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Commit | Line | Data |
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6fb737be JH |
1 | #include "cache.h" |
2 | #include "quote.h" | |
3 | ||
5b8e6f85 DP |
4 | int quote_path_fully = 1; |
5 | ||
6fb737be | 6 | /* Help to copy the thing properly quoted for the shell safety. |
77d604c3 PA |
7 | * any single quote is replaced with '\'', any exclamation point |
8 | * is replaced with '\!', and the whole thing is enclosed in a | |
6fb737be JH |
9 | * |
10 | * E.g. | |
11 | * original sq_quote result | |
12 | * name ==> name ==> 'name' | |
13 | * a b ==> a b ==> 'a b' | |
14 | * a'b ==> a'\''b ==> 'a'\''b' | |
77d604c3 | 15 | * a!b ==> a'\!'b ==> 'a'\!'b' |
6fb737be | 16 | */ |
35eb2d36 LT |
17 | static inline int need_bs_quote(char c) |
18 | { | |
19 | return (c == '\'' || c == '!'); | |
20 | } | |
21 | ||
7a33bcbe | 22 | void sq_quote_buf(struct strbuf *dst, const char *src) |
77d604c3 | 23 | { |
7a33bcbe PH |
24 | char *to_free = NULL; |
25 | ||
26 | if (dst->buf == src) | |
b315c5c0 | 27 | to_free = strbuf_detach(dst, NULL); |
7a33bcbe PH |
28 | |
29 | strbuf_addch(dst, '\''); | |
30 | while (*src) { | |
c2015b3a | 31 | size_t len = strcspn(src, "'!"); |
7a33bcbe PH |
32 | strbuf_add(dst, src, len); |
33 | src += len; | |
34 | while (need_bs_quote(*src)) { | |
35 | strbuf_addstr(dst, "'\\"); | |
36 | strbuf_addch(dst, *src++); | |
37 | strbuf_addch(dst, '\''); | |
6fb737be JH |
38 | } |
39 | } | |
7a33bcbe PH |
40 | strbuf_addch(dst, '\''); |
41 | free(to_free); | |
77d604c3 PA |
42 | } |
43 | ||
575ba9d6 ML |
44 | void sq_quote_print(FILE *stream, const char *src) |
45 | { | |
46 | char c; | |
47 | ||
48 | fputc('\'', stream); | |
49 | while ((c = *src++)) { | |
50 | if (need_bs_quote(c)) { | |
51 | fputs("'\\", stream); | |
52 | fputc(c, stream); | |
53 | fputc('\'', stream); | |
54 | } else { | |
55 | fputc(c, stream); | |
56 | } | |
57 | } | |
58 | fputc('\'', stream); | |
59 | } | |
60 | ||
b319ce4c | 61 | void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen) |
7cf67205 | 62 | { |
7cf67205 | 63 | int i; |
7cf67205 | 64 | |
7cf67205 | 65 | /* Copy into destination buffer. */ |
b319ce4c CC |
66 | strbuf_grow(dst, 255); |
67 | for (i = 0; argv[i]; ++i) { | |
7a33bcbe PH |
68 | strbuf_addch(dst, ' '); |
69 | sq_quote_buf(dst, argv[i]); | |
70 | if (maxlen && dst->len > maxlen) | |
71 | die("Too many or long arguments"); | |
7cf67205 | 72 | } |
86257aa3 CC |
73 | } |
74 | ||
35eb2d36 LT |
75 | char *sq_dequote(char *arg) |
76 | { | |
77 | char *dst = arg; | |
78 | char *src = arg; | |
79 | char c; | |
80 | ||
81 | if (*src != '\'') | |
82 | return NULL; | |
83 | for (;;) { | |
84 | c = *++src; | |
85 | if (!c) | |
86 | return NULL; | |
87 | if (c != '\'') { | |
88 | *dst++ = c; | |
89 | continue; | |
90 | } | |
91 | /* We stepped out of sq */ | |
92 | switch (*++src) { | |
93 | case '\0': | |
94 | *dst = 0; | |
95 | return arg; | |
96 | case '\\': | |
97 | c = *++src; | |
98 | if (need_bs_quote(c) && *++src == '\'') { | |
99 | *dst++ = c; | |
100 | continue; | |
101 | } | |
102 | /* Fallthrough */ | |
103 | default: | |
104 | return NULL; | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
663af342 PH |
109 | /* 1 means: quote as octal |
110 | * 0 means: quote as octal if (quote_path_fully) | |
111 | * -1 means: never quote | |
112 | * c: quote as "\\c" | |
113 | */ | |
114 | #define X8(x) x, x, x, x, x, x, x, x | |
115 | #define X16(x) X8(x), X8(x) | |
116 | static signed char const sq_lookup[256] = { | |
