builtin_export.c File Reference

Implements export: sets and displays env variables. More...

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

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Detailed Description

Implements export: sets and displays env variables.

Definition in file builtin_export.c.

Functions
static int	is_valid_identifier (char *str)
	Validate an export identifier (KEY or KEY= or KEY+=) More...
static void	print_export_error (char *arg)
	Print export error. More...
static int	export_one (char *arg, t_env **env)
	Process an export argument. More...
int	builtin_export (char **args, t_env **env)
	Implement the export command. More...

Function Documentation

is_valid_identifier()

static int is_valid_identifier ( char *  str )

static

Validate an export identifier (KEY or KEY= or KEY+=)

• Must start with alpha or _, followed by alnum or _
• A + is allowed only immediately right before =

Parameters

str	String to validate

Returns

1 if valid and 0 otherwise

Definition at line 26 of file builtin_export.c.

Referenced by export_one().

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print_export_error()

static void print_export_error ( char *  arg )

static

Print export error.

Parameters

arg	The invalid argument string

Definition at line 56 of file builtin_export.c.

Referenced by export_one().

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export_one()

static int export_one ( char *  arg, t_env **  env  )

static

Process an export argument.

Parameters

arg	Argument string (KEY=value, KEY+=value or KEY)
env	Pointer to env list head

Returns

0 on success and 1 or 2 on error

Definition at line 70 of file builtin_export.c.

References export_append(), export_assign(), export_no_value(), is_valid_identifier(), and print_export_error().

Referenced by builtin_export().

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builtin_export()

int builtin_export	(	char **	args,
		t_env **	env
	)

Implement the export command.

• With no arguments it prints all env vars sorted by alphabetical order in "declare -x" format
• With arguments it exports each 1 (support for =, += and no value formats)

Parameters

args	NULL terminated arg array with arg[0] = "export"
env	Pointer to env list head (modified on export)

Returns

0 on success or highest error code from the processed args

Definition at line 99 of file builtin_export.c.

References export_one(), and print_sorted_export().

Referenced by exec_builtin().

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