Commit | Line | Data |
---|---|---|
cc9940c7 JB |
1 | /* |
2 | * b2m - a filter for Babyl -> Unix mail files | |
3 | * | |
4 | * usage: b2m < babyl > mailbox | |
5 | * | |
6 | * I find this useful whenever I have to use a | |
7 | * system which - shock horror! - doesn't run | |
8 | * Gnu emacs. At least now I can read all my | |
9 | * Gnumacs Babyl format mail files! | |
10 | * | |
11 | * it's not much but it's free! | |
12 | * | |
13 | * Ed Wilkinson | |
14 | * E.Wilkinson@massey.ac.nz | |
15 | * Mon Nov 7 15:54:06 PDT 1988 | |
16 | */ | |
17 | ||
e19bdc14 RS |
18 | /* Made conformant to the GNU coding standards January, 1995 |
19 | by Francesco Potorti` <pot@cnuce.cnr.it>. */ | |
20 | ||
e19bdc14 RS |
21 | #ifdef HAVE_CONFIG_H |
22 | #include <config.h> | |
23 | /* On some systems, Emacs defines static as nothing for the sake | |
24 | of unexec. We don't want that here since we don't use unexec. */ | |
25 | #undef static | |
26 | #endif | |
fbfed6f0 | 27 | |
4ee9629e PE |
28 | #include <stdio.h> |
29 | #include <time.h> | |
30 | #include <sys/types.h> | |
31 | #include <getopt.h> | |
32 | #ifdef MSDOS | |
33 | #include <fcntl.h> | |
1f8c2f55 AS |
34 | #endif |
35 | ||
e19bdc14 RS |
36 | #undef TRUE |
37 | #define TRUE 1 | |
38 | #undef FALSE | |
39 | #define FALSE 0 | |
cc9940c7 | 40 | |
e19bdc14 RS |
41 | /* Exit codes for success and failure. */ |
42 | #ifdef VMS | |
43 | #define GOOD 1 | |
44 | #define BAD 0 | |
45 | #else | |
46 | #define GOOD 0 | |
47 | #define BAD 1 | |
cbc61077 | 48 | #endif |
cc9940c7 | 49 | |
e19bdc14 RS |
50 | #define streq(s,t) (strcmp (s, t) == 0) |
51 | #define strneq(s,t,n) (strncmp (s, t, n) == 0) | |
52 | ||
53 | typedef int logical; | |
54 | ||
55 | /* | |
56 | * A `struct linebuffer' is a structure which holds a line of text. | |
57 | * `readline' reads a line from a stream into a linebuffer and works | |
58 | * regardless of the length of the line. | |
59 | */ | |
60 | struct linebuffer | |
61 | { | |
62 | long size; | |
63 | char *buffer; | |
64 | }; | |
65 | ||
66 | extern char *strtok(); | |
128ba46c | 67 | |
0404b62c | 68 | long *xmalloc (), *xrealloc (); |
e19bdc14 RS |
69 | char *concat (); |
70 | long readline (); | |
71 | void fatal (); | |
72 | ||
73 | /* | |
74 | * xnew -- allocate storage. SYNOPSIS: Type *xnew (int n, Type); | |
75 | */ | |
76 | #define xnew(n, Type) ((Type *) xmalloc ((n) * sizeof (Type))) | |
77 | ||
78 | ||
79 | ||
80 | char *progname; | |
cc9940c7 | 81 | |
e4b34a85 KH |
82 | struct option longopts[] = |
83 | { | |
84 | { "help", no_argument, NULL, 'h' }, | |
85 | { "version", no_argument, NULL, 'V' }, | |
86 | { 0 } | |
87 | }; | |
88 | ||
89 | extern int optind; | |
90 | ||
1f8c2f55 | 91 | int |
5d13f393 JB |
92 | main (argc, argv) |
93 | int argc; | |
94 | char **argv; | |
cc9940c7 | 95 | { |
e19bdc14 RS |
96 | logical labels_saved, printing, header; |
97 | time_t ltoday; | |
98 | char *labels, *p, *today; | |
99 | struct linebuffer data; | |
100 | ||
c6880c90 | 101 | #ifdef MSDOS |
e3515d10 | 102 | _fmode = O_BINARY; /* all of files are treated as binary files */ |
