61 строка
1.3 KiB
C
61 строка
1.3 KiB
C
#include <stdlib.h>
|
|
#include "strbuf.h"
|
|
#include "quote.h"
|
|
#include "util.h"
|
|
|
|
/* Help to copy the thing properly quoted for the shell safety.
|
|
* any single quote is replaced with '\'', any exclamation point
|
|
* is replaced with '\!', and the whole thing is enclosed in a
|
|
*
|
|
* E.g.
|
|
* original sq_quote result
|
|
* name ==> name ==> 'name'
|
|
* a b ==> a b ==> 'a b'
|
|
* a'b ==> a'\''b ==> 'a'\''b'
|
|
* a!b ==> a'\!'b ==> 'a'\!'b'
|
|
*/
|
|
static inline int need_bs_quote(char c)
|
|
{
|
|
return (c == '\'' || c == '!');
|
|
}
|
|
|
|
static int sq_quote_buf(struct strbuf *dst, const char *src)
|
|
{
|
|
char *to_free = NULL;
|
|
int ret;
|
|
|
|
if (dst->buf == src)
|
|
to_free = strbuf_detach(dst, NULL);
|
|
|
|
ret = strbuf_addch(dst, '\'');
|
|
while (!ret && *src) {
|
|
size_t len = strcspn(src, "'!");
|
|
ret = strbuf_add(dst, src, len);
|
|
src += len;
|
|
while (!ret && need_bs_quote(*src))
|
|
ret = strbuf_addf(dst, "'\\%c\'", *src++);
|
|
}
|
|
if (!ret)
|
|
ret = strbuf_addch(dst, '\'');
|
|
free(to_free);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
|
|
{
|
|
int i, ret;
|
|
|
|
/* Copy into destination buffer. */
|
|
ret = strbuf_grow(dst, 255);
|
|
for (i = 0; !ret && argv[i]; ++i) {
|
|
ret = strbuf_addch(dst, ' ');
|
|
if (ret)
|
|
break;
|
|
ret = sq_quote_buf(dst, argv[i]);
|
|
if (maxlen && dst->len > maxlen)
|
|
return -ENOSPC;
|
|
}
|
|
return ret;
|
|
}
|