117 | /* 0 1 2 3 4 5 6 7 */ | |
118 | /* 0x00 */ 1, 1, 1, 1, 1, 1, 1, 'a', | |
119 | /* 0x08 */ 'b', 't', 'n', 'v', 'f', 'r', 1, 1, | |
120 | /* 0x10 */ X16(1), | |
121 | /* 0x20 */ -1, -1, '"', -1, -1, -1, -1, -1, | |
122 | /* 0x28 */ X16(-1), X16(-1), X16(-1), | |
123 | /* 0x58 */ -1, -1, -1, -1,'\\', -1, -1, -1, | |
124 | /* 0x60 */ X16(-1), X8(-1), | |
125 | /* 0x78 */ -1, -1, -1, -1, -1, -1, -1, 1, | |
126 | /* 0x80 */ /* set to 0 */ | |
127 | }; | |
128 | ||
f3fa1838 JH |
129 | static inline int sq_must_quote(char c) |
130 | { | |
663af342 PH |
131 | return sq_lookup[(unsigned char)c] + quote_path_fully > 0; |
132 | } | |
133 | ||
134 | /* returns the longest prefix not needing a quote up to maxlen if positive. | |
135 | This stops at the first \0 because it's marked as a character needing an | |
136 | escape */ | |
137 | static size_t next_quote_pos(const char *s, ssize_t maxlen) | |
138 | { | |
139 | size_t len; | |
140 | if (maxlen < 0) { | |
141 | for (len = 0; !sq_must_quote(s[len]); len++); | |
142 | } else { | |
143 | for (len = 0; len < maxlen && !sq_must_quote(s[len]); len++); | |
144 | } | |
145 | return len; | |
146 | } | |
147 | ||
4f6fbcdc JH |
148 | /* |
149 | * C-style name quoting. | |
150 | * | |
663af342 PH |
151 | * (1) if sb and fp are both NULL, inspect the input name and counts the |
152 | * number of bytes that are needed to hold c_style quoted version of name, | |
153 | * counting the double quotes around it but not terminating NUL, and | |
154 | * returns it. | |
155 | * However, if name does not need c_style quoting, it returns 0. | |
4f6fbcdc | 156 | * |
663af342 PH |
157 | * (2) if sb or fp are not NULL, it emits the c_style quoted version |
158 | * of name, enclosed with double quotes if asked and needed only. | |
159 | * Return value is the same as in (1). | |
4f6fbcdc | 160 | */ |
663af342 PH |
161 | static size_t quote_c_style_counted(const char *name, ssize_t maxlen, |
162 | struct strbuf *sb, FILE *fp, int no_dq) | |
4f6fbcdc JH |
163 | { |
164 | #undef EMIT | |
663af342 PH |
165 | #define EMIT(c) \ |
166 | do { \ | |
167 | if (sb) strbuf_addch(sb, (c)); \ | |
168 | if (fp) fputc((c), fp); \ | |
169 | count++; \ | |
170 | } while (0) | |
171 | #define EMITBUF(s, l) \ | |
172 | do { \ | |
173 | if (sb) strbuf_add(sb, (s), (l)); \ | |
174 | if (fp) fwrite((s), (l), 1, fp); \ | |
175 | count += (l); \ | |
176 | } while (0) | |
177 | ||
178 | size_t len, count = 0; | |
179 | const char *p = name; | |
4f6fbcdc | 180 | |
663af342 PH |
181 | for (;;) { |
182 | int ch; | |
4f6fbcdc | 183 | |
663af342 PH |
184 | len = next_quote_pos(p, maxlen); |
185 | if (len == maxlen || !p[len]) | |
50e7b067 | 186 | break; |
663af342 PH |
187 | |
188 | if (!no_dq && p == name) | |
189 | EMIT('"'); | |
190 | ||
191 | EMITBUF(p, len); | |
192 | EMIT('\\'); | |
193 | p += len; | |
194 | ch = (unsigned char)*p++; | |
195 | if (sq_lookup[ch] >= ' ') { | |
196 | EMIT(sq_lookup[ch]); | |
197 | } else { | |
198 | EMIT(((ch >> 6) & 03) + '0'); | |
199 | EMIT(((ch >> 3) & 07) + '0'); | |
200 | EMIT(((ch >> 0) & 07) + '0'); | |
4f6fbcdc | 201 | } |
4f6fbcdc | 202 | } |
663af342 PH |
203 | |
204 | EMITBUF(p, len); | |
205 | if (p == name) /* no ending quote needed */ | |
206 | return 0; | |
207 | ||
4f6fbcdc JH |
208 | if (!no_dq) |
209 | EMIT('"'); | |
663af342 PH |
210 | return count; |
211 | } | |
4f6fbcdc | 212 | |
663af342 PH |
213 | size_t quote_c_style(const char *name, struct strbuf *sb, FILE *fp, int nodq) |
214 | { | |
