quote.h

   1 #ifndef QUOTE_H
   2 #define QUOTE_H
   3
   4 #include <stddef.h>
   5 #include <stdio.h>
   6
   7 /* Help to copy the thing properly quoted for the shell safety.
   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.
  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.
  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.
  29  */
  30
  31 extern void sq_quote_print(FILE *stream, const char *src);
  32
  33 extern void sq_quote_buf(struct strbuf *, const char *src);
  34 extern void sq_quote_argv(struct strbuf *, const char **argv, size_t maxlen);
  35
  36 /* This unwraps what sq_quote() produces in place, but returns
  37  * NULL if the input does not look like what sq_quote would have
  38  * produced.
  39  */
  40 extern char *sq_dequote(char *);
  41
  42 /*
  43  * Same as the above, but can be used to unwrap many arguments in the
  44  * same string separated by space. "next" is changed to point to the
  45  * next argument that should be passed as first parameter. When there
  46  * is no more argument to be dequoted, "next" is updated to point to NULL.
  47  */
  48 extern char *sq_dequote_step(char *arg, char **next);
  49 extern int sq_dequote_to_argv(char *arg, const char ***argv, int *nr, int *alloc);
  50
  51 extern int unquote_c_style(struct strbuf *, const char *quoted, const char **endp);
  52 extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq);
  53 extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
  54
  55 extern void write_name_quoted(const char *name, FILE *, int terminator);
  56 extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
  57                                  const char *name, FILE *, int terminator);
  58
  59 /* quote path as relative to the given prefix */
  60 char *quote_path_relative(const char *in, int len,
  61                           struct strbuf *out, const char *prefix);
  62
  63 /* quoting as a string literal for other languages */
  64 extern void perl_quote_print(FILE *stream, const char *src);
  65 extern void python_quote_print(FILE *stream, const char *src);
  66 extern void tcl_quote_print(FILE *stream, const char *src);
  67
  68 #endif