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add basic support for syscall stat

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This commit is contained in:
Marian Ohligs 2011-09-28 00:10:54 +02:00
parent dc679f44d5
commit 675c47f1b3
2 changed files with 55 additions and 4 deletions
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24
include/metalsvm/fs.h
View file

@ -165,6 +165,30 @@ typedef struct {
char entries[MAX_DATAENTRIES];
} data_block_t;
/* Time Value Specification Structures, P1003.1b-1993, p. 261 */
struct timespec {
long tv_sec; /* Seconds */
long tv_nsec; /* Nanoseconds */
};
struct stat
{
uint16_t st_dev; /* ID of device containing file */
uint16_t st_ino; /* inode number */
uint32_t st_mode; /* protection */
unsigned short st_nlink; /* number of hard links */
uint16_t st_uid; /* user ID of owner */
uint16_t st_gid; /* group ID of owner */
uint16_t st_rdev; /* device ID (if special file) */
off_t st_size; /* total size, in bytes */
struct timespec st_atim; /* time of last access */
struct timespec st_mtim; /* time of last modification */
struct timespec st_ctim; /* time of last status change */
uint32_t st_blksize; /* blocksize for filesystem I/O */
uint32_t st_blocks; /* number of blocks allocated */
} stat_t;
extern vfs_node_t* fs_root; // The root of the filesystem.
/** @defgroup fsfunc FS related functions

35
kernel/syscall.c
View file

@ -98,6 +98,33 @@ static int sys_dup(int fd)
return new_fd;
}
static int sys_stat(const char* name, struct stat* st) {
vfs_node_t* node;
node = findnode_fs(name);
if (node == NULL)
return -EINVAL;
st->st_dev = 0; /* ID of device containing file */
st->st_ino = 0; /* inode number */
st->st_mode = node->mask; /* protection */
st->st_nlink = 0; /* number of hard links */
st->st_uid = node->uid; /* user ID of owner */
st->st_gid = node->gid; /* group ID of owner */
st->st_rdev = node->type; /* device ID (if special file) */
st->st_size = (node->block_size / MAX_DATAENTRIES + 1) * MAX_DATAENTRIES; /* total size, in bytes */
st->st_blksize = node->block_size; /* blocksize for filesystem I/O */
st->st_blocks = node->block_size / MAX_DATAENTRIES + 1; /* number of blocks allocated */
st->st_atim.tv_sec = 0; /* time of last access */
st->st_atim.tv_nsec = 0;
st->st_mtim.tv_sec = 0; /* time of last modification */
st->st_mtim.tv_nsec = 0;
st->st_ctim.tv_sec = 0; /* time of last status change */
st->st_ctim.tv_nsec = 0;
return 0;
}
#if defined(CONFIG_LWIP) && LWIP_SOCKET
static int sys_socket(int domain, int type, int protocol)
{
@ -267,10 +294,10 @@ int syscall_handler(uint32_t sys_nr, ...)
break;
}
case __NR_stat: {
//const char* name = va_arg(vl, const char*);
//struct stat* st = va_arg(vl, struct stat*);
ret = -EINVAL;
const char* name = va_arg(vl, const char*);
struct stat* st = va_arg(vl, struct stat*);
ret = sys_stat(name, st);
break;
}
case __NR_read: {