18198bb2 RS |
103 | #if __DJGPP__ > 1 |
104 | if (!isatty (fileno (stdout))) | |
105 | setmode (fileno (stdout), O_BINARY); | |
106 | if (!isatty (fileno (stdin))) | |
107 | setmode (fileno (stdin), O_BINARY); | |
108 | #else /* not __DJGPP__ > 1 */ | |
c6880c90 RS |
109 | (stdout)->_flag &= ~_IOTEXT; |
110 | (stdin)->_flag &= ~_IOTEXT; | |
18198bb2 | 111 | #endif /* not __DJGPP__ > 1 */ |
c6880c90 | 112 | #endif |
d4843060 RS |
113 | progname = argv[0]; |
114 | ||
e4b34a85 KH |
115 | while (1) |
116 | { | |
117 | int opt = getopt_long (argc, argv, "hV", longopts, 0); | |
118 | if (opt == EOF) | |
119 | break; | |
120 | ||
121 | switch (opt) | |
122 | { | |
123 | case 'V': | |
124 | printf ("%s (GNU Emacs %s)\n", "b2m", VERSION); | |
125 | puts ("b2m is in the public domain."); | |
126 | exit (GOOD); | |
127 | ||
128 | case 'h': | |
129 | fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname); | |
130 | exit (GOOD); | |
131 | } | |
132 | } | |
133 | ||
134 | if (optind != argc) | |
88d00c7e | 135 | { |
e19bdc14 RS |
136 | fprintf (stderr, "Usage: %s <babylmailbox >unixmailbox\n", progname); |
137 | exit (GOOD); | |
88d00c7e | 138 | } |
e4b34a85 | 139 | |
e19bdc14 | 140 | labels_saved = printing = header = FALSE; |
e3515d10 RS |
141 | ltoday = time (0); |
142 | today = ctime (<oday); | |
e19bdc14 RS |
143 | data.size = 200; |
144 | data.buffer = xnew (200, char); | |
cc9940c7 | 145 | |
e19bdc14 RS |
146 | if (readline (&data, stdin) == 0 |
147 | || !strneq (data.buffer, "BABYL OPTIONS:", 14)) | |
148 | fatal ("standard input is not a Babyl mailfile."); | |
cc9940c7 | 149 | |
e19bdc14 | 150 | while (readline (&data, stdin) > 0) |
e3515d10 | 151 | { |
e19bdc14 | 152 | if (streq (data.buffer, "*** EOOH ***") && !printing) |
e3515d10 RS |
153 | { |
154 | printing = header = TRUE; | |
d4843060 | 155 | printf ("From \"Babyl to mail by %s\" %s", progname, today); |
e3515d10 RS |
156 | continue; |
157 | } | |
88d00c7e | 158 | |
e19bdc14 | 159 | if (data.buffer[0] == '\037') |
e3515d10 | 160 | { |
e19bdc14 RS |
161 | if (data.buffer[1] == '\0') |
162 | continue; | |
163 | else if (data.buffer[1] == '\f') | |
e3515d10 | 164 | { |
e19bdc14 RS |
165 | /* Save labels. */ |
166 | readline (&data, stdin); | |
167 | p = strtok (data.buffer, " ,\r\n\t"); | |
168 | labels = "X-Babyl-Labels: "; | |
cc9940c7 | 169 | |
e19bdc14 RS |
170 | while (p = strtok (NULL, " ,\r\n\t")) |
171 | labels = concat (labels, p, ", "); | |
172 | ||
7a804c76 KH |
173 | p = &labels[strlen (labels) - 2]; |
174 | if (*p == ',') | |
175 | *p = '\0'; | |
e19bdc14 RS |
176 | printing = header = FALSE; |
177 | labels_saved = TRUE; | |
178 | continue; | |
179 | } | |
e3515d10 | 180 | } |
cc9940c7 | 181 | |
e19bdc14 | 182 | if ((data.buffer[0] == '\0') && header) |
e3515d10 RS |
183 | { |
184 | header = FALSE; | |
e19bdc14 | 185 | if (labels_saved) |
e3515d10 RS |
186 | puts (labels); |
187 | } | |
e19bdc14 | 188 | |
e3515d10 | 189 | if (printing) |
e19bdc14 RS |
190 | puts (data.buffer); |
191 | } | |
192 | } | |
193 | ||
194 | ||
