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WIP parsing expansions

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This commit is contained in:
LuckyLaszlo
2021-11-07 04:41:17 +01:00
parent b9fc6a9bc4
commit 0a5c7545c1
18 changed files with 631 additions and 355 deletions
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189
srcs/parsing/HUGO_WIP.c Normal file
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@@ -0,0 +1,189 @@
#include "minishell.h"
int is_redirection(enum e_token_id id)
{
if (id == T_LESS) // <
return (1);
else if (id == T_GREAT) // >
return (1);
else if (id == T_DLESS) // <<
return (1);
else if (id == T_DGREAT) // >>
return (1);
else
return (0);
}
// count nbr word in cmd, minus redirection and heredoc
int next_cmd(t_token *token)
{
int i;
i = 0;
while (token && token->id != T_PIPE)
{
if (is_redirection(token->id))
i--;
else
i++;
token = token->next;
}
if (token && token->id == T_PIPE)
token = token->next;
return (i);
}
void handle_argv(t_token *token, t_cmd **cmd, size_t cmd_nbr)
{
int argc;
int j;
int i;
int redirection;
i = 0;
while (cmd_nbr)
{
argc = next_cmd(token);
cmd[i]->argv = calloc(argc + 1, sizeof(char *));
cmd[i]->argv[argc] = NULL;
j = 0;
redirection = is_redirection(token->id);
while (token && token->id != T_PIPE)
{
if (!redirection && token->id == T_WORD)
{
cmd[i]->argv[j] = ft_strdup(token->content);
j++;
}
redirection = is_redirection(token->id);
token = token->next;
}
if (token && token->id == T_PIPE)
token = token->next;
cmd_nbr--;
i++;
}
}
int fill_builtin(t_cmd *cmd, int (*builtin)(int, char **, t_all *))
{
cmd->builtin_command = &builtin;
return (1);
}
int handle_builtin(t_cmd *cmd)
{
if (!ft_strncmp(cmd->argv[0], "echo", 4))
return (fill_builtin(cmd, &builtin_echo));
// else if (!ft_strncmp(cmd->argv[0], "cd", 2))
// return (fill_builtin(cmd, &builtin_cd));
// else if (!ft_strncmp(cmd->argv[0], "pwd", 3))
// return (fill_builtin(cmd, &builtin_pwd));
// else if (!ft_strncmp(cmd->argv[0], "export", 6))
// return (fill_builtin(cmd, &builtin_export));
// else if (!ft_strncmp(cmd->argv[0], "unset", 5))
// return (fill_builtin(cmd, &builtin_unset));
else if (!ft_strncmp(cmd->argv[0], "env", 3))
return (fill_builtin(cmd, &builtin_env));
else if (!ft_strncmp(cmd->argv[0], "exit", 4))
return (fill_builtin(cmd, &builtin_exit));
return (0);
}
void find_path(char **argv, char **envp)
{
int i;
char **path;
char *cmd;
i = 0;
while (envp[i] && ft_strncmp(envp[i], "PATH=", 5))
i++;
path = ft_split(envp[i] + 5, ':'); // 5 = lentgh of "PATH="
i = -1;
while (*path && i != 0)
{
cmd = ft_strjoin(path[0], "/");
cmd = ft_strjoin(cmd, argv[0]);
i = access(cmd, X_OK);
path++;
}
if (!(*path))
exit(0); // gerer erreur
argv[0] = cmd;
}
void handle_path(t_cmd **cmd_arr, char **envp)
{
int i;
i = 0;
while (cmd_arr[i])
{
if (!handle_builtin(cmd_arr[i]))
find_path(cmd_arr[i]->argv, envp);
i++;
}
}
void fd_redirection(t_token *token, t_cmd *cmd)
{
int flag;
if (token->id == T_LESS) // '<'
{
flag = O_RDONLY | O_CREAT;
if (cmd->fd_in != 0)
close(cmd->fd_in);
cmd->fd_in = open(token->next->content, flag);
}
else if (token->id == T_GREAT) // '>'
{
flag = O_WRONLY | O_CREAT | O_TRUNC;
cmd->fd_out = open(token->next->content, flag, S_IRWXU);
}
else if (token->id == T_DGREAT) // '>>'
{
flag = O_WRONLY | O_CREAT | O_APPEND;
cmd->fd_out = open(token->next->content, flag, S_IRWXU);
