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#ifndef SHELL_H_SENTRY
#define SHELL_H_SENTRY
#include "dynamic_array.h"
#include "queue.h"
#include <signal.h>
enum {
end_of_file = 4,
new_line = 10,
whitespace = ' ',
tab = 9,
esc = 27,
backslash = '\\',
double_quotes = '"'
};
/* two-letter tokens */
enum {
append = '>' + 1,
and = '&' + 1,
or = '|' + 1,
next_command = ';',
start_subshell = '(',
end_subshell = ')'
};
/* error codes */
enum {
err_filename_expected = 1,
err_redirect_stream_again = 2,
err_redirect_stream_in_pipeline = 3,
err_bg_process = 4,
err_empty_command = 5,
err_extra_chars_after_filename = 6,
err_odd_double_quotes = 7,
err_set_failure = 8,
err_missing_closing_bracket = 9,
err_repeated_background_ch = 10
};
/* storing file names to redirect standard input/output streams */
struct io_type {
char *input_stream;
char *output_stream;
char *output_stream_to_append;
};
struct param_type {
int is_word;
int escape_sequences;
unsigned int double_quotes_counter;
char stored_symbol;
int empty_word_flag;
int tokens;
int wrong_command;
struct io_type streams;
int pipeline;
int new_readline;
int general_pipe_pgid;
int general_subshell_pgid;
int general_pgid;
int subshell;
int fd_read_for_channel;
int fd_read_for_subshell;
int background_process;
};
extern volatile sig_atomic_t last_execution_status;
int filename_waiting(struct param_type *params);
void add_filename(struct dynamic_array *tmp_word, struct param_type *params);
void add_word(struct w_queue *word_chain, struct dynamic_array *tmp_word,
struct param_type *params);
int is_stream_redirection_set(const struct param_type *params);
char** create_cmdline(const struct w_queue *word_chain, int word_counter);
#endif
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