215 | return quote_c_style_counted(name, -1, sb, fp, nodq); | |
4f6fbcdc JH |
216 | } |
217 | ||
d5625091 JH |
218 | void quote_two_c_style(struct strbuf *sb, const char *prefix, const char *path, int nodq) |
219 | { | |
220 | if (quote_c_style(prefix, NULL, NULL, 0) || | |
221 | quote_c_style(path, NULL, NULL, 0)) { | |
222 | if (!nodq) | |
223 | strbuf_addch(sb, '"'); | |
224 | quote_c_style(prefix, sb, NULL, 1); | |
225 | quote_c_style(path, sb, NULL, 1); | |
226 | if (!nodq) | |
227 | strbuf_addch(sb, '"'); | |
228 | } else { | |
229 | strbuf_addstr(sb, prefix); | |
230 | strbuf_addstr(sb, path); | |
231 | } | |
232 | } | |
233 | ||
663af342 | 234 | void write_name_quoted(const char *name, FILE *fp, int terminator) |
9ef2b3cb | 235 | { |
663af342 PH |
236 | if (terminator) { |
237 | quote_c_style(name, NULL, fp, 0); | |
238 | } else { | |
239 | fputs(name, fp); | |
240 | } | |
241 | fputc(terminator, fp); | |
242 | } | |
243 | ||
244 | extern void write_name_quotedpfx(const char *pfx, size_t pfxlen, | |
245 | const char *name, FILE *fp, int terminator) | |
246 | { | |
247 | int needquote = 0; | |
248 | ||
249 | if (terminator) { | |
250 | needquote = next_quote_pos(pfx, pfxlen) < pfxlen | |
251 | || name[next_quote_pos(name, -1)]; | |
252 | } | |
253 | if (needquote) { | |
254 | fputc('"', fp); | |
255 | quote_c_style_counted(pfx, pfxlen, NULL, fp, 1); | |
256 | quote_c_style(name, NULL, fp, 1); | |
257 | fputc('"', fp); | |
258 | } else { | |
259 | fwrite(pfx, pfxlen, 1, fp); | |
260 | fputs(name, fp); | |
261 | } | |
262 | fputc(terminator, fp); | |
9ef2b3cb JH |
263 | } |
264 | ||
a734d0b1 DP |
265 | /* quote path as relative to the given prefix */ |
266 | char *quote_path_relative(const char *in, int len, | |
267 | struct strbuf *out, const char *prefix) | |
268 | { | |
269 | int needquote; | |
270 | ||
271 | if (len < 0) | |
272 | len = strlen(in); | |
273 | ||
274 | /* "../" prefix itself does not need quoting, but "in" might. */ | |
275 | needquote = next_quote_pos(in, len) < len; | |
276 | strbuf_setlen(out, 0); | |
277 | strbuf_grow(out, len); | |
278 | ||
279 | if (needquote) | |
280 | strbuf_addch(out, '"'); | |
281 | if (prefix) { | |
282 | int off = 0; | |
283 | while (prefix[off] && off < len && prefix[off] == in[off]) | |
284 | if (prefix[off] == '/') { | |
285 | prefix += off + 1; | |
286 | in += off + 1; | |
287 | len -= off + 1; | |
288 | off = 0; | |
289 | } else | |
290 | off++; | |
291 | ||
292 | for (; *prefix; prefix++) | |
293 | if (*prefix == '/') | |
294 | strbuf_addstr(out, "../"); | |
295 | } | |
296 | ||
297 | quote_c_style_counted (in, len, out, NULL, 1); | |
298 | ||
299 | if (needquote) | |
300 | strbuf_addch(out, '"'); | |
301 | if (!out->len) | |
302 | strbuf_addstr(out, "./"); | |
303 | ||
304 | return out->buf; | |
305 | } | |
306 | ||
4f6fbcdc JH |
307 | /* |
308 | * C-style name unquoting. | |
309 | * | |
7fb1011e PH |
310 | * Quoted should point at the opening double quote. |
311 | * + Returns 0 if it was able to unquote the string properly, and appends the | |
312 | * result in the strbuf `sb'. | |
313 | * + Returns -1 in case of error, and doesn't touch the strbuf. Though note | |
314 | * that this function will allocate memory in the strbuf, so calling | |
315 | * strbuf_release is mandatory whichever result unquote_c_style returns. | |
316 | * | |
317 | * Updates endp pointer to point at one past the ending double quote if given. | |
4f6fbcdc | 318 | */ |
7fb1011e | 319 | int unquote_c_style(struct strbuf *sb, const char *quoted, const char **endp) |