}
}
void fd_heredoc(t_token *token, t_cmd *cmd)
{
(void)token;
(void)cmd;
}
void handle_fd(t_token *token, t_cmd **cmd_arr)
{
int *pipes_fd;
int i;
i = 0;
while (cmd_arr[i])
{
cmd_arr[i]->fd_out = 1;
while (token && token->id != T_PIPE)
{
if (token->id == T_DGREAT) // '<<'
fd_heredoc(token, cmd_arr[i]);
else
fd_redirection(token, cmd_arr[i]);
token = token->next;
}
if (token && token->id == T_PIPE)
{
token = token->next;
pipes_fd = calloc(2, sizeof(int));
pipe(pipes_fd);
if (cmd_arr[i]->fd_out == 1)
cmd_arr[i]->fd_out = pipes_fd[1];
else
close(pipes_fd[1]);
cmd_arr[i + 1]->fd_in = pipes_fd[0];
}
i++;
}
}

49
srcs/parsing/alloc_cmd_array.c Normal file
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@@ -0,0 +1,49 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* alloc_cmd_array.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/02 22:46:23 by lperrey #+# #+# */
/* Updated: 2021/11/07 04:29:54 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
size_t count_pipes(t_token *token)
{
size_t count;
count = 0;
while (token)
{
if (token->id == T_PIPE)
count++;
token = token->next;
}
return (count);
}
t_cmd **alloc_cmd_array(size_t cmd_nbr)
{
t_cmd **cmd_arr;
size_t i;
cmd_arr = ft_calloc(cmd_nbr + 1, sizeof (void *));
if (!cmd_arr)
return (ft_retp_perror(NULL, "alloc_cmd()"));
i = 0;
while (i < cmd_nbr)
{
cmd_arr[i] = ft_calloc(1, sizeof (*cmd_arr[i]));
if (!cmd_arr[i])
{
ft_free_2d_arr(cmd_arr);
return (ft_retp_perror(NULL, "alloc_cmd()"));
}
i++;
}
return (cmd_arr);
}

113
srcs/parsing/expansions/expand_token.c Normal file
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@@ -0,0 +1,113 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* expand_token.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/07 02:01:33 by lperrey #+# #+# */
/* Updated: 2021/11/07 04:36:12 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
t_list *ft_lstnew_generic(size_t lst_sizse, size_t content_size);
enum e_in_quote_state
{
NOT_IN = 0,
IN_QUOTES = '\'',
IN_DQUOTES = '\"'
};
static t_list *ret_parameter_expansion(t_token *t, int *i);
t_list *expand_token(t_token *t)
{
int in_quotes;
int i;
t_list head;
t_list *expand;
in_quotes = 0;
i = 0;
head.next = NULL;
expand = &head;
while (t->content[i])
{
if (t->content[i] == '$')
{
expand->next = ret_parameter_expansion(t, &i);
if (!expand->next)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
}
else
{
expand->next = ft_lstnew_generic(sizeof(t_list), ft_strlen(&t->content[i]) + 1);
if (!expand->next)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
while (t->content[i] && (t->content[i] != '$' && in_quotes != IN_QUOTES))
{
// quoting
if (t->content[i] == '\'' && in_quotes != IN_DQUOTES)
{
if (in_quotes == IN_QUOTES)
in_quotes = 0;
else
in_quotes = IN_QUOTES;
}
i++;
}
}
}
return (head.next);
}
// a voir si je retourne pas plutot un "char *".
// Malloc la lst dans la fonction est peut-être un peu superflu et pas super clair.
// et aussi changer "t_token *t" en "char *content", inutile d'avoir le token entier.
static t_list *ret_parameter_expansion(t_token *t, int *i)
{
t_list *expand;
char *tmp;
int i_tmp;
tmp = ft_calloc(ft_strlen(&t->content[*i]) + 1, 1);
if (!tmp)
return (NULL);
expand = ft_lstnew(NULL);
if (!expand)
return (ft_retp_free(NULL, tmp, free));
(*i)++; // skip '$'
if (t->content[*i] == '?')
