Commit | Line | Data |
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cc9940c7 JB |
1 | /* |
2 | * b2m - a filter for Babyl -> Unix mail files | |
a43dbef8 | 3 | * The copyright on this file has been disclaimed. |
cc9940c7 JB |
4 | * |
5 | * usage: b2m < babyl > mailbox | |
6 | * | |
7 | * I find this useful whenever I have to use a | |
8 | * system which - shock horror! - doesn't run | |
37a9305e PJ |
9 | * GNU Emacs. At least now I can read all my |
10 | * GNU Emacs Babyl format mail files! | |
cc9940c7 JB |
11 | * |
12 | * it's not much but it's free! | |
13 | * | |
14 | * Ed Wilkinson | |
15 | * E.Wilkinson@massey.ac.nz | |
16 | * Mon Nov 7 15:54:06 PDT 1988 | |
17 | */ | |
18 | ||
e19bdc14 RS |
19 | /* Made conformant to the GNU coding standards January, 1995 |
20 | by Francesco Potorti` <pot@cnuce.cnr.it>. */ | |
21 | ||
e19bdc14 RS |
22 | #ifdef HAVE_CONFIG_H |
23 | #include <config.h> | |
24 | /* On some systems, Emacs defines static as nothing for the sake | |
25 | of unexec. We don't want that here since we don't use unexec. */ | |
26 | #undef static | |
27 | #endif | |
fbfed6f0 | 28 | |
4ee9629e PE |
29 | #include <stdio.h> |
30 | #include <time.h> | |
31 | #include <sys/types.h> | |
32 | #include <getopt.h> | |
33 | #ifdef MSDOS | |
34 | #include <fcntl.h> | |
1f8c2f55 AS |
35 | #endif |
36 | ||
e19bdc14 RS |
37 | #undef TRUE |
38 | #define TRUE 1 | |
39 | #undef FALSE | |
40 | #define FALSE 0 | |
cc9940c7 | 41 | |
e19bdc14 RS |
42 | #define streq(s,t) (strcmp (s, t) == 0) |
43 | #define strneq(s,t,n) (strncmp (s, t, n) == 0) | |
44 | ||
45 | typedef int logical; | |
46 | ||
d65b4235 PE |
47 | #define TM_YEAR_BASE 1900 |
48 | ||
49 | /* Nonzero if TM_YEAR is a struct tm's tm_year value that causes | |
50 | asctime to have well-defined behavior. */ | |
51 | #ifndef TM_YEAR_IN_ASCTIME_RANGE | |
f5565804 | 52 | # define TM_YEAR_IN_ASCTIME_RANGE(tm_year) \ |
d65b4235 | 53 | (1000 - TM_YEAR_BASE <= (tm_year) && (tm_year) <= 9999 - TM_YEAR_BASE) |
f5565804 PE |
54 | #endif |
55 | ||
e19bdc14 RS |
56 | /* |
57 | * A `struct linebuffer' is a structure which holds a line of text. | |
58 | * `readline' reads a line from a stream into a linebuffer and works | |
59 | * regardless of the length of the line. | |
60 | */ | |
61 | struct linebuffer | |
62 | { | |
63 | long size; | |
64 | char *buffer; | |
65 | }; | |
66 | ||
67 | extern char *strtok(); | |
128ba46c | 68 | |
0404b62c | 69 | long *xmalloc (), *xrealloc (); |
e19bdc14 RS |
70 | char *concat (); |
71 | long readline (); | |
72 | void fatal (); | |
73 | ||
74 | /* | |
75 | * xnew -- allocate storage. SYNOPSIS: Type *xnew (int n, Type); | |
76 | */ | |
77 | #define xnew(n, Type) ((Type *) xmalloc ((n) * sizeof (Type))) | |
78 | ||
79 | ||
80 | ||
81 | char *progname; | |
cc9940c7 | 82 | |
e4b34a85 KH |
83 | struct option longopts[] = |
84 | { | |
85 | { "help", no_argument, NULL, 'h' }, | |
86 | { "version", no_argument, NULL, 'V' }, | |
87 | { 0 } | |
88 | }; | |
89 | ||
90 | extern int optind; | |
91 | ||
1f8c2f55 | 92 | int |
5d13f393 JB |
93 | main (argc, argv) |
94 | int argc; | |
95 | char **argv; | |
cc9940c7 | 96 | { |
e19bdc14 RS |
97 | logical labels_saved, printing, header; |
98 | time_t ltoday; | |
f5565804 | 99 | struct tm *tm; |
e19bdc14 RS |
100 | char *labels, *p, *today; |
101 | struct linebuffer data; | |
102 | ||
c6880c90 | 103 | #ifdef MSDOS |
