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minishell_utils.c
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minishell_utils.c
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* minishell_utils.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: bsyvasal <[email protected]> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/01/25 16:19:48 by vshchuki #+# #+# */
/* Updated: 2024/02/26 15:22:10 by bsyvasal ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
int shlvl_increment(t_pipe *data)
{
int i;
int shlvl;
char *shlvl_str;
i = -1;
shlvl_str = getenv("SHLVL");
if (shlvl_str && (shlvl_str[0] == '-' || shlvl_str[0] == '+'))
i++;
while (shlvl_str && ft_isdigit(shlvl_str[++i]))
;
if (!shlvl_str || shlvl_str[i] != '\0')
return (export(data, ft_strdup("SHLVL=1")));
shlvl = ft_atoi(shlvl_str);
if (shlvl < 0)
return (export(data, ft_strdup("SHLVL=0")));
shlvl_str = ft_itoa(shlvl + 1);
if (!shlvl_str)
return (1);
i = export(data, ft_strjoin("SHLVL=", shlvl_str));
free(shlvl_str);
return (i);
}
/**
* @return size of the double dimension string array, for example,
* created by ft_split().
*/
int sizeof_arraylist(char **arraylist)
{
int j;
j = 0;
while (arraylist[j])
{
j++;
}
return (j);
}
/**
* Used to copy double dimension array arr1 to arr2.
* For example, envp.
*/
char **copy_arraylist(char **arr1, int increase_size)
{
int size;
int i;
int len;
char **arr2;
i = 0;
size = sizeof_arraylist(arr1);
arr2 = (char **)ft_calloc((size + 1 + increase_size), sizeof(char *));
if (!arr2)
return (NULL);
while (i < size)
{
len = (ft_strlen(arr1[i]) + 1);
arr2[i] = (char *)ft_calloc(len, sizeof(char));
if (!arr2[i])
{
freeall(arr2);
return (NULL);
}
ft_memmove(arr2[i], arr1[i], len);
i++;
}
return (arr2);
}
/**
* Reallocates the arraylist when some elements are deleted
* DO NOT use for increased size list.
* @param newsize is the size of the new array
*/
char **reallocate_arraylist(char **arr, int newsize)
{
char **new_arr;
int i;
int j;
new_arr = (char **)ft_calloc((newsize + 1), sizeof(char *));
if (!new_arr)
return (NULL);
i = 0;
j = 0;
while (j < newsize)
{
if (arr[i])
new_arr[j++] = arr[i];
i++;
}
free(arr);
return (new_arr);
}
/**
* Replaces all pipe char (|) inside prompt line to a special char (31) for
* the split avoiding pipe chars (|) inside quotes stay unaffected.
*/
int replace_pipes(char *cmd)
{
int i;
int count;
int valid;
i = -1;
count = 0;
valid = 0;
while (cmd[++i])
{
if (cmd[i] != '|' && ft_isprint(cmd[i]) && !ft_isspace(cmd[i]))
valid = 1;
if (cmd[i] == '|')
{
if (!valid || cmd[i + 1] == '|')
return (write(2, "bvsh: syntax error "
"near unexpected token `|'\n", 46) - 47);
cmd[i] = 31;
count++;
valid = 0;
}
if ((cmd[i] == '\'' || cmd[i] == '"')
&& get_quote_length(&cmd[i], cmd[i]) != 1)
i += get_quote_length(&cmd[i], cmd[i]) - 1;
}
return (count);
}