{
i++;
expand->content = ft_itoa(g_all->last_exit_status);
return (ft_retp_free(expand, tmp, free));
}
else if (t->content[*i] != '_' && !ft_isalpha(t->content[*i]))
{
tmp[0] = '$';
expand->content = tmp;
return (expand);
}
i_tmp = 0;
while (t->content[*i] == '_' || ft_isalnum(t->content[*i]))
tmp[i_tmp++] = t->content[*i++];
expand->content = getenv(tmp);
free(tmp);
if (expand->content)
expand->content = ft_strdup(expand->content);
else
expand->content = ft_calloc(1, 1);
if (!expand->content)
return (ft_retp_free(NULL, expand, free));
return (expand);
}

61
srcs/parsing/expansions/new_token_for_each_field.c Normal file
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@@ -0,0 +1,61 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* new_token_for_each_field.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/07 02:01:33 by lperrey #+# #+# */
/* Updated: 2021/11/07 04:33:04 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
t_list *ft_lstnew_generic(size_t lst_sizse, size_t content_size);
static t_token *insert_tokens(t_token *t, t_token *insert_lst);
int new_token_for_each_field(char **fields, t_token **t)
{
t_token head;
t_token *insert_lst;
int i;
head.next = NULL;
insert_lst = &head;
i = 0;
while (fields[i])
{
insert_lst->next = (t_token *)ft_lstnew_generic(sizeof(*insert_lst), 0);
if (!insert_lst->next)
{//todo wrap
perror("insert_token_for_each_field() error");
ft_free_2d_arr(fields);
return ((int)ft_lstclear((t_list **)&head.next, NULL));
}
insert_lst = insert_lst->next;
insert_lst->content = fields[i];
insert_lst->id = T_WORD;
}
free(fields);
*t = insert_tokens(*t, insert_lst);
return (1);
}
static t_token *insert_tokens(t_token *t, t_token *insert_lst)
{
t_token *tmp;
t_token *insert_lst_last;
t->id = 0;
free(t->content);
t->content = NULL;
tmp = t->next;
t->next = insert_lst;
insert_lst_last = (t_token *)ft_lstlast((t_list *)insert_lst);
insert_lst_last->next = tmp;
return (insert_lst_last);
}

39
srcs/parsing/expansions/rejoin_after_expand.c Normal file
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@@ -0,0 +1,39 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* rejoin_after_expand.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/07 02:01:33 by lperrey #+# #+# */
/* Updated: 2021/11/07 04:03:02 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
char *rejoin_after_expand(t_list *expand_lst)
{
t_list *head;
char *result;
head = expand_lst;
result = ft_calloc(1, 1);
if (!result)
{//todo wrap
perror("rejoin_after_expand() error");
return (ft_lstclear(&head, free));
}
while (expand_lst)
{
result = ft_strjoinfree_s1(result, expand_lst->content);
if (!result)
{//todo wrap
perror("rejoin_after_expand() error");
return (ft_lstclear(&head, free));
}
expand_lst = expand_lst->next;
}
ft_lstclear(&head, free);
return (result);
}

69
srcs/parsing/expansions/words_expansions.c Normal file
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@@ -0,0 +1,69 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* words_expansions.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/07 02:01:33 by lperrey #+# #+# */
/* Updated: 2021/11/07 04:36:52 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
enum e_in_quote_state
{
NOT_IN = 0,
IN_QUOTES = '\'',
IN_DQUOTES = '\"'
};
t_list *ft_lstnew_generic(size_t lst_sizse, size_t content_size);
t_list *expand_token(t_token *t);
char *rejoin_after_expand(t_list *expand_lst);
int new_token_for_each_field(char **fields, t_token **t);
// 1 - chaque bout dans un element d'une t_list
// (telle quelle si non expand, ou VARIABLE de env)
