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File read/write offset

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Added offset integration.
This commit is contained in:
Jacek Galowicz 2011-04-14 17:21:17 +02:00
parent 4990227b5c
commit 2a6c555082
1 changed files with 19 additions and 7 deletions
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26
kernel/syscall.c
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@ -26,17 +26,29 @@
static int sys_read(int fd, const char *buf, size_t len)
{
read_fs(per_core(current_task)->fildes_table[fd].node, (uint8_t*)buf, len, per_core(current_task)->fildes_table[fd].offset);
kprintf("fd:%i, Dateilaenge:%i, Dateiinhalt: %s \n", fd, len, buf);
return len; ////////ACHTUNG: liest noch über das Dateiende hinaus
unsigned int readbytes;
readbytes = read_fs(
per_core(current_task)->fildes_table[fd].node,
(uint8_t*)buf, len,
per_core(current_task)->fildes_table[fd].offset);
per_core(current_task)->fildes_table[fd].offset += readbytes;
/*kprintf("fd:%i, Dateilaenge:%i, Dateiinhalt: %s \n", fd, len, buf);*/
/* Beware: still reading above file limit! */
return readbytes;
}
static int sys_write(int fd, const char *buf, size_t len)
{
//per_core(current_task)->fildes_table[fd].node->write = 1;
write_fs(per_core(current_task)->fildes_table[fd].node, (uint8_t*)buf, len, 0);//per_core(current_task)->fildes_table[fd].offset);
kprintf("ins Dateis. geschr. -- fd:%i, Dateilaenge:%i, Dateiinhalt: %s \n", fd, len, buf);
return len; ////////ACHTUNG: gaukelt dem Benutzer vor alles geschrieben zu haben.
unsigned int wrotebytes;
/* per_core(current_task)->fildes_table[fd].node->write = 1; */
wrotebytes = write_fs(
per_core(current_task)->fildes_table[fd].node,
(uint8_t*)buf, len, 0);
/* per_core(current_task)->fildes_table[fd].offset); */
/* kprintf("ins Dateis. geschr. -- fd:%i, Dateilaenge:%i, Dateiinhalt: %s \n", fd, len, buf); */
per_core(current_task)->fildes_table[fd].offset += wrotebytes;
return wrotebytes;
}
static int sys_open(const char* file, int flags, int mode)