1#ifndef QUOTE_H
2#define QUOTE_H
3
4struct strbuf;
5
6/* Help to copy the thing properly quoted for the shell safety.
7 * any single quote is replaced with '\'', any exclamation point
8 * is replaced with '\!', and the whole thing is enclosed in a
9 * single quote pair.
10 *
11 * For example, if you are passing the result to system() as an
12 * argument:
13 *
14 * sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
15 *
16 * would be appropriate. If the system() is going to call ssh to
17 * run the command on the other side:
18 *
19 * sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
20 * sprintf(rcmd, "ssh %s %s", sq_quote(host), sq_quote(cmd));
21 *
22 * Note that the above examples leak memory! Remember to free result from
23 * sq_quote() in a real application.
24 *
25 * sq_quote_buf() writes to an existing buffer of specified size; it
26 * will return the number of characters that would have been written
27 * excluding the final null regardless of the buffer size.
28 *
29 * sq_quotef() quotes the entire formatted string as a single result.
30 */
31
32extern void sq_quote_buf(struct strbuf *, const char *src);
33extern void sq_quote_argv(struct strbuf *, const char **argv);
34extern void sq_quotef(struct strbuf *, const char *fmt, ...);
35
36/*
37 * These match their non-pretty variants, except that they avoid
38 * quoting when there are no exotic characters. These should only be used for
39 * human-readable output, as sq_dequote() is not smart enough to dequote it.
40 */
41void sq_quote_buf_pretty(struct strbuf *, const char *src);
42void sq_quote_argv_pretty(struct strbuf *, const char **argv);
43
44/* This unwraps what sq_quote() produces in place, but returns
45 * NULL if the input does not look like what sq_quote would have
46 * produced.
47 */
48extern char *sq_dequote(char *);
49
50/*
51 * Same as the above, but can be used to unwrap many arguments in the
52 * same string separated by space. Like sq_quote, it works in place,
53 * modifying arg and appending pointers into it to argv.
54 */
55extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
56
57/*
58 * Same as above, but store the unquoted strings in an argv_array. We will
59 * still modify arg in place, but unlike sq_dequote_to_argv, the argv_array
60 * will duplicate and take ownership of the strings.
61 */
62struct argv_array;
63extern int sq_dequote_to_argv_array(char *arg, struct argv_array *);
64
65extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
66extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
67extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
68
69extern void write_name_quoted(const char *name, FILE *, int terminator);
70extern void write_name_quoted_relative(const char *name, const char *prefix,
71 FILE *fp, int terminator);
72
73/* quote path as relative to the given prefix */
74extern char *quote_path_relative(const char *in, const char *prefix,
75 struct strbuf *out);
76
77/* quoting as a string literal for other languages */
78extern void perl_quote_buf(struct strbuf *sb, const char *src);
79extern void python_quote_buf(struct strbuf *sb, const char *src);
80extern void tcl_quote_buf(struct strbuf *sb, const char *src);
81extern void basic_regex_quote_buf(struct strbuf *sb, const char *src);
82
83#endif
84