195 | ||
196 | /* | |
197 | * Return a newly-allocated string whose contents | |
198 | * concatenate those of s1, s2, s3. | |
199 | */ | |
200 | char * | |
201 | concat (s1, s2, s3) | |
202 | char *s1, *s2, *s3; | |
203 | { | |
204 | int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3); | |
205 | char *result = xnew (len1 + len2 + len3 + 1, char); | |
206 | ||
207 | strcpy (result, s1); | |
208 | strcpy (result + len1, s2); | |
209 | strcpy (result + len1 + len2, s3); | |
210 | result[len1 + len2 + len3] = '\0'; | |
211 | ||
212 | return result; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Read a line of text from `stream' into `linebuffer'. | |
217 | * Return the number of characters read from `stream', | |
218 | * which is the length of the line including the newline, if any. | |
219 | */ | |
220 | long | |
221 | readline (linebuffer, stream) | |
222 | struct linebuffer *linebuffer; | |
223 | register FILE *stream; | |
224 | { | |
225 | char *buffer = linebuffer->buffer; | |
226 | register char *p = linebuffer->buffer; | |
227 | register char *pend; | |
228 | int chars_deleted; | |
229 | ||
230 | pend = p + linebuffer->size; /* Separate to avoid 386/IX compiler bug. */ | |
231 | ||
232 | while (1) | |
233 | { | |
234 | register int c = getc (stream); | |
235 | if (p == pend) | |
236 | { | |
237 | linebuffer->size *= 2; | |
238 | buffer = (char *) xrealloc (buffer, linebuffer->size); | |
239 | p += buffer - linebuffer->buffer; | |
240 | pend = buffer + linebuffer->size; | |
241 | linebuffer->buffer = buffer; | |
242 | } | |
243 | if (c == EOF) | |
244 | { | |
5326c1d6 | 245 | *p = '\0'; |
e19bdc14 RS |
246 | chars_deleted = 0; |
247 | break; | |
248 | } | |
249 | if (c == '\n') | |
250 | { | |
5326c1d6 | 251 | if (p > buffer && p[-1] == '\r') |
e19bdc14 RS |
252 | { |
253 | *--p = '\0'; | |
254 | chars_deleted = 2; | |
255 | } | |
256 | else | |
257 | { | |
258 | *p = '\0'; | |
259 | chars_deleted = 1; | |
260 | } | |
261 | break; | |
262 | } | |
263 | *p++ = c; | |
e3515d10 | 264 | } |
e19bdc14 RS |
265 | |
266 | return (p - buffer + chars_deleted); | |
cc9940c7 | 267 | } |
e19bdc14 RS |
268 | |
269 | /* | |
270 | * Like malloc but get fatal error if memory is exhausted. | |
271 | */ | |
0404b62c | 272 | long * |
e19bdc14 RS |
273 | xmalloc (size) |
274 | unsigned int size; | |
275 | { | |
0404b62c | 276 | long *result = (long *) malloc (size); |
e19bdc14 RS |
277 | if (result == NULL) |
278 | fatal ("virtual memory exhausted"); | |
279 | return result; | |
280 | } | |
281 | ||
0404b62c | 282 | long * |
e19bdc14 RS |
283 | xrealloc (ptr, size) |
284 | char *ptr; | |
285 | unsigned int size; | |
286 | { | |
0404b62c | 287 | long *result = (long *) realloc (ptr, size); |
e19bdc14 RS |
288 | if (result == NULL) |
289 | fatal ("virtual memory exhausted"); | |
290 | return result; | |
291 | } | |
292 | ||
293 | void | |
294 | fatal (message) | |
5c0b76c1 | 295 | char *message; |
e19bdc14 RS |
296 | { |
297 | fprintf (stderr, "%s: %s\n", progname, message); | |
298 | exit (BAD); | |
299 | } | |
300 |