Commit | Line | Data |
---|---|---|
80a00278 KT |
1 | /* |
2 | * determine type of file | |
3 | */ | |
4 | ||
5 | #include <sys/param.h> | |
6 | #include <sys/stat.h> | |
7 | #include <stdio.h> | |
8 | #include <ctype.h> | |
9 | int in; | |
10 | int i = 0; | |
11 | char buf[512]; | |
12 | char *fort[] = { | |
13 | "function","subroutine","common","dimension","block","integer", | |
14 | "real","data","double",0}; | |
15 | char *asc[] = { | |
16 | "sys","mov","tst","clr","jmp",0}; | |
17 | char *c[] = { | |
18 | "int","char","float","double","struct","extern",0}; | |
19 | char *as[] = { | |
20 | "globl","byte","even","text","data","bss","comm",0}; | |
21 | int ifile; | |
22 | ||
23 | main(argc, argv) | |
24 | char **argv; | |
25 | { | |
26 | FILE *fl; | |
27 | register char *p; | |
28 | char ap[128]; | |
29 | ||
30 | if (argc>1 && argv[1][0]=='-' && argv[1][1]=='f') { | |
31 | if ((fl = fopen(argv[2], "r")) == NULL) { | |
32 | printf("Can't open %s\n", argv[2]); | |
33 | exit(2); | |
34 | } | |
35 | while ((p = fgets(ap, 128, fl)) != NULL) { | |
36 | int l = strlen(p); | |
37 | if (l>0) | |
38 | p[l-1] = '\0'; | |
39 | printf("%s: ", p); | |
40 | type(p); | |
41 | if (ifile>=0) | |
42 | close(ifile); | |
43 | } | |
44 | exit(1); | |
45 | } | |
46 | while(argc > 1) { | |
47 | printf("%s: ", argv[1]); | |
48 | type(argv[1]); | |
49 | argc--; | |
50 | argv++; | |
51 | if (ifile >= 0) | |
52 | close(ifile); | |
53 | } | |
54 | } | |
55 | ||
56 | type(file) | |
57 | char *file; | |
58 | { | |
59 | int j,nl; | |
60 | char ch; | |
61 | struct stat mbuf; | |
62 | ||
63 | ifile = -1; | |
64 | if(stat(file, &mbuf) < 0) { | |
65 | printf("cannot stat\n"); | |
66 | return; | |
67 | } | |
68 | switch (mbuf.st_mode & S_IFMT) { | |
69 | ||
70 | case S_IFCHR: | |
71 | printf("character"); | |
72 | goto spcl; | |
73 | ||
74 | case S_IFDIR: | |
75 | printf("directory\n"); | |
76 | return; | |
77 | ||
78 | case S_IFBLK: | |
79 | printf("block"); | |
80 | ||
81 | spcl: | |
82 | printf(" special (%d/%d)\n", major(mbuf.st_rdev), minor(mbuf.st_rdev)); | |
83 | return; | |
84 | } | |
85 | ||
86 | ifile = open(file, 0); | |
87 | if(ifile < 0) { | |
88 | printf("cannot open\n"); | |
89 | return; | |
90 | } | |
91 | in = read(ifile, buf, 512); | |
92 | if(in == 0){ | |
93 | printf("empty\n"); | |
94 | return; | |
95 | } | |
96 | switch(*(int *)buf) { | |
97 | ||
98 | case 0410: | |
99 | printf("pure "); | |
100 | goto exec; | |
101 | ||
102 | case 0411: | |
103 | printf("separate "); | |
104 | ||
105 | case 0407: | |
106 | exec: | |
107 | printf("executable"); | |
108 | if(((int *)buf)[4] != 0) | |
109 | printf(" not stripped"); | |
110 | printf("\n"); | |
111 | goto out; | |
112 | ||
113 | case 0177555: | |
114 | printf("old archive\n"); | |
115 | goto out; | |
116 | ||
117 | case 0177545: | |
118 | printf("archive\n"); | |
119 | goto out; | |
120 | } | |
121 | ||
