update name of code to labcodes

labcodes/lab8/libs/unistd.h

@@ -0,0 +1,68 @@
+#ifndef __LIBS_UNISTD_H__
+#define __LIBS_UNISTD_H__
+
+#define T_SYSCALL           0x80
+
+/* syscall number */
+#define SYS_exit            1
+#define SYS_fork            2
+#define SYS_wait            3
+#define SYS_exec            4
+#define SYS_clone           5
+#define SYS_yield           10
+#define SYS_sleep           11
+#define SYS_kill            12
+#define SYS_gettime         17
+#define SYS_getpid          18
+#define SYS_mmap            20
+#define SYS_munmap          21
+#define SYS_shmem           22
+#define SYS_putc            30
+#define SYS_pgdir           31
+#define SYS_open            100
+#define SYS_close           101
+#define SYS_read            102
+#define SYS_write           103
+#define SYS_seek            104
+#define SYS_fstat           110
+#define SYS_fsync           111
+#define SYS_getcwd          121
+#define SYS_getdirentry     128
+#define SYS_dup             130
+/* OLNY FOR LAB6 */
+#define SYS_lab6_set_priority 255
+
+/* SYS_fork flags */
+#define CLONE_VM            0x00000100  // set if VM shared between processes
+#define CLONE_THREAD        0x00000200  // thread group
+#define CLONE_FS            0x00000800  // set if shared between processes
+
+/* VFS flags */
+// flags for open: choose one of these
+#define O_RDONLY            0           // open for reading only
+#define O_WRONLY            1           // open for writing only
+#define O_RDWR              2           // open for reading and writing
+// then or in any of these:
+#define O_CREAT             0x00000004  // create file if it does not exist
+#define O_EXCL              0x00000008  // error if O_CREAT and the file exists
+#define O_TRUNC             0x00000010  // truncate file upon open
+#define O_APPEND            0x00000020  // append on each write
+// additonal related definition
+#define O_ACCMODE           3           // mask for O_RDONLY / O_WRONLY / O_RDWR
+
+#define NO_FD               -0x9527     // invalid fd
+
+/* lseek codes */
+#define LSEEK_SET           0           // seek relative to beginning of file
+#define LSEEK_CUR           1           // seek relative to current position in file
+#define LSEEK_END           2           // seek relative to end of file
+
+#define FS_MAX_DNAME_LEN    31
+#define FS_MAX_FNAME_LEN    255
+#define FS_MAX_FPATH_LEN    4095
+
+#define EXEC_MAX_ARG_NUM    32
+#define EXEC_MAX_ARG_LEN    4095
+
+#endif /* !__LIBS_UNISTD_H__ */
+