ef0a265086
* VFS and installed MFSes must be in sync before and after this change * Use struct stat from NetBSD. It requires adding new STAT, FSTAT and LSTAT syscalls. Libc modification is both backward and forward compatible. Also new struct stat uses modern field sizes to avoid ABI incompatibility, when we update uid_t, gid_t and company. Exceptions are ino_t and off_t in old libc (though paddings added).
160 lines
5.0 KiB
C
160 lines
5.0 KiB
C
/* The <sys/types.h> header contains important data type definitions.
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* It is considered good programming practice to use these definitions,
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* instead of the underlying base type. By convention, all type names end
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* with _t.
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*/
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#ifndef _TYPES_H
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#define _TYPES_H
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#ifndef _MINIX_ANSI_H
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#include <minix/ansi.h>
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#endif
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typedef unsigned char u8_t; /* 8 bit type */
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typedef unsigned short u16_t; /* 16 bit type */
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typedef signed char i8_t; /* 8 bit signed type */
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typedef short i16_t; /* 16 bit signed type */
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#if __SIZEOF_LONG__ > 4
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/* compiling with gcc on some (e.g. x86-64) platforms */
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typedef unsigned int u32_t; /* 32 bit type */
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typedef int i32_t; /* 32 bit signed type */
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#else
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/* default for ACK or gcc on 32 bit platforms */
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typedef unsigned long u32_t; /* 32 bit type */
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typedef long i32_t; /* 32 bit signed type */
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#endif
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#if !defined(__LONG_LONG_SUPPORTED)
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typedef struct {
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u32_t lo;
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u32_t hi;
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} u64_t;
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#else
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#if __SIZEOF_LONG__ > 4
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typedef unsigned long u64_t;
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#else
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typedef unsigned long long u64_t;
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#endif
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#endif
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/* some Minix specific types that do not conflict with posix */
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typedef u32_t zone_t; /* zone number */
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typedef u32_t block_t; /* block number */
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typedef u32_t bit_t; /* bit number in a bit map */
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typedef u16_t zone1_t; /* zone number for V1 file systems */
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typedef u32_t bitchunk_t; /* collection of bits in a bitmap */
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/* ANSI C makes writing down the promotion of unsigned types very messy. When
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* sizeof(short) == sizeof(int), there is no promotion, so the type stays
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* unsigned. When the compiler is not ANSI, there is usually no loss of
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* unsignedness, and there are usually no prototypes so the promoted type
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* doesn't matter. The use of types like Ino_t is an attempt to use ints
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* (which are not promoted) while providing information to the reader.
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*/
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typedef unsigned long Ino_t;
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#if defined(_MINIX) || defined(__minix)
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/* The type size_t holds all results of the sizeof operator. At first glance,
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* it seems obvious that it should be an unsigned int, but this is not always
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* the case. For example, MINIX-ST (68000) has 32-bit pointers and 16-bit
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* integers. When one asks for the size of a 70K struct or array, the result
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* requires 17 bits to express, so size_t must be a long type. The type
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* ssize_t is the signed version of size_t.
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*/
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#ifndef _SIZE_T
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#define _SIZE_T
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typedef unsigned int size_t;
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#endif
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#ifndef _SSIZE_T
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#define _SSIZE_T
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typedef int ssize_t;
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#endif
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#ifndef _TIME_T
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#define _TIME_T
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typedef long time_t; /* time in sec since 1 Jan 1970 0000 GMT */
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#endif
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#ifndef _CLOCK_T
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#define _CLOCK_T
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typedef long clock_t; /* unit for system accounting */
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#endif
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#ifndef _SIGSET_T
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#define _SIGSET_T
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typedef unsigned long sigset_t;
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#endif
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#ifndef _KEY_T
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#define _KEY_T
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typedef long key_t;
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#endif
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/* Open Group Base Specifications Issue 6 (not complete) */
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typedef long useconds_t; /* Time in microseconds */
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typedef short dev_t; /* holds (major|minor) device pair */
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typedef u32_t big_dev_t;
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/* Types used in disk, inode, etc. data structures.
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* Some u64_t should be i64_t, but anyway with old libc we use .lo only.
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*/
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typedef char gid_t; /* group id */
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typedef u32_t big_gid_t; /* group id */
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typedef unsigned long ino_t; /* i-node number (V3 filesystem) */
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typedef u64_t big_ino_t; /* i-node number (V3 filesystem) */
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typedef unsigned short mode_t; /* file type and permissions bits */
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typedef u32_t big_mode_t; /* file type and permissions bits */
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typedef short nlink_t; /* number of links to a file */
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typedef u32_t big_nlink_t;/* number of links to a file */
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typedef long off_t; /* offset within a file */
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typedef u64_t big_off_t; /* offset within a file */
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typedef int pid_t; /* process id (must be signed) */
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typedef short uid_t; /* user id */
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typedef u32_t big_uid_t; /* user id */
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typedef unsigned long fsblkcnt_t; /* File system block count */
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typedef unsigned long fsfilcnt_t; /* File system file count */
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typedef u32_t blkcnt_t; /* File system block count */
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typedef unsigned long blksize_t; /* File system block size */
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/* Signal handler type, e.g. SIG_IGN */
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typedef void _PROTOTYPE( (*sighandler_t), (int) );
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typedef sighandler_t sig_t;
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/* Compatibility with other systems */
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typedef unsigned char u_char;
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typedef unsigned short u_short;
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typedef unsigned int u_int;
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typedef unsigned long u_long;
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typedef char *caddr_t;
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/* Devices. */
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#define MAJOR 8 /* major device = (dev>>MAJOR) & 0377 */
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#define MINOR 0 /* minor device = (dev>>MINOR) & 0377 */
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#ifndef minor
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#define minor(dev) (((dev) >> MINOR) & 0xff)
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#endif
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#ifndef major
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#define major(dev) (((dev) >> MAJOR) & 0xff)
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#endif
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#ifndef makedev
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#define makedev(major, minor) \
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((dev_t) (((major) << MAJOR) | ((minor) << MINOR)))
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#endif
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#endif /* _MINIX || __minix */
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#if defined(_MINIX)
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typedef unsigned int uint; /* Sys V compatibility */
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#endif
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#endif /* _TYPES_H */
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