// 2 - strjoin() le tout
// 3 - split avec un ft_strplit() modifié (ne splitant pas dans les quotes)
// 4 - creer un token T_WORD pour chaque *string du **split_arr
// (ft_lstadd_front() sur le token original, puis set le token orignal à :
// t->id = 0 ; free(t->content) ; t->content = NULL ; pour qu'il soit ignoré sur la suite du parsing)
int words_expansions(t_token *t)
{
void *tmp_expand;
char **tmp_split;
while (t)
{
if (t->id == T_WORD)
{
// 1
tmp_expand = expand_token(t);
if (!tmp_expand)
return (0);
if (((t_list*)tmp_expand)->next)
{
// 2
tmp_expand = rejoin_after_expand(tmp_expand);
if (!tmp_expand)
return (0);
// 3 WIP PLACEHOLDER, MUST WRITE A ft_split_quoted() FOR NO SPLIT IN QUOTES
tmp_split = ft_split(tmp_expand, ' ');
free(tmp_expand);
if (!tmp_split)
return (0);
// 4
if (!new_token_for_each_field(tmp_split, &t))
return (0);
}
else
ft_lstclear((t_list **)&tmp_expand, free);
}
t = t->next;
}
return (1);
}

251
srcs/parsing/parsing.c
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@@ -6,14 +6,13 @@
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/10/24 10:52:40 by lperrey #+# #+# */
/* Updated: 2021/11/02 13:49:06 by hulamy ### ########.fr */
/* Updated: 2021/11/07 04:37:30 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
size_t count_pipes(t_token *token);
t_cmd **create_cmd(t_token *token_list, size_t cmd_nbr);
// HUGO WIP
void handle_argv(t_token *token, t_cmd **cmd, size_t cmd_nbr);
void handle_path(t_cmd **cmd_arr, char **envp);
void handle_fd(t_token *token, t_cmd **cmd_arr);
@@ -24,243 +23,35 @@ int handle_builtin(t_cmd *cmd);
int fill_builtin(t_cmd *cmd, int (*builtin)(int, char **, t_all *));
int next_cmd(t_token *token);
int is_redirection(enum e_token_id id);
// HUGO WIP
t_cmd **parsing(t_token *token_list, char **envp)
t_cmd **parsing(t_token *token_list)
{
t_cmd **cmd_arr;
size_t cmd_nbr;
if (!valid_syntax(token_list))
return (NULL);
cmd_nbr = count_pipes(token_list);
cmd_arr = create_cmd(token_list, cmd_nbr);
// Struct CMD alloc
cmd_arr = alloc_cmd_array(count_pipes(token_list) + 1);
if (!cmd_arr)
return (NULL);
// 2.9.1 - 2) Expansion
words_expansions(token_list);
// 2.9.1 - 3) Redirection
// Struct CMD fill
// HUGO WIP
// cmd_expansion(cmd_arr, envp);
handle_argv(token_list, cmd_arr, cmd_nbr);
handle_path(cmd_arr, envp);
handle_fd(token_list, cmd_arr);
// handle_argv(token_list, cmd_arr, cmd_nbr);
// handle_path(cmd_arr, envp);
// handle_fd(token_list, cmd_arr);
return (cmd_arr);
}
size_t count_pipes(t_token *token)
{
size_t nb;
nb = 0;
while (token)
{
if (token->id == T_PIPE)
nb++;
token = token->next;
}
return (nb + 1);
}
t_cmd **create_cmd(t_token *token_list, size_t cmd_nbr)
{
t_cmd **cmd_arr;
size_t i;
(void)token_list;
cmd_arr = ft_calloc(cmd_nbr + 1, sizeof(t_cmd *));
cmd_arr[cmd_nbr] = NULL;
i = 0;
while (i < cmd_nbr)
{
cmd_arr[i] = ft_calloc(1, sizeof(t_cmd));
ft_bzero(cmd_arr[i], sizeof(t_cmd));
i++;
}
return (cmd_arr);
}
int is_redirection(enum e_token_id id)
{
if (id == T_LESS) // <
return (1);
else if (id == T_GREAT) // >
return (1);
else if (id == T_DLESS) // <<
return (1);
else if (id == T_DGREAT) // >>
return (1);
else
return (0);
}
// count nbr word in cmd, minus redirection and heredoc
int next_cmd(t_token *token)
{
int i;
i = 0;
while (token && token->id != T_PIPE)
{
if (is_redirection(token->id))
i--;
else
i++;
token = token->next;
}
if (token && token->id == T_PIPE)
token = token->next;
return (i);
}
void handle_argv(t_token *token, t_cmd **cmd, size_t cmd_nbr)
{
int argc;
int j;
int i;
int redirection;