e3515d10 | 104 | _fmode = O_BINARY; /* all of files are treated as binary files */ |
18198bb2 RS |
105 | #if __DJGPP__ > 1 |
106 | if (!isatty (fileno (stdout))) | |
107 | setmode (fileno (stdout), O_BINARY); | |
108 | if (!isatty (fileno (stdin))) | |
109 | setmode (fileno (stdin), O_BINARY); | |
110 | #else /* not __DJGPP__ > 1 */ | |
c6880c90 RS |
111 | (stdout)->_flag &= ~_IOTEXT; |
112 | (stdin)->_flag &= ~_IOTEXT; | |
18198bb2 | 113 | #endif /* not __DJGPP__ > 1 */ |
c6880c90 | 114 | #endif |
d4843060 RS |
115 | progname = argv[0]; |
116 | ||
e4b34a85 KH |
117 | while (1) |
118 | { | |
119 | int opt = getopt_long (argc, argv, "hV", longopts, 0); | |
120 | if (opt == EOF) | |
121 | break; | |
122 | ||
123 | switch (opt) | |
124 | { | |
125 | case 'V': | |
126 | printf ("%s (GNU Emacs %s)\n", "b2m", VERSION); | |
127 | puts ("b2m is in the public domain."); | |
3f0656ff | 128 | exit (EXIT_SUCCESS); |
e4b34a85 KH |
129 | |
130 | case 'h': | |
131 | fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname); | |
3f0656ff | 132 | exit (EXIT_SUCCESS); |
e4b34a85 KH |
133 | } |
134 | } | |
135 | ||
136 | if (optind != argc) | |
88d00c7e | 137 | { |
e19bdc14 | 138 | fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname); |
3f0656ff | 139 | exit (EXIT_SUCCESS); |
88d00c7e | 140 | } |
e4b34a85 | 141 | |
e19bdc14 | 142 | labels_saved = printing = header = FALSE; |
e3515d10 | 143 | ltoday = time (0); |
f5565804 PE |
144 | /* Convert to a string, checking for out-of-range time stamps. |
145 | Don't use 'ctime', as that might dump core if the hardware clock | |
146 | is set to a bizarre value. */ | |
147 | tm = localtime (<oday); | |
d65b4235 PE |
148 | if (! (tm && TM_YEAR_IN_ASCTIME_RANGE (tm->tm_year) |
149 | && (today = asctime (tm)))) | |
f5565804 | 150 | fatal ("current time is out of range"); |
e19bdc14 RS |
151 | data.size = 200; |
152 | data.buffer = xnew (200, char); | |
cc9940c7 | 153 | |
e19bdc14 RS |
154 | if (readline (&data, stdin) == 0 |
155 | || !strneq (data.buffer, "BABYL OPTIONS:", 14)) | |
156 | fatal ("standard input is not a Babyl mailfile."); | |
cc9940c7 | 157 | |
e19bdc14 | 158 | while (readline (&data, stdin) > 0) |
e3515d10 | 159 | { |
e19bdc14 | 160 | if (streq (data.buffer, "*** EOOH ***") && !printing) |
e3515d10 RS |
161 | { |
162 | printing = header = TRUE; | |
d4843060 | 163 | printf ("From \"Babyl to mail by %s\" %s", progname, today); |
e3515d10 RS |
164 | continue; |
165 | } | |
88d00c7e | 166 | |
e19bdc14 | 167 | if (data.buffer[0] == '\037') |
e3515d10 | 168 | { |
e19bdc14 RS |
169 | if (data.buffer[1] == '\0') |
170 | continue; | |
171 | else if (data.buffer[1] == '\f') | |
e3515d10 | 172 | { |
e19bdc14 RS |
173 | /* Save labels. */ |
174 | readline (&data, stdin); | |
175 | p = strtok (data.buffer, " ,\r\n\t"); | |
176 | labels = "X-Babyl-Labels: "; | |
cc9940c7 | 177 | |
25b18337 | 178 | while ((p = strtok (NULL, " ,\r\n\t"))) |
e19bdc14 RS |
179 | labels = concat (labels, p, ", "); |
180 | ||
7a804c76 KH |
181 | p = &labels[strlen (labels) - 2]; |
182 | if (*p == ',') | |
183 | *p = '\0'; | |
e19bdc14 RS |
184 | printing = header = FALSE; |
185 | labels_saved = TRUE; | |
186 | continue; | |
187 | } | |
e3515d10 | 188 | } |
cc9940c7 | 189 | |
e19bdc14 | 190 | if ((data.buffer[0] == '\0') && header) |
e3515d10 RS |
191 | { |
192 | header = FALSE; | |
e19bdc14 | 193 | if (labels_saved) |
e3515d10 RS |
194 | puts (labels); |
195 | } | |
e19bdc14 | 196 | |
