mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-11-26 02:13:38 +08:00
107 lines
2.2 KiB
C
107 lines
2.2 KiB
C
#ifndef FISH_IO_H
|
|
#define FISH_IO_H
|
|
|
|
/**
|
|
Describes what type of IO operation an io_data_t represents
|
|
*/
|
|
enum io_mode
|
|
{
|
|
IO_FILE, IO_PIPE, IO_FD, IO_BUFFER, IO_CLOSE
|
|
}
|
|
;
|
|
|
|
/** Represents an FD redirection */
|
|
typedef struct io_data
|
|
{
|
|
/** Type of redirect */
|
|
int io_mode;
|
|
/** FD to redirect */
|
|
int fd;
|
|
/**
|
|
Type-specific parameter for redirection
|
|
*/
|
|
union
|
|
{
|
|
/** Fds for IO_PIPE and for IO_BUFFER */
|
|
int pipe_fd[2];
|
|
/** Filename IO_FILE */
|
|
wchar_t *filename;
|
|
/** fd to redirect specified fd to, for IO_FD*/
|
|
int old_fd;
|
|
} param1
|
|
;
|
|
/**
|
|
Second type-specific paramter for redirection
|
|
*/
|
|
union
|
|
{
|
|
/** file creation flags to send to open for IO_FILE */
|
|
int flags;
|
|
/** buffer to save output in for IO_BUFFER */
|
|
buffer_t *out_buffer;
|
|
/** Whether to close old_fd for IO_FD */
|
|
int close_old;
|
|
} param2
|
|
;
|
|
|
|
/**
|
|
Set to true if this is an input io redirection
|
|
*/
|
|
int is_input;
|
|
|
|
/** Pointer to the next IO redirection */
|
|
struct io_data *next;
|
|
}
|
|
io_data_t;
|
|
|
|
|
|
/**
|
|
Join two chains of io redirections
|
|
*/
|
|
io_data_t *io_add( io_data_t *first_chain, io_data_t *decond_chain );
|
|
|
|
/**
|
|
Remove the specified io redirection from the chain
|
|
*/
|
|
io_data_t *io_remove( io_data_t *list, io_data_t *element );
|
|
|
|
/**
|
|
Make a copy of the specified chain of redirections. Uses halloc.
|
|
*/
|
|
io_data_t *io_duplicate( void *context, io_data_t *l );
|
|
|
|
/**
|
|
Return the last io redirection in the chain for the specified file descriptor.
|
|
*/
|
|
io_data_t *io_get( io_data_t *io, int fd );
|
|
|
|
|
|
|
|
/**
|
|
Free all resources used by a IO_BUFFER type io redirection.
|
|
*/
|
|
void io_buffer_destroy( io_data_t *io_buffer );
|
|
|
|
/**
|
|
Create a IO_BUFFER type io redirection, complete with a pipe and a
|
|
buffer_t for output. The default file descriptor used is 1 for
|
|
output buffering and 0 for input buffering.
|
|
|
|
\param is_input set this parameter to zero if the buffer should be
|
|
used to buffer the output of a command, or non-zero to buffer the
|
|
input to a command.
|
|
*/
|
|
io_data_t *io_buffer_create( int is_input );
|
|
|
|
/**
|
|
Close output pipe, and read from input pipe until eof.
|
|
*/
|
|
void io_buffer_read( io_data_t *d );
|
|
|
|
/**
|
|
Print debug information about the specified IO redirection chain to stderr.
|
|
*/
|
|
void io_print( io_data_t *io );
|
|
|
|
#endif
|