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Diffstat (limited to 'winsup/cygwin/fhandler.h')
| -rw-r--r-- | winsup/cygwin/fhandler.h | 804 |
1 files changed, 804 insertions, 0 deletions
diff --git a/winsup/cygwin/fhandler.h b/winsup/cygwin/fhandler.h new file mode 100644 index 0000000..cf19248 --- /dev/null +++ b/winsup/cygwin/fhandler.h @@ -0,0 +1,804 @@ +/* fhandler.h + + Copyright 1996, 1997, 1998, 1999, 2000 Cygnus Solutions. + +This file is part of Cygwin. + +This software is a copyrighted work licensed under the terms of the +Cygwin license. Please consult the file "CYGWIN_LICENSE" for +details. */ + +#ifndef _FHANDLER_H_ +#define _FHANDLER_H_ + +#include <sys/ioctl.h> + +/* Classes + + Code is located in fhandler.cc unless another file name is given. + + fhandler_base normal I/O + + fhandler_disk_file + fhandler_serial Adds vmin and vtime. + fhandler_dev_null Not really I/O + fhandler_dev_zero Faked + + fhandler_dev_raw (fhandler_raw.cc) + fhandler_dev_floppy (fhandler_floppy.cc) + fhandler_dev_tape (fhandler_tape.cc) + + fhandler_pipe + fhandler_socket (net.cc) + + fhandler_tty_slave (tty.cc) + fhandler_pty_master (tty.cc) + fhandler_tty_master (tty.cc) + + fhandler_console Out with ansi control. (console.cc) + + fhandler_windows Windows messages I/O (fhandler_windows.cc) + + fhandler_proc Interesting possibility, not implemented yet +*/ + +enum +{ + FH_RBINARY = 0x00001000, /* binary read mode */ + FH_WBINARY = 0x00002000, /* binary write mode */ + FH_CLOEXEC = 0x00004000, /* close-on-exec */ + FH_RBINSET = 0x00008000, /* binary read mode has been explicitly set */ + FH_WBINSET = 0x00010000, /* binary write mode has been explicitly set */ + FH_APPEND = 0x00020000, /* always append */ + FH_ASYNC = 0x00040000, /* async I/O */ + FH_HADEOF = 0x00080000, /* EOF seen */ + + FH_SYMLINK = 0x00100000, /* is a symlink */ + FH_EXECABL = 0x00200000, /* file looked like it would run: + * ends in .exe or .bat or begins with #! */ + FH_W95LSBUG= 0x00400000, /* set when lseek is called as a flag that + * _write should check if we've moved beyond + * EOF, zero filling if so. */ + FH_NOFRNAME= 0x00800000, /* Set if shouldn't free unix_path_name_ and + windows_path_name_ on destruction. */ + FH_NOEINTR = 0x01000000, /* Set if I/O should be uninterruptible. */ + FH_FFIXUP = 0x02000000, /* Set if need to fixup after fork. */ + FH_LOCAL = 0x04000000, /* File is unix domain socket */ + FH_FIFO = 0x08000000, /* File is FIFO */ + FH_HASACLS = 0x40000000, /* True if fs of file has ACLS */ + + /* Device flags */ + + /* Slow devices */ + FH_CONSOLE = 0x00000001, /* is a console */ + FH_CONIN = 0x00000002, /* console input */ + FH_CONOUT = 0x00000003, /* console output */ + FH_TTYM = 0x00000004, /* is a tty master */ + FH_TTYS = 0x00000005, /* is a tty slave */ + FH_PTYM = 0x00000006, /* is a pty master */ + FH_SERIAL = 0x00000007, /* is a serial port */ + FH_PIPE = 0x00000008, /* is a pipe */ + FH_PIPER = 0x00000009, /* read end of a pipe */ + FH_PIPEW = 0x0000000a, /* write end of a pipe */ + FH_SOCKET = 0x0000000b, /* is a socket */ + FH_WINDOWS = 0x0000000c, /* is a window */ + + FH_SLOW = 0x00000010, /* "slow" device if below this */ + + /* Fast devices */ + FH_DISK = 0x00000010, /* is a disk */ + FH_FLOPPY = 0x00000011, /* is a floppy */ + FH_TAPE = 0x00000012, /* is a tape */ + FH_NULL = 0x00000013, /* is the null device */ + FH_ZERO = 0x00000014, /* is the zero device */ + + FH_NDEV = 0x00000015, /* Maximum number of devices */ + FH_DEVMASK = 0x00000fff, /* devices live here */ + FH_BAD = 0xffffffff +}; + +#define FHDEVN(n) ((n) & FH_DEVMASK) +#define FHISSETF(x) __ISSETF (this, x, FH) +#define FHSETF(x) __SETF (this, x, FH) +#define FHCLEARF(x) __CLEARF (this, x, FH) +#define FHCONDSETF(n, x) __CONDSETF(n, this, x, FH) + +#define FHSTATOFF 0 + +extern const char *windows_device_names[]; +#define __fmode (*(user_data->fmode_ptr)) + +class select_record; +class path_conv; +class fhandler_disk_file; + +class fhandler_base +{ +private: + DWORD status; +public: + int cb; +private: + int access_; + HANDLE io_handle; + + int rpos_; /* Used in text reading */ + int rsize_; + + unsigned long namehash_; /* hashed filename, used as inode num */ + + /* Full unix path name of this file */ + /* File open flags from open () and fcntl () calls */ + int openflags_; + +protected: + char *rabuf; /* used for crlf conversion in text files */ + size_t ralen; + size_t raixget; + size_t raixput; + size_t rabuflen; + + char *unix_path_name_; + char *win32_path_name_; + +public: + void set_name (const char *unix, const char *win32 = NULL, int unit = 0); + + virtual fhandler_base& operator =(fhandler_base &x) + { + memcpy (this, &x, sizeof *this); + unix_path_name_ = x.unix_path_name_ ? strdup (x.unix_path_name_) : NULL; + win32_path_name_ = x.win32_path_name_ ? strdup (x.win32_path_name_) : NULL; + return *this; + }; + fhandler_base (DWORD dev, const char *name = 0, int unit = 0); + virtual ~fhandler_base (); + + /* Non-virtual simple accessor functions. */ + void set_io_handle (HANDLE); + + void set_cb (size_t size) { cb = size; } + DWORD get_device () { return status & FH_DEVMASK; } + virtual int get_unit () { return 0; } + virtual BOOL is_slow () { return get_device () < FH_SLOW; } + + int get_access () { return access_; } + void set_access (int x) { access_ = x; } + + int get_async () { return FHISSETF (ASYNC); } + void set_async (int x) { FHCONDSETF (x, ASYNC); } + + int get_flags () { return openflags_; } + void set_flags (int x) { openflags_ = x; } + + int get_w_binary () { return FHISSETF (WBINARY); } + int get_r_binary () { return FHISSETF (RBINARY); } + + int get_w_binset () { return FHISSETF (WBINSET); } + int get_r_binset () { return FHISSETF (RBINSET); } + + void set_w_binary (int b) { FHCONDSETF (b, WBINARY); FHSETF (WBINSET); } + void set_r_binary (int b) { FHCONDSETF (b, RBINARY); FHSETF (RBINSET); } + + int get_r_no_interrupt () { return FHISSETF (NOEINTR); } + void set_r_no_interrupt (int b) { FHCONDSETF (b, NOEINTR); } + + int get_close_on_exec () { return FHISSETF (CLOEXEC); } + int set_close_on_exec_flag (int b) { return FHCONDSETF (b, CLOEXEC); } + + void set_check_win95_lseek_bug (int b = 1) { FHCONDSETF (b, W95LSBUG); } + int get_check_win95_lseek_bug () { return FHISSETF (W95LSBUG); } + + int get_need_fork_fixup () { return FHISSETF (FFIXUP); } + void set_need_fork_fixup () { FHSETF (FFIXUP); } + + virtual void set_close_on_exec (int val); + virtual void fixup_after_fork (HANDLE parent); + + int get_symlink_p () { return FHISSETF (SYMLINK); } + void set_symlink_p (int val) { FHCONDSETF (val, SYMLINK); } + void set_symlink_p () { FHSETF (SYMLINK); } + + int get_socket_p () { return FHISSETF (LOCAL); } + void set_socket_p (int val) { FHCONDSETF (val, LOCAL); } + void set_socket_p () { FHSETF (LOCAL); } + + int get_execable_p () { return FHISSETF (EXECABL); } + void set_execable_p (int val) { FHCONDSETF (val, EXECABL); } + void set_execable_p () { FHSETF (EXECABL); } + + int get_append_p () { return FHISSETF (APPEND); } + void set_append_p (int val) { FHCONDSETF (val, APPEND); } + void set_append_p () { FHSETF (APPEND); } + + int get_readahead_valid () { return raixget < ralen; } + int puts_readahead (const char *s, size_t len = (size_t) -1); + int put_readahead (char value); + + int get_readahead (); + int peek_readahead (int queryput = 0); + + int eat_readahead (int n); + + void set_readahead_valid (int val, int ch = -1); + + int has_acls () { return FHISSETF (HASACLS); } + void set_has_acls (int val) { FHCONDSETF (val, HASACLS); } + + int no_free_names () { return FHISSETF (NOFRNAME); } + void set_no_free_names (int val) { FHCONDSETF (val, NOFRNAME); } + void set_no_free_names () { FHSETF (NOFRNAME); } + + const char *get_name () { return unix_path_name_; } + const char *get_win32_name () { return win32_path_name_; } + unsigned long get_namehash () { return namehash_; } + + + /* fixup fd possibly non-inherited handles after fork */ + void fork_fixup (HANDLE parent, HANDLE &h, const char *name); + + /* Potentially overridden virtual functions. */ + virtual int open (const char *, int flags, mode_t mode = 0) + { + return open (flags, mode); + } + virtual int open (int flags, mode_t mode = 0); + virtual int close (); + virtual int fstat (struct stat *buf); + virtual int ioctl (unsigned int cmd, void *); + virtual char const * ttyname () { return get_name(); } + virtual int read (void *ptr, size_t len); + virtual int write (const void *ptr, size_t len); + virtual off_t lseek (off_t offset, int whence); + virtual int lock (int, struct flock *); + virtual void dump (); + virtual int dup (fhandler_base *child); + + void *operator new (size_t, void *p) {return p;} + + virtual void init (HANDLE, DWORD, mode_t); + + virtual int tcflush (int); + virtual int tcsendbreak (int); + virtual int tcdrain (); + virtual int tcflow (int); + virtual int tcsetattr (int a, const struct termios *t); + virtual int tcgetattr (struct termios *t); + virtual int tcsetpgrp (const pid_t pid); + virtual int tcgetpgrp (); + virtual int is_tty () { return 0; } + virtual BOOL is_device () { return TRUE; } + virtual char *ptsname () { return NULL;} + virtual class fhandler_socket *is_socket () { return 0; } + virtual class fhandler_console *is_console () { return 0; } + virtual int is_windows () {return 0; } + + virtual int raw_read (void *ptr, size_t ulen); + virtual int raw_write (const void *ptr, size_t ulen); + + /* Function to save state of a fhandler_base into memory. */ + virtual int linearize (unsigned char *); + /* Function to de-linearize into a fd */ + virtual int de_linearize (const char *, const char *, const char *); + + /* Virtual accessor functions to hide the fact + that some fd's have two handles. */ + virtual HANDLE get_handle () const { return io_handle; } + virtual HANDLE get_io_handle () const { return io_handle; } + virtual HANDLE get_output_handle () const { return io_handle; } + virtual BOOL hit_eof () {return FALSE;} + virtual select_record *select_read (select_record *s); + virtual select_record *select_write (select_record *s); + virtual select_record *select_except (select_record *s); + virtual int ready_for_read (int fd, DWORD howlong, int ignra); + virtual const char * get_native_name () + { + return windows_device_names[FHDEVN (status)]; + } + virtual int bg_check (int, int x = 0) {return 1;} +}; + +class fhandler_socket: public fhandler_base +{ +private: + int addr_family; +public: + fhandler_socket (const char *name = 0); + fhandler_socket (unsigned int, const char *name = 0); + ~fhandler_socket (); + int get_socket () const { return (int) get_handle(); } + fhandler_socket * is_socket () { return this; } + int write (const void *ptr, size_t len); + int read (void *ptr, size_t len); + int ioctl (unsigned int cmd, void *); + off_t lseek (off_t offset, int whence) { return 0; } + int close (); + + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); + int get_addr_family () {return addr_family;} + void set_addr_family (int af) {addr_family = af;} +}; + +class fhandler_pipe: public fhandler_base +{ +public: + fhandler_pipe (const char *name = 0); + off_t lseek (off_t offset, int whence); + /* This strange test is due to the fact that we can't rely on + Windows shells to "do the right thing" with pipes. Apparently + the can keep one end of the pipe open when it shouldn't be. */ + BOOL is_slow () {return os_being_run == winNT;} + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); +}; + +class fhandler_dev_raw: public fhandler_base +{ +protected: + char *devbuf; + size_t devbufsiz; + size_t devbufstart; + size_t devbufend; + int eom_detected : 1; + int eof_detected : 1; + int lastblk_to_read : 1; + int is_writing : 1; + int has_written : 1; + int unit; + + virtual void clear (void); + virtual int writebuf (void); + + /* returns not null, if `win_error' determines an end of media condition */ + virtual int is_eom(int win_error) = 0; + /* returns not null, if `win_error' determines an end of file condition */ + virtual int is_eof(int win_error) = 0; + + fhandler_dev_raw (DWORD dev, const char *name, int unit); + +public: + ~fhandler_dev_raw (void); + + /* Function to de-linearize into a fd */ + int de_linearize (const char *, const char *, const char *); + + int open (const char *path, int flags, mode_t mode = 0); + int close (void); + + int raw_read (void *ptr, size_t ulen); + int raw_write (const void *ptr, size_t ulen); + + int fstat (struct stat *buf); + + int dup (fhandler_base *child); + + int ioctl (unsigned int cmd, void *buf); +}; + +class fhandler_dev_floppy: public fhandler_dev_raw +{ +protected: + virtual int is_eom (int win_error); + virtual int is_eof (int win_error); + +public: + fhandler_dev_floppy (const char *name, int unit); + + virtual int open (const char *path, int flags, mode_t mode = 0); + virtual int close (void); + + virtual off_t lseek (off_t offset, int whence); + + virtual int ioctl (unsigned int cmd, void *buf); +}; + +class fhandler_dev_tape: public fhandler_dev_raw +{ + int norewind; + int lasterr; + +protected: + virtual void clear (void); + + virtual int is_eom (int win_error); + virtual int is_eof (int win_error); + +public: + fhandler_dev_tape (const char *name, int unit); + + virtual int open (const char *path, int flags, mode_t mode = 0); + virtual int close (void); + + virtual off_t lseek (off_t offset, int whence); + + virtual int fstat (struct stat *buf); + + virtual int dup (fhandler_base *child); + + virtual int ioctl (unsigned int cmd, void *buf); + +private: + int tape_write_marks (int marktype, DWORD len); + int tape_get_pos (unsigned long *ret); + int tape_set_pos (int mode, long count, BOOLEAN sfm_func = FALSE); + int tape_erase (int mode); + int tape_prepare (int action); + BOOLEAN tape_get_feature (DWORD parm); + int tape_get_blocksize (long *min, long *def, long *max, long *cur); + int tape_set_blocksize (long count); + int tape_status (struct mtget *get); + int tape_compression (long count); +}; + +/* Standard disk file */ + +class fhandler_disk_file: public fhandler_base +{ +private: + int check_execable_p (const char *path); + +public: + fhandler_disk_file (const char *name); + + int open (const char *path, int flags, mode_t mode = 0); + int open (path_conv& real_path, int flags, mode_t mode); + int close (); + int lock (int, struct flock *); + BOOL is_device () { return FALSE; } + int fstat (struct stat *buf); +}; + +class fhandler_serial: public fhandler_base +{ +private: + unsigned int vmin_; /* from termios */ + unsigned int vtime_; /* from termios */ + pid_t pgrp_; + +public: + int overlapped_armed; + OVERLAPPED io_status; + + /* Constructor */ + fhandler_serial (const char *name, DWORD devtype = FH_SERIAL, int unit = 0); + + int open (const char *path, int flags, mode_t mode); + int close (); + void init (HANDLE h, DWORD a, mode_t flags); + void overlapped_setup (); + int dup (fhandler_base *child); + int raw_read (void *ptr, size_t ulen); + int raw_write (const void *ptr, size_t ulen); + int tcsendbreak (int); + int tcdrain (); + int tcflow (int); + int tcsetattr (int a, const struct termios *t); + int tcgetattr (struct termios *t); + off_t lseek (off_t offset, int whence) { return 0; } + int tcflush (int); + void dump (); + int is_tty () { return 1; } + void fixup_after_fork (HANDLE parent); + int de_linearize (const char *, const char *, const char *); + + /* We maintain a pgrp so that tcsetpgrp and tcgetpgrp work, but we + don't use it for permissions checking. fhandler_tty_slave does + permission checking on pgrps. */ + virtual int tcgetpgrp () { return pgrp_; } + virtual int tcsetpgrp (const pid_t pid) { pgrp_ = pid; return 0; } + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); +}; + +class fhandler_termios: public fhandler_base +{ +protected: + HANDLE output_handle; + virtual void doecho (const void *str, DWORD len) {}; + virtual int accept_input () {return 1;}; +public: + tty_min *tc; + fhandler_termios (DWORD dev, const char *name = 0, int unit = 0) : + fhandler_base (dev, name, unit) + { + // nothing to do + } + HANDLE restart_output_event; + HANDLE get_output_handle () const { return output_handle; } + int