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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* p_redirs.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:19:27 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:19:29 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <stddef.h>
#include <unistd.h>
#ifdef __linux__
# include <linux/limits.h>
#else
# include <limits.h>
#endif
#include "d_define.h"
#include "p_redirs.h"
#include "p_redirs_heredoc.h"
#include "s_lredir.h"
#include "s_struct.h"
#include "s_lredir.h"
#include "u_utils.h"
#include "u_parse.h"
#include "u_vars.h"
static unsigned char p_append_redir(const char path[],
int fd_rdr[],
t_com *com,
t_msh *msh)
{
struct s_lredir *new;
int fd;
char redir;
fd = fd_rdr[FD];
redir = fd_rdr[RDR];
new = s_lredir_new(path, fd, redir);
if (new == NULL)
{
return (1);
}
new->heredoc = NULL;
if (redir == -2 || redir == -3)
{
new->heredoc = p_get_heredoc(path, redir, msh);
}
s_lredir_add_back(&com->rdr, new);
return (0);
}
static size_t p_get_path(char path[],
struct s_rdr_tmp tmp,
t_msh *msh)
{
char h[PATH_MAX];
size_t pos[2];
size_t hlen;
size_t len;
hlen = 0;
tmp.ptr += (tmp.redir == 3) ? (2) : (ft_abs(tmp.redir));
while (*tmp.ptr != C_NUL && ft_iswhitespace(*tmp.ptr) == TRUE)
tmp.ptr++;
if (*tmp.ptr == C_TILDE && u_get_var_value(h, "$HOME", PATH_MAX, msh) == 0)
{
ft_strlcpy(path, h, PATH_MAX);
hlen = ft_strlen(h);
tmp.ptr++;
}
pos[0] = (tmp.ptr - tmp.word);
while (*tmp.ptr != C_NUL && ft_iswhitespace(*tmp.ptr) == FALSE
&& u_is_not_escaped(tmp.word, tmp.ptr) == TRUE)
tmp.ptr++;
pos[1] = (tmp.ptr - tmp.word);
len = (pos[1] - pos[0]);
len = ((hlen + len + 1) > PATH_MAX) ? (PATH_MAX - 1) : (len);
ft_strlcpy(path + hlen, tmp.word + pos[0], len + 1);
return (pos[1]);
}
static int p_get_fd(const char word[], char *ptr)
{
char digit[255];
char *tmp;
if (*ptr == '<' || (ptr - word) == 0)
return (-1);
tmp = ptr;
tmp -= 1;
if (ft_isdigit(*tmp) == FALSE)
return (0);
while ((tmp - word) > 0 && ft_isdigit(*tmp) == TRUE)
tmp--;
if ((tmp - word) > 0 && ft_iswhitespace(*tmp) == FALSE)
return (0);
if (ft_atoi(tmp) == 1 || ft_atoi(tmp) == 0)
return (-2);
else
{
tmp += ((tmp - word) > 0) ? (1) : (0);
ft_strlcpy(digit, word + (tmp - word), (ptr - tmp) + 1);
}
return (ft_atoi(digit));
}
static unsigned char p_get_redir(char word[],
char *ptr,
t_com *com,
t_msh *msh)
{
struct s_rdr_tmp tmp;
char path[PATH_MAX];
size_t pos[2];
int fd_rdr[2];
pos[0] = 0;
if ((fd_rdr[FD] = p_get_fd(word, ptr)) == -1)
fd_rdr[FD] = STDOUT_FILENO;
fd_rdr[RDR] = (*ptr == '>') ? (1) : (-1);
fd_rdr[RDR] = (fd_rdr[RDR] == 1 && *(ptr + 1) == '>') ? (2) : (fd_rdr[1]);
fd_rdr[RDR] = (fd_rdr[RDR] == 1 && *(ptr + 1) == '&') ? (3) : (fd_rdr[1]);
fd_rdr[RDR] = (fd_rdr[RDR] == -1 && *(ptr + 1) == '<') ? (-2) : (fd_rdr[1]);
fd_rdr[RDR] = (fd_rdr[RDR] == -2 && *(ptr + 2) == '-') ? (-3) : (fd_rdr[1]);
pos[0] = (fd_rdr[FD] == STDOUT_FILENO) ?
(ptr - word) : ((ptr - word) - ft_intlen(fd_rdr[FD]));
pos[0] = (fd_rdr[FD] == -2) ? ((ptr - word) - 1) : (pos[0]);
fd_rdr[FD] = (fd_rdr[FD] == -2) ? (STDOUT_FILENO) : (fd_rdr[FD]);
tmp.word = word;
tmp.ptr = ptr;
tmp.redir = fd_rdr[RDR];
pos[1] = p_get_path(path, tmp, msh);
(void)ft_memmove(word + pos[0],
word + pos[1], (ft_strlen(word + pos[1]) + 1) * sizeof(char));
return (p_append_redir(path, fd_rdr, com, msh));
}
char p_redirs(char word[], t_com **com, t_msh *msh)
{
char *ptr;
t_quote_mode mode;
mode = Q_NONE;
ptr = (char *)word;
while (*ptr != C_NUL)
{
if (*ptr == C_DQUOTE)
mode = u_meet_dquote(word, ptr, mode);
else if (*ptr == C_SQUOTE)
mode = u_meet_squote(word, ptr, mode);
else if (mode == Q_NONE && (*ptr == '<' || *ptr == '>') == 1
&& u_is_not_escaped(word, ptr) == TRUE)
{
if (p_get_redir(word, ptr, *com, msh) != 0)
return (1);
ptr = word;
}
ptr++;
}
return (0);
}
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