (*++p != ']') { |
278 |
|
|
if (!*p) |
279 |
|
|
return(0); |
280 |
|
|
if (*p == '-') { |
281 |
greg |
2.28 |
setmatch += (p[-1] <= *s && *s <= p[1]); |
282 |
greg |
2.11 |
if (!*++p) |
283 |
|
|
break; |
284 |
|
|
} else |
285 |
greg |
2.28 |
setmatch += (*p == *s); |
286 |
greg |
2.11 |
} |
287 |
|
|
if (!setmatch) |
288 |
|
|
return(0); |
289 |
|
|
s++; |
290 |
|
|
break; |
291 |
greg |
1.3 |
case '\\': /* literal next */ |
292 |
|
|
p++; |
293 |
|
|
/* fall through */ |
294 |
|
|
default: /* normal character */ |
295 |
|
|
if (*p != *s) |
296 |
|
|
return(0); |
297 |
|
|
s++; |
298 |
|
|
break; |
299 |
|
|
} |
300 |
|
|
} while (*p++); |
301 |
|
|
return(1); |
302 |
|
|
} |
303 |
|
|
|
304 |
|
|
|
305 |
|
|
/* |
306 |
|
|
* Checkheader(fin,fmt,fout) returns a value of 1 if the input format |
307 |
|
|
* matches the specification in fmt, 0 if no input format was found, |
308 |
|
|
* and -1 if the input format does not match or there is an |
309 |
greg |
1.4 |
* error reading the header. If fmt is empty, then -1 is returned |
310 |
greg |
1.3 |
* if any input format is found (or there is an error), and 0 otherwise. |
311 |
|
|
* If fmt contains any '*' or '?' characters, then checkheader |
312 |
|
|
* does wildcard expansion and copies a matching result into fmt. |
313 |
greg |
2.7 |
* Be sure that fmt is big enough to hold the match in such cases, |
314 |
|
|
* and that it is not a static, read-only string! |
315 |
greg |
1.3 |
* The input header (minus any format lines) is copied to fout |
316 |
|
|
* if fout is not NULL. |
317 |
|
|
*/ |
318 |
|
|
|
319 |
greg |
2.29 |
int |
320 |
schorsch |
2.22 |
checkheader( |
321 |
|
|
FILE *fin, |
322 |
|
|
char *fmt, |
323 |
|
|
FILE *fout |
324 |
|
|
) |
325 |
greg |
1.1 |
{ |
326 |
greg |
1.2 |
struct check cdat; |
327 |
greg |
2.25 |
char *cp; |
328 |
greg |
1.2 |
|
329 |
|
|
cdat.fp = fout; |
330 |
|
|
cdat.fs[0] = '\0'; |
331 |
schorsch |
2.22 |
if (getheader(fin, mycheck, &cdat) < 0) |
332 |
greg |
1.3 |
return(-1); |
333 |
greg |
2.6 |
if (!cdat.fs[0]) |
334 |
|
|
return(0); |
335 |
greg |
2.7 |
for (cp = fmt; *cp; cp++) /* check for globbing */ |
336 |
schorsch |
2.20 |
if ((*cp == '?') | (*cp == '*')) { |
337 |
greg |
2.7 |
if (globmatch(fmt, cdat.fs)) { |
338 |
|
|
strcpy(fmt, cdat.fs); |
339 |
|
|
return(1); |
340 |
|
|
} else |
341 |
|
|
return(-1); |
342 |
schorsch |
2.19 |
} |
343 |
greg |
2.7 |
return(strcmp(fmt, cdat.fs) ? -1 : 1); /* literal match */ |
344 |
greg |
1.1 |
} |