line_edit (const char *rptr, int nread, int always_accept = 0); + void set_output_handle (HANDLE h) { output_handle = h; } + void tcinit (tty_min *this_tc, int force = FALSE); + virtual int is_tty () { return 1; } + int tcgetpgrp (); + int tcsetpgrp (int pid); + void set_ctty (int ttynum, int flags); + int bg_check (int sig, int blocksigs = 1); +}; + +/* This is a input and output console handle */ +class fhandler_console: public fhandler_termios +{ +private: + +/* Output state */ + + // enum {normal, gotesc, gotsquare, gotarg1, gotcommand} state; +#define normal 1 +#define gotesc 2 +#define gotsquare 3 +#define gotarg1 4 +#define gotrsquare 5 +#define gotcommand 6 +#define gettitle 7 +#define eattitle 8 +#define MAXARGS 10 + int state_; + int args_[MAXARGS]; + int nargs_; + + DWORD default_color; + +/* Output calls */ + + BOOL fillin_info (); + void clear_screen (int, int, int, int); + void scroll_screen (int, int, int, int, int, int); + void cursor_set (BOOL, int, int); + void cursor_get (int *, int *); + void cursor_rel (int, int); + const unsigned char * write_normal (unsigned const char*, unsigned const char *); + void char_command (char); + int output_tcsetattr (int a, const struct termios *t); + +/* Input calls */ + int igncr_enabled (); + int input_tcsetattr (int a, const struct termios *t); + +public: + + fhandler_console (const char *name); + + fhandler_console* is_console () { return this; } + + int open (const char *path, int flags, mode_t mode = 0); + + int write (const void *ptr, size_t len); + void doecho (const void *str, DWORD len) { (void) write (str, len); } + int read (void *ptr, size_t len); + int close (); + + int tcflush (int); + int tcsetattr (int a, const struct termios *t); + int tcgetattr (struct termios *t); + + int tcsetpgrp (const pid_t pid) { tc->pgid = pid; return 0; } + + /* Special dup as we must dup two handles */ + int dup (fhandler_base *child); + + int ioctl (unsigned int cmd, void *); + void init (HANDLE, DWORD, mode_t); + + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); + int de_linearize (const char *, const char *, const char *); + void set_close_on_exec (int val); + void fixup_after_fork (HANDLE parent); + void set_input_state () + { + if (TTYISSETF (RSTCONS)) + input_tcsetattr (0, &tc->ti); + } +}; + +class fhandler_tty_common: public fhandler_termios +{ +public: + fhandler_tty_common (DWORD dev, const char *name = 0, int unit = 0) : + fhandler_termios (dev, name, unit), + ttynum (unit) + { + // nothing to do + } + HANDLE output_done_event; // Raised by master when tty's output buffer + // written. Write status in tty::write_retval. + HANDLE ioctl_request_event; // Raised by slave to perform ioctl() request. + // Ioctl() request in tty::cmd/arg. + HANDLE ioctl_done_event; // Raised by master on ioctl() completion. + // Ioctl() status in tty::ioctl_retval. + HANDLE output_mutex; + HANDLE inuse; // used to indicate that a tty is in use + + + DWORD __acquire_output_mutex (const char *fn, int ln, DWORD ms); + void __release_output_mutex (const char *fn, int ln); + + int ttynum; // Master tty num. + virtual int dup (fhandler_base *child); + + tty *get_ttyp () { return (tty *)tc; } + int get_unit () { return ttynum; } + + int close (); + void set_close_on_exec (int val); + void fixup_after_fork (HANDLE parent); + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); +}; + +class fhandler_tty_slave: public fhandler_tty_common +{ + void send_ioctl_request (); + +public: + /* Constructor */ + fhandler_tty_slave (const char *name); + fhandler_tty_slave (int, const char *name); + + int open (const char *path, int flags, mode_t mode = 0); + int write (const void *ptr, size_t len); + int read (void *ptr, size_t len); + void init (HANDLE, DWORD, mode_t); + + int tcsetattr (int a, const struct termios *t); + int tcgetattr (struct termios *t); + int tcflush (int); + int ioctl (unsigned int cmd, void *); + + off_t lseek (off_t offset, int whence) { return 0; } +}; + +class fhandler_pty_master: public fhandler_tty_common +{ + int