71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
|
/* Part of libhgfs - (c) 2009, D.C. van Moolenbroek */
|
||
|
|
|
||
|
|
#include "inc.h"
|
||
|
|
|
||
|
|
#include <limits.h>
|
||
|
|
|
||
|
|
/*===========================================================================*
|
||
|
|
* path_put *
|
||
|
|
*===========================================================================*/
|
||
|
|
void path_put(char *path)
|
||
|
|
{
|
||
|
|
/* Append the given path name in HGFS format to the RPC buffer. Truncate it
|
||
|
|
* if it is longer than PATH_MAX bytes.
|
||
|
|
*/
|
||
|
|
char *p, buf[PATH_MAX];
|
||
|
|
int len;
|
||
|
|
|
||
|
|
/* No leading slashes are allowed. */
|
||
|
|
for (p = path; *p == '/'; p++);
|
||
|
|
|
||
|
|
/* No double or tailing slashes, either. */
|
||
|
|
for (len = 0; *p && len < sizeof(buf) - 1; len++) {
|
||
|
|
if (*p == '/') {
|
||
|
|
for (p++; *p == '/'; p++);
|
||
|
|
|
||
|
|
if (!*p) break;
|
||
|
|
|
||
|
|
buf[len] = 0;
|
||
|
|
}
|
||
|
|
else buf[len] = *p++;
|
||
|
|
}
|
||
|
|
|
||
|
|
RPC_NEXT32 = len;
|
||
|
|
|
||
|
|
memcpy(RPC_PTR, buf, len);
|
||
|
|
RPC_ADVANCE(len);
|
||
|
|
|
||
|
|
RPC_NEXT8 = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*===========================================================================*
|
||
|
|
* path_get *
|
||
|
|
*===========================================================================*/
|
||
|
|
int path_get(char *path, int max)
|
||
|
|
{
|
||
|
|
/* Retrieve a HGFS formatted path name from the RPC buffer. Returns EINVAL if
|
||
|
|
* the path name is invalid. Returns ENAMETOOLONG if the path name is too
|
||
|
|
* long. Returns OK on success.
|
||
|
|
*/
|
||
|
|
char *p, *q;
|
||
|
|
int n, len;
|
||
|
|
|
||
|
|
n = len = RPC_NEXT32;
|
||
|
|
|
||
|
|
if (len >= max) return ENAMETOOLONG;
|
||
|
|
|
||
|
|
for (p = path, q = RPC_PTR; n--; p++, q++) {
|
||
|
|
/* We can not deal with a slash in a path component. */
|
||
|
|
if (*q == '/') return EINVAL;
|
||
|
|
|
||
|
|
if (*q == 0) *p = '/';
|
||
|
|
else *p = *q;
|
||
|
|
}
|
||
|
|
|
||
|
|
RPC_ADVANCE(len);
|
||
|
|
|
||
|
|
*p = 0;
|
||
|
|
|
||
|
|
return (RPC_NEXT8 != 0) ? EINVAL : OK;
|
||
|
|
}
|