4f6fbcdc | 320 | { |
7fb1011e PH |
321 | size_t oldlen = sb->len, len; |
322 | int ch, ac; | |
4f6fbcdc JH |
323 | |
324 | if (*quoted++ != '"') | |
7fb1011e PH |
325 | return -1; |
326 | ||
327 | for (;;) { | |
328 | len = strcspn(quoted, "\"\\"); | |
329 | strbuf_add(sb, quoted, len); | |
330 | quoted += len; | |
4f6fbcdc | 331 | |
7fb1011e PH |
332 | switch (*quoted++) { |
333 | case '"': | |
334 | if (endp) | |
c8744d6a | 335 | *endp = quoted; |
7fb1011e PH |
336 | return 0; |
337 | case '\\': | |
338 | break; | |
339 | default: | |
340 | goto error; | |
341 | } | |
342 | ||
343 | switch ((ch = *quoted++)) { | |
344 | case 'a': ch = '\a'; break; | |
345 | case 'b': ch = '\b'; break; | |
346 | case 'f': ch = '\f'; break; | |
347 | case 'n': ch = '\n'; break; | |
348 | case 'r': ch = '\r'; break; | |
349 | case 't': ch = '\t'; break; | |
350 | case 'v': ch = '\v'; break; | |
351 | ||
352 | case '\\': case '"': | |
353 | break; /* verbatim */ | |
354 | ||
355 | /* octal values with first digit over 4 overflow */ | |
356 | case '0': case '1': case '2': case '3': | |
4f6fbcdc | 357 | ac = ((ch - '0') << 6); |
7fb1011e PH |
358 | if ((ch = *quoted++) < '0' || '7' < ch) |
359 | goto error; | |
4f6fbcdc | 360 | ac |= ((ch - '0') << 3); |
7fb1011e PH |
361 | if ((ch = *quoted++) < '0' || '7' < ch) |
362 | goto error; | |
4f6fbcdc JH |
363 | ac |= (ch - '0'); |
364 | ch = ac; | |
365 | break; | |
366 | default: | |
7fb1011e | 367 | goto error; |
4f6fbcdc | 368 | } |
7fb1011e | 369 | strbuf_addch(sb, ch); |
4f6fbcdc JH |
370 | } |
371 | ||
7fb1011e PH |
372 | error: |
373 | strbuf_setlen(sb, oldlen); | |
374 | return -1; | |
4f6fbcdc JH |
375 | } |
376 | ||
9f613ddd JH |
377 | /* quoting as a string literal for other languages */ |
378 | ||
379 | void perl_quote_print(FILE *stream, const char *src) | |
380 | { | |
381 | const char sq = '\''; | |
382 | const char bq = '\\'; | |
383 | char c; | |
384 | ||
385 | fputc(sq, stream); | |
386 | while ((c = *src++)) { | |
387 | if (c == sq || c == bq) | |
388 | fputc(bq, stream); | |
389 | fputc(c, stream); | |
390 | } | |
391 | fputc(sq, stream); | |
392 | } | |
393 | ||
394 | void python_quote_print(FILE *stream, const char *src) | |
395 | { | |
396 | const char sq = '\''; | |
397 | const char bq = '\\'; | |
398 | const char nl = '\n'; | |
399 | char c; | |
400 | ||
401 | fputc(sq, stream); | |
402 | while ((c = *src++)) { | |
403 | if (c == nl) { | |
404 | fputc(bq, stream); | |
405 | fputc('n', stream); | |
406 | continue; | |
407 | } | |
408 | if (c == sq || c == bq) | |
409 | fputc(bq, stream); | |
410 | fputc(c, stream); | |
411 | } | |
412 | fputc(sq, stream); | |
413 | } | |
5558e55c SP |
414 | |
415 | void tcl_quote_print(FILE *stream, const char *src) | |
416 | { | |
417 | char c; | |
418 | ||
419 | fputc('"', stream); | |
420 | while ((c = *src++)) { | |
421 | switch (c) { | |
422 | case '[': case ']': | |
423 | case '{': case '}': | |
424 | case '$': case '\\': case '"': | |
425 | fputc('\\', stream); | |
426 | default: | |
427 | fputc(c, stream); | |
428 | break; | |
429 | case '\f': | |
430 | fputs("\\f", stream); | |
431 | break; | |
432 | case '\r': | |
433 | fputs("\\r", stream); | |
434 | break; | |
435 | case '\n': | |
436 | fputs("\\n", stream); | |
437 | break; | |
438 | case '\t': | |
439 | fputs("\\t", stream); | |
440 | break; | |
441 | case '\v': | |
442 | fputs("\\v", stream); | |
443 | break; | |
444 | } | |
445 | } | |
446 | fputc('"', stream); | |
447 | } |