2751142e3c
* spu/jsre.h: Add JSRE_GETCWD.
* spu/getcwd.c: New file, implement getcwd with help from an
assist call.
* spu/Makefile.in: Add getcwd.
110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
|
|
Copyright 2007
|
|
International Business Machines Corporation,
|
|
Sony Computer Entertainment, Incorporated,
|
|
Toshiba Corporation,
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
* Neither the names of the copyright holders nor the names of their
|
|
contributors may be used to endorse or promote products derived from
|
|
this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
|
|
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
|
|
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
|
|
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
|
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
|
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include "jsre.h"
|
|
|
|
#define ALLOC_BASE 64
|
|
#define ALLOC_INCR 64
|
|
|
|
typedef struct
|
|
{
|
|
unsigned int buf;
|
|
unsigned int pad0[3];
|
|
unsigned int size;
|
|
unsigned int pad1[3];
|
|
} syscall_getcwd_t;
|
|
|
|
char *
|
|
getcwd (char *buf, size_t size)
|
|
{
|
|
syscall_getcwd_t sys;
|
|
int retry_alloc, local_alloc;
|
|
char *newbuf;
|
|
char *res;
|
|
|
|
/*
|
|
* Do not let the ppu side allocate memory, since it has to be used on
|
|
* the SPU (must be in LS), and it can't easily be freed on the spu
|
|
* side. So check for NULL buf, handle allocations here, and only call
|
|
* the assist call with a non-NULL buf.
|
|
*/
|
|
retry_alloc = 0;
|
|
local_alloc = 0;
|
|
if (!buf) {
|
|
local_alloc = 1;
|
|
if (size == 0) {
|
|
retry_alloc = 1;
|
|
size = ALLOC_BASE;
|
|
}
|
|
buf = malloc (size);
|
|
if (!buf) {
|
|
/*
|
|
* Leave errno as set by malloc.
|
|
*/
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Let the assist call check for error cases, specifically let it handle
|
|
* non-NULL buf and size of zero.
|
|
*/
|
|
|
|
sys.buf = (unsigned int) buf;
|
|
sys.size = (unsigned int) size;
|
|
res = (char*) __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_GETCWD, &sys);
|
|
|
|
while (!res && retry_alloc && errno == ERANGE) {
|
|
size += ALLOC_INCR;
|
|
newbuf = realloc (buf, size);
|
|
if (!newbuf) {
|
|
free (buf);
|
|
return NULL;
|
|
}
|
|
buf = newbuf;
|
|
|
|
sys.buf = (unsigned int) buf;
|
|
sys.size = (unsigned int) size;
|
|
res = (char*) __send_to_ppe (JSRE_POSIX1_SIGNALCODE, JSRE_GETCWD, &sys);
|
|
}
|
|
|
|
if (!res && local_alloc) {
|
|
free (buf);
|
|
}
|
|
|
|
return res;
|
|
}
|