122 | i = 0; | |
123 | if(ccom() == 0)goto notc; | |
124 | while(buf[i] == '#'){ | |
125 | j = i; | |
126 | while(buf[i++] != '\n'){ | |
127 | if(i - j > 255){ | |
128 | printf("data\n"); | |
129 | goto out; | |
130 | } | |
131 | if(i >= in)goto notc; | |
132 | } | |
133 | if(ccom() == 0)goto notc; | |
134 | } | |
135 | check: | |
136 | if(lookup(c) == 1){ | |
137 | while((ch = buf[i++]) != ';' && ch != '{')if(i >= in)goto notc; | |
138 | printf("c program text"); | |
139 | goto outa; | |
140 | } | |
141 | nl = 0; | |
142 | while(buf[i] != '('){ | |
143 | if(buf[i] <= 0) | |
144 | goto notas; | |
145 | if(buf[i] == ';'){ | |
146 | i++; | |
147 | goto check; | |
148 | } | |
149 | if(buf[i++] == '\n') | |
150 | if(nl++ > 6)goto notc; | |
151 | if(i >= in)goto notc; | |
152 | } | |
153 | while(buf[i] != ')'){ | |
154 | if(buf[i++] == '\n') | |
155 | if(nl++ > 6)goto notc; | |
156 | if(i >= in)goto notc; | |
157 | } | |
158 | while(buf[i] != '{'){ | |
159 | if(buf[i++] == '\n') | |
160 | if(nl++ > 6)goto notc; | |
161 | if(i >= in)goto notc; | |
162 | } | |
163 | printf("c program text"); | |
164 | goto outa; | |
165 | notc: | |
166 | i = 0; | |
167 | while(buf[i] == 'c' || buf[i] == '#'){ | |
168 | while(buf[i++] != '\n')if(i >= in)goto notfort; | |
169 | } | |
170 | if(lookup(fort) == 1){ | |
171 | printf("fortran program text"); | |
172 | goto outa; | |
173 | } | |
174 | notfort: | |
175 | i=0; | |
176 | if(ascom() == 0)goto notas; | |
177 | j = i-1; | |
178 | if(buf[i] == '.'){ | |
179 | i++; | |
180 | if(lookup(as) == 1){ | |
181 | printf("assembler program text"); | |
182 | goto outa; | |
183 | } | |
184 | else if(buf[j] == '\n' && isalpha(buf[j+2])){ | |
185 | printf("roff, nroff, or eqn input text"); | |
186 | goto outa; | |
187 | } | |
188 | } | |
189 | while(lookup(asc) == 0){ | |
190 | if(ascom() == 0)goto notas; | |
191 | while(buf[i] != '\n' && buf[i++] != ':') | |
192 | if(i >= in)goto notas; | |
193 | while(buf[i] == '\n' || buf[i] == ' ' || buf[i] == '\t')if(i++ >= in)goto notas; | |
194 | j = i-1; | |
195 | if(buf[i] == '.'){ | |
196 | i++; | |
197 | if(lookup(as) == 1){ | |
198 | printf("assembler program text"); | |
199 | goto outa; | |
200 | } | |
201 | else if(buf[j] == '\n' && isalpha(buf[j+2])){ | |
202 | printf("roff, nroff, or eqn input text"); | |
203 | goto outa; | |
204 | } | |
205 | } | |
206 | } | |
207 | printf("assembler program text"); | |
208 | goto outa; | |
209 | notas: | |
210 | for(i=0; i < in; i++)if(buf[i]&0200){ | |
211 | if (buf[0]=='\100' && buf[1]=='\357') { | |
212 | printf("troff output\n"); | |
213 | goto out; | |
214 | } | |
215 | printf("data\n"); | |
216 | goto out; | |
217 | } | |
218 | if (mbuf.st_mode&((S_IEXEC)|(S_IEXEC>>3)|(S_IEXEC>>6))) | |
219 | printf("commands text"); | |
220 | else | |
221 | if (english(buf, in)) | |
222 | printf("English text"); | |
223 | else | |
224 | printf("ascii text"); | |
