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// SPDX-License-Identifier: GPL-2.0
#include <errno.h>
#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;
}
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