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07800601 IM |
1 | #include "cache.h" |
2 | #include "quote.h" | |
3 | ||
07800601 IM |
4 | /* Help to copy the thing properly quoted for the shell safety. |
5 | * any single quote is replaced with '\'', any exclamation point | |
6 | * is replaced with '\!', and the whole thing is enclosed in a | |
7 | * | |
8 | * E.g. | |
9 | * original sq_quote result | |
10 | * name ==> name ==> 'name' | |
11 | * a b ==> a b ==> 'a b' | |
12 | * a'b ==> a'\''b ==> 'a'\''b' | |
13 | * a!b ==> a'\!'b ==> 'a'\!'b' | |
14 | */ | |
15 | static inline int need_bs_quote(char c) | |
16 | { | |
17 | return (c == '\'' || c == '!'); | |
18 | } | |
19 | ||
a41794cd | 20 | static void sq_quote_buf(struct strbuf *dst, const char *src) |
07800601 IM |
21 | { |
22 | char *to_free = NULL; | |
23 | ||
24 | if (dst->buf == src) | |
25 | to_free = strbuf_detach(dst, NULL); | |
26 | ||
27 | strbuf_addch(dst, '\''); | |
28 | while (*src) { | |
29 | size_t len = strcspn(src, "'!"); | |
30 | strbuf_add(dst, src, len); | |
31 | src += len; | |
32 | while (need_bs_quote(*src)) { | |
33 | strbuf_addstr(dst, "'\\"); | |
34 | strbuf_addch(dst, *src++); | |
35 | strbuf_addch(dst, '\''); | |
36 | } | |
37 | } | |
38 | strbuf_addch(dst, '\''); | |
39 | free(to_free); | |
40 | } | |
41 | ||
07800601 IM |
42 | void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen) |
43 | { | |
44 | int i; | |
45 | ||
46 | /* Copy into destination buffer. */ | |
47 | strbuf_grow(dst, 255); | |
48 | for (i = 0; argv[i]; ++i) { | |
49 | strbuf_addch(dst, ' '); | |
50 | sq_quote_buf(dst, argv[i]); | |
51 | if (maxlen && dst->len > maxlen) | |
52 | die("Too many or long arguments"); | |
53 | } | |
54 | } |