heredoc.c File Reference

Heredoc processing: reads lines and applies variable expansion. More...

#include <readline/readline.h>
#include <stdio.h>
#include "executor.h"
#include "token.h"
#include "env.h"
#include "signals.h"
#include "libft.h"
#include "get_next_line.h"

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Detailed Description

Heredoc processing: reads lines and applies variable expansion.

Definition in file heredoc.c.

Functions
static void	write_heredoc_line (int fd, char *line, t_shell *shell, int expand)
	Write one heredoc line (optionally expanding variables) More...
static char *	read_heredoc_line (void)
	Read a line from STDIN. More...
static void	print_heredoc_eof_error (char *delim)
	Print an EOF warning for an unterminated heredoc (bash style) More...
static int	read_heredoc_lines (int fd, char *delim, t_shell *shell, int expand)
	Read the lines until the delimiter or EOF/SIGINT. More...
int	handle_heredoc (char *delimiter, int quoted, t_shell *shell)
	Execute a heredoc (read input and return a readable fd) More...

Function Documentation

write_heredoc_line()

static void write_heredoc_line ( int  fd, char *  line, t_shell *  shell, int  expand  )

static

Write one heredoc line (optionally expanding variables)

Parameters

fd	Write end of the heredoc pipe
line	Line to write
shell	Shell context (for variable expansion)
expand	Whether to expand variables or not

Definition at line 30 of file heredoc.c.

References t_shell::env, t_shell::exit_status, expand_variables(), and QUOTE_NONE.

Referenced by read_heredoc_lines().

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read_heredoc_line()

static char* read_heredoc_line ( void  )

static

Read a line from STDIN.

Reads lines interactively (readline) or from a pipe (get_next_line)

Returns

The line

Definition at line 52 of file heredoc.c.

Referenced by read_heredoc_lines().

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print_heredoc_eof_error()

static void print_heredoc_eof_error ( char *  delim )

static

Print an EOF warning for an unterminated heredoc (bash style)

Parameters

delim

Delimiter that was expected for the heredoc

Definition at line 73 of file heredoc.c.

Referenced by read_heredoc_lines().

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read_heredoc_lines()

static int read_heredoc_lines ( int  fd, char *  delim, t_shell *  shell, int  expand  )

static

Read the lines until the delimiter or EOF/SIGINT.

Each line is written to fd via write_heredoc_line()

Parameters

fd	Write end of the heredoc pipe
delim	Delimiter for the heredoc
shell	Shell context (for variable expansion)
expand	Whether to expand variables or not

Returns

0 on normal (delimiter/EOF) and 1 on SIGINT

Definition at line 92 of file heredoc.c.

References g_signal, print_heredoc_eof_error(), read_heredoc_line(), and write_heredoc_line().

Referenced by handle_heredoc().

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handle_heredoc()

int handle_heredoc	(	char *	delimiter,
		int	quoted,
		t_shell *	shell
	)

Execute a heredoc (read input and return a readable fd)

• Creates a pipe
• Reads lines into the write end until the delimiter is reached
• Closes the write end and returns the read end
• If the delimiter was quoted, no expansion occurs
• On SIGINT closes both pipe ends and restores STDIN

Parameters

delimiter	Heredoc delimiter
quoted	Whether the delimiter was quoted or not
shell	Shell context (for signals and variable expansion)

Returns

Read end fd of the heredoc pipe or -1 on error/interrupted

Definition at line 133 of file heredoc.c.

References g_signal, read_heredoc_lines(), restore_stdin(), setup_heredoc_signals(), and setup_interactive_signals().

Referenced by collect_one().

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