i = 0;
while (cmd_nbr)
{
argc = next_cmd(token);
cmd[i]->argv = calloc(argc + 1, sizeof(char *));
cmd[i]->argv[argc] = NULL;
j = 0;
redirection = is_redirection(token->id);
while (token && token->id != T_PIPE)
{
if (!redirection && token->id == T_WORD)
{
cmd[i]->argv[j] = ft_strdup(token->content);
j++;
}
redirection = is_redirection(token->id);
token = token->next;
}
if (token && token->id == T_PIPE)
token = token->next;
cmd_nbr--;
i++;
}
}
int fill_builtin(t_cmd *cmd, int (*builtin)(int, char **, t_all *))
{
cmd->builtin_command = &builtin;
return (1);
}
int handle_builtin(t_cmd *cmd)
{
if (!ft_strncmp(cmd->argv[0], "echo", 4))
return (fill_builtin(cmd, &builtin_echo));
// else if (!ft_strncmp(cmd->argv[0], "cd", 2))
// return (fill_builtin(cmd, &builtin_cd));
// else if (!ft_strncmp(cmd->argv[0], "pwd", 3))
// return (fill_builtin(cmd, &builtin_pwd));
// else if (!ft_strncmp(cmd->argv[0], "export", 6))
// return (fill_builtin(cmd, &builtin_export));
// else if (!ft_strncmp(cmd->argv[0], "unset", 5))
// return (fill_builtin(cmd, &builtin_unset));
else if (!ft_strncmp(cmd->argv[0], "env", 3))
return (fill_builtin(cmd, &builtin_env));
else if (!ft_strncmp(cmd->argv[0], "exit", 4))
return (fill_builtin(cmd, &builtin_exit));
return (0);
}
void find_path(char **argv, char **envp)
{
int i;
char **path;
char *cmd;
i = 0;
while (envp[i] && ft_strncmp(envp[i], "PATH=", 5))
i++;
path = ft_split(envp[i] + 5, ':'); // 5 = lentgh of "PATH="
i = -1;
while (*path && i != 0)
{
cmd = ft_strjoin(path[0], "/");
cmd = ft_strjoin(cmd, argv[0]);
i = access(cmd, X_OK);
path++;
}
if (!(*path))
exit(0); // gerer erreur
argv[0] = cmd;
}
void handle_path(t_cmd **cmd_arr, char **envp)
{
int i;
i = 0;
while (cmd_arr[i])
{
if (!handle_builtin(cmd_arr[i]))
find_path(cmd_arr[i]->argv, envp);
i++;
}
}
void fd_redirection(t_token *token, t_cmd *cmd)
{
int flag;
if (token->id == T_LESS) // '<'
{
flag = O_RDONLY | O_CREAT;
if (cmd->fd_in != 0)
close(cmd->fd_in);
cmd->fd_in = open(token->next->content, flag);
}
else if (token->id == T_GREAT) // '>'
{
flag = O_WRONLY | O_CREAT | O_TRUNC;
cmd->fd_out = open(token->next->content, flag, S_IRWXU);
}
else if (token->id == T_DGREAT) // '>>'
{
flag = O_WRONLY | O_CREAT | O_APPEND;
cmd->fd_out = open(token->next->content, flag, S_IRWXU);
}
}
void fd_heredoc(t_token *token, t_cmd *cmd)
{
(void)token;
(void)cmd;
}
void handle_fd(t_token *token, t_cmd **cmd_arr)
{
int *pipes_fd;
int i;
i = 0;
while (cmd_arr[i])
{
cmd_arr[i]->fd_out = 1;
while (token && token->id != T_PIPE)
{
if (token->id == T_DGREAT) // '<<'
fd_heredoc(token, cmd_arr[i]);
else
fd_redirection(token, cmd_arr[i]);
token = token->next;
}
if (token && token->id == T_PIPE)
{
token = token->next;
pipes_fd = calloc(2, sizeof(int));
pipe(pipes_fd);
if (cmd_arr[i]->fd_out == 1)
cmd_arr[i]->fd_out = pipes_fd[1];
else
close(pipes_fd[1]);
cmd_arr[i + 1]->fd_in = pipes_fd[0];
}
i++;
}
}
/* -------------------------------------------------------
The grammar symbols
------------------------------------------------------- */

0
srcs/parsing/valid_command.c → srcs/parsing/valid_syntax/valid_command.c
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srcs/parsing/valid_io_redirect.c → srcs/parsing/valid_syntax/valid_io_redirect.c
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srcs/parsing/valid_pipeline.c → srcs/parsing/valid_syntax/valid_pipeline.c
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srcs/parsing/valid_syntax.c → srcs/parsing/valid_syntax/valid_syntax.c
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