Functions to quote and unquote pathnames in C-style.
[git/git.git] / quote.h
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1#ifndef QUOTE_H
2#define QUOTE_H
3
77d604c3 4#include <stddef.h>
4f6fbcdc 5#include <stdio.h>
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6
7/* Help to copy the thing properly quoted for the shell safety.
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8 * any single quote is replaced with '\'', any exclamation point
9 * is replaced with '\!', and the whole thing is enclosed in a
10 * single quote pair.
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11 *
12 * For example, if you are passing the result to system() as an
13 * argument:
14 *
15 * sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
16 *
17 * would be appropriate. If the system() is going to call ssh to
18 * run the command on the other side:
19 *
20 * sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
21 * sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
22 *
23 * Note that the above examples leak memory! Remember to free result from
24 * sq_quote() in a real application.
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25 *
26 * sq_quote_buf() writes to an existing buffer of specified size; it
27 * will return the number of characters that would have been written
28 * excluding the final null regardless of the buffer size.
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29 */
30
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31extern char *sq_quote(const char *src);
32extern size_t sq_quote_buf(char *dst, size_t n, const char *src);
33
34extern int quote_c_style(const char *name, char *outbuf, FILE *outfp,
35 int nodq);
36extern char *unquote_c_style(const char *quoted, const char **endp);
37
38extern void write_name_quoted(const char *prefix, const char *name,
39 int quote, FILE *out);
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40
41#endif