225 | outa: | |
226 | while(i < in) | |
227 | if((buf[i++]&0377) > 127){ | |
228 | printf(" with garbage\n"); | |
229 | goto out; | |
230 | } | |
231 | /* if next few lines in then read whole file looking for nulls ... | |
232 | while((in = read(ifile,buf,512)) > 0) | |
233 | for(i = 0; i < in; i++) | |
234 | if((buf[i]&0377) > 127){ | |
235 | printf(" with garbage\n"); | |
236 | goto out; | |
237 | } | |
238 | /*.... */ | |
239 | printf("\n"); | |
240 | out:; | |
241 | } | |
242 | lookup(tab) | |
243 | char *tab[]; | |
244 | { | |
245 | char r; | |
246 | int k,j,l; | |
247 | while(buf[i] == ' ' || buf[i] == '\t' || buf[i] == '\n')i++; | |
248 | for(j=0; tab[j] != 0; j++){ | |
249 | l=0; | |
250 | for(k=i; ((r=tab[j][l++]) == buf[k] && r != '\0');k++); | |
251 | if(r == '\0') | |
252 | if(buf[k] == ' ' || buf[k] == '\n' || buf[k] == '\t' | |
253 | || buf[k] == '{' || buf[k] == '/'){ | |
254 | i=k; | |
255 | return(1); | |
256 | } | |
257 | } | |
258 | return(0); | |
259 | } | |
260 | ccom(){ | |
261 | char cc; | |
262 | while((cc = buf[i]) == ' ' || cc == '\t' || cc == '\n')if(i++ >= in)return(0); | |
263 | if(buf[i] == '/' && buf[i+1] == '*'){ | |
264 | i += 2; | |
265 | while(buf[i] != '*' || buf[i+1] != '/'){ | |
266 | if(buf[i] == '\\')i += 2; | |
267 | else i++; | |
268 | if(i >= in)return(0); | |
269 | } | |
270 | if((i += 2) >= in)return(0); | |
271 | } | |
272 | if(buf[i] == '\n')if(ccom() == 0)return(0); | |
273 | return(1); | |
274 | } | |
275 | ascom(){ | |
276 | while(buf[i] == '/'){ | |
277 | i++; | |
278 | while(buf[i++] != '\n')if(i >= in)return(0); | |
279 | while(buf[i] == '\n')if(i++ >= in)return(0); | |
280 | } | |
281 | return(1); | |
282 | } | |
283 | ||
284 | english (bp, n) | |
285 | char *bp; | |
286 | { | |
287 | # define NASC 128 | |
288 | int ct[NASC], j, vow, freq, rare; | |
289 | int badpun = 0, punct = 0; | |
290 | if (n<50) return(0); /* no point in statistics on squibs */ | |
291 | for(j=0; j<NASC; j++) | |
292 | ct[j]=0; | |
293 | for(j=0; j<n; j++) | |
294 | { | |
295 | if (bp[j]<NASC) | |
296 | ct[bp[j]|040]++; | |
297 | switch (bp[j]) | |
298 | { | |
299 | case '.': | |
300 | case ',': | |
301 | case ')': | |
302 | case '%': | |
303 | case ';': | |
304 | case ':': | |
305 | case '?': | |
306 | punct++; | |
307 | if ( j < n-1 && | |
308 | bp[j+1] != ' ' && | |
309 | bp[j+1] != '\n') | |
310 | badpun++; | |
311 | } | |
312 | } | |
313 | if (badpun*5 > punct) | |
314 | return(0); | |
315 | vow = ct['a'] + ct['e'] + ct['i'] + ct['o'] + ct['u']; | |
316 | freq = ct['e'] + ct['t'] + ct['a'] + ct['i'] + ct['o'] + ct['n']; | |
317 | rare = ct['v'] + ct['j'] + ct['k'] + ct['q'] + ct['x'] + ct['z']; | |
318 | if (2*ct[';'] > ct['e']) return(0); | |
319 | if ( (ct['>']+ct['<']+ct['/'])>ct['e']) return(0); /* shell file test */ | |
320 | return (vow*5 >= n-ct[' '] && freq >= 10*rare); | |
321 | } |