pktmode; // non-zero if pty in a packet mode. +public: + int neednl_; // Next read should start with \n + + /* Constructor */ + fhandler_pty_master (const char *name, DWORD devtype = FH_PTYM, int unit = -1); + + int process_slave_output (char *buf, size_t len); + void doecho (const void *str, DWORD len); + int accept_input (); + int open (const char *path, int flags, mode_t mode = 0); + int write (const void *ptr, size_t len); + int read (void *ptr, size_t len); + int close (); + + int tcsetattr (int a, const struct termios *t); + int tcgetattr (struct termios *t); + int tcflush (int); + int ioctl (unsigned int cmd, void *); + + off_t lseek (off_t offset, int whence) { return 0; } + char *ptsname (); + + void set_close_on_exec (int val); + void fixup_after_fork (HANDLE parent); + BOOL hit_eof (); +}; + +class fhandler_tty_master: public fhandler_pty_master +{ +public: + /* Constructor */ + fhandler_tty_master (const char *name, int unit); + fhandler_console *console; // device handler to perform real i/o. + HANDLE hThread; // process_output thread handle. + + int init (int); + int init_console (); + void fixup_after_fork (HANDLE parent); + int de_linearize (const char *, const char *, const char *); +}; + +class fhandler_dev_null: public fhandler_base +{ +public: + fhandler_dev_null (const char *name); + + void dump (); + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); +}; + +class fhandler_dev_zero: public fhandler_base +{ +public: + fhandler_dev_zero (const char *name); + int open (const char *path, int flags, mode_t mode = 0); + int write (const void *ptr, size_t len); + int read (void *ptr, size_t len); + off_t lseek (off_t offset, int whence); + int close (void); + + void dump (); +}; + +class fhandler_windows: public fhandler_base +{ +private: + HWND hWnd_; // the window whose messages are to be retrieved by read() call + int method_; // write method (Post or Send) +public: + fhandler_windows (const char *name = 0); + int is_windows (void) { return 1; } + int open (const char *path, int flags, mode_t mode = 0); + int write (const void *ptr, size_t len); + int read (void *ptr, size_t len); + int ioctl (unsigned int cmd, void *); + off_t lseek (off_t offset, int whence) { return 0; } + int close (void) { return 0; } + + void set_close_on_exec (int val); + void fixup_after_fork (HANDLE parent); + select_record *select_read (select_record *s); + select_record *select_write (select_record *s); + select_record *select_except (select_record *s); + int ready_for_read (int fd, DWORD howlong, int ignra); +}; + +#if 0 +/* You can't do this */ +typedef union +{ + fhandler_normal normal; + fhandler_dev_null dev_null; + fhandler bare; + fhandler_serial tty; +} fhandler_union; +#else +#define fhandler_union fhandler_console +#endif +struct select_record +{ + int fd; + HANDLE h; + fhandler_base *fh; + BOOL saw_error; + BOOL windows_handle; + BOOL read_ready, write_ready, except_ready; + BOOL read_selected, write_selected, except_selected; + select_record (fhandler_base *in_fh = NULL) {memset (this, 0, sizeof(select_record)); fh = in_fh;} + int (*startup) (select_record *me, class select_stuff *stuff); + int (*poll) (select_record *me, fd_set *readfds, fd_set *writefds, + fd_set *exceptfds); + int (*verify) (select_record *me, fd_set *readfds, fd_set *writefds, + fd_set *exceptfds); + void (*cleanup) (select_record *me, class select_stuff *stuff); + struct select_record *next; +}; + +class select_stuff +{ +public: + ~select_stuff (); + BOOL always_ready, windows_used; + int total; + select_record start; + void *device_specific[FH_NDEV]; + + int test_and_set (int i, fd_set *readfds, fd_set *writefds, + fd_set *exceptfds); + int poll (fd_set *readfds, fd_set *writefds, fd_set *exceptfds); + int wait (fd_set *readfds, fd_set *writefds, fd_set *exceptfds, DWORD ms); +}; + +uid_t __stdcall get_file_owner (int, const char *); +gid_t __stdcall get_file_group (int, const char *); + +void __stdcall set_inheritance (HANDLE &h, int val, const char *name = NULL); + +#endif /* _FHANDLER_H_ */ |