env_conversion.c File Reference

Converts env linked list to envp array. More...

#include "env.h"
#include "libft.h"

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Detailed Description

Converts env linked list to envp array.

Definition in file env_conversion.c.

Functions
static char *	create_env_string (t_env *node)
	Convert an env node to a "KEY=value" string. More...
static void	free_incomplete_array (char **arr, int count)
	Free a partially filled array. More...
static int	fill_env_array (char **arr, t_env *env, int size)
	Fill an array with KEY=value strings. More...
char **	env_to_array (t_env *env)
	Convert the env linked list to a NULL terminated string array. More...

Function Documentation

create_env_string()

static char* create_env_string ( t_env *  node )

static

Convert an env node to a "KEY=value" string.

Joins node->key + = + node->value. If value is NULL, the result is KEY= with no value

Parameters

node	Environment node to convert

Returns

Newly allocated KEY=value string or NULL on failure

Definition at line 25 of file env_conversion.c.

References t_env::key, and t_env::value.

Referenced by fill_env_array().

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free_incomplete_array()

static void free_incomplete_array ( char **  arr, int  count  )

static

Free a partially filled array.

Used for cleanup when fill_env_array() fails in the middle

Parameters

arr	Array to free
count	Number of entries to free

Definition at line 51 of file env_conversion.c.

Referenced by fill_env_array().

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fill_env_array()

static int fill_env_array ( char **  arr, t_env *  env, int  size  )

static

Fill an array with KEY=value strings.

Iterate through the env list while converting each node to a string

• On allocation failure free all previously created strings via free_incomplete_array() and return 0

Parameters

arr	Pre allocated array of size + 1 pointers
env	List head
size	Number of nodes to convert

Returns

1 on success and 0 on allocation failure

Definition at line 76 of file env_conversion.c.

References create_env_string(), free_incomplete_array(), and t_env::next.

Referenced by env_to_array().

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env_to_array()

char** env_to_array

(

t_env *

env

)

Convert the env linked list to a NULL terminated string array.

Builds a char** destined to execve(). Each entry is in a KEY=value string

• If the list is empty or NULL, it returns an array containing only NULL

Parameters

env

List head

Returns

NULL terminated KEY=value array or NULL on allocation failure

Definition at line 107 of file env_conversion.c.

References env_list_size(), and fill_env_array().

Referenced by prepare_exec().

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