e3515d10 | 197 | if (printing) |
e19bdc14 RS |
198 | puts (data.buffer); |
199 | } | |
3a213356 | 200 | |
3f0656ff | 201 | return EXIT_SUCCESS; |
e19bdc14 RS |
202 | } |
203 | ||
204 | ||
205 | ||
206 | /* | |
207 | * Return a newly-allocated string whose contents | |
208 | * concatenate those of s1, s2, s3. | |
209 | */ | |
210 | char * | |
211 | concat (s1, s2, s3) | |
212 | char *s1, *s2, *s3; | |
213 | { | |
214 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
215 | char *result = xnew (len1 + len2 + len3 + 1, char); | |
216 | ||
217 | strcpy (result, s1); | |
218 | strcpy (result + len1, s2); | |
219 | strcpy (result + len1 + len2, s3); | |
220 | result[len1 + len2 + len3] = '\0'; | |
221 | ||
222 | return result; | |
223 | } | |
224 | ||
225 | /* | |
226 | * Read a line of text from `stream' into `linebuffer'. | |
227 | * Return the number of characters read from `stream', | |
228 | * which is the length of the line including the newline, if any. | |
229 | */ | |
230 | long | |
231 | readline (linebuffer, stream) | |
232 | struct linebuffer *linebuffer; | |
233 | register FILE *stream; | |
234 | { | |
235 | char *buffer = linebuffer->buffer; | |
236 | register char *p = linebuffer->buffer; | |
237 | register char *pend; | |
238 | int chars_deleted; | |
239 | ||
240 | pend = p + linebuffer->size; /* Separate to avoid 386/IX compiler bug. */ | |
241 | ||
242 | while (1) | |
243 | { | |
244 | register int c = getc (stream); | |
245 | if (p == pend) | |
246 | { | |
247 | linebuffer->size *= 2; | |
248 | buffer = (char *) xrealloc (buffer, linebuffer->size); | |
249 | p += buffer - linebuffer->buffer; | |
250 | pend = buffer + linebuffer->size; | |
251 | linebuffer->buffer = buffer; | |
252 | } | |
253 | if (c == EOF) | |
254 | { | |
5326c1d6 | 255 | *p = '\0'; |
e19bdc14 RS |
256 | chars_deleted = 0; |
257 | break; | |
258 | } | |
259 | if (c == '\n') | |
260 | { | |
5326c1d6 | 261 | if (p > buffer && p[-1] == '\r') |
e19bdc14 RS |
262 | { |
263 | *--p = '\0'; | |
264 | chars_deleted = 2; | |
265 | } | |
266 | else | |
267 | { | |
268 | *p = '\0'; | |
269 | chars_deleted = 1; | |
270 | } | |
271 | break; | |
272 | } | |
273 | *p++ = c; | |
e3515d10 | 274 | } |
e19bdc14 RS |
275 | |
276 | return (p - buffer + chars_deleted); | |
cc9940c7 | 277 | } |
e19bdc14 RS |
278 | |
279 | /* | |
280 | * Like malloc but get fatal error if memory is exhausted. | |
281 | */ | |
0404b62c | 282 | long * |
e19bdc14 RS |
283 | xmalloc (size) |
284 | unsigned int size; | |
285 | { | |
0404b62c | 286 | long *result = (long *) malloc (size); |
e19bdc14 RS |
287 | if (result == NULL) |
288 | fatal ("virtual memory exhausted"); | |
289 | return result; | |
290 | } | |
291 | ||
0404b62c | 292 | long * |
e19bdc14 RS |
293 | xrealloc (ptr, size) |
294 | char *ptr; | |
295 | unsigned int size; | |
296 | { | |
0404b62c | 297 | long *result = (long *) realloc (ptr, size); |
e19bdc14 RS |
298 | if (result == NULL) |
299 | fatal ("virtual memory exhausted"); | |
300 | return result; | |
301 | } | |
302 | ||
303 | void | |
304 | fatal (message) | |
5c0b76c1 | 305 | char *message; |
e19bdc14 RS |
306 | { |
307 | fprintf (stderr, "%s: %s\n", progname, message); | |
3f0656ff | 308 | exit (EXIT_FAILURE); |
e19bdc14 RS |
309 | } |
310 | ||
ab5796a9 MB |
311 | /* arch-tag: 5a3ad2af-a802-408f-83cc-e7cf5e98653e |
312 | (do not change this comment) */ | |
3f0656ff TTN |
313 | |
314 | /* b2m.c ends here */ |