Andrew's git - gitweb.git/blob

   1#include "cache.h"
   2#include "quote.h"
   3
   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#define EMIT(x) ( (++len < n) && (*bp++ = (x)) )
  16
  17size_t sq_quote_buf(char *dst, size_t n, const char *src)
  18{
  19        char c;
  20        char *bp = dst;
  21        size_t len = 0;
  22
  23        EMIT('\'');
  24        while ((c = *src++)) {
  25                if (c == '\'' || c == '!') {
  26                        EMIT('\'');
  27                        EMIT('\\');
  28                        EMIT(c);
  29                        EMIT('\'');
  30                } else {
  31                        EMIT(c);
  32                }
  33        }
  34        EMIT('\'');
  35
  36        if ( n )
  37                *bp = 0;
  38
  39        return len;
  40}
  41
  42char *sq_quote(const char *src)
  43{
  44        char *buf;
  45        size_t cnt;
  46
  47        cnt = sq_quote_buf(NULL, 0, src) + 1;
  48        buf = xmalloc(cnt);
  49        sq_quote_buf(buf, cnt, src);
  50
  51        return buf;
  52}
  53