path.c File Reference

Command path resolution: searches PATH & validates permissions. More...

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

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Detailed Description

Command path resolution: searches PATH & validates permissions.

Definition in file path.c.

Functions
static int	is_direct_path (char *cmd)
	Check if a command contains a slash (= direct path) More...
static char *	join_path (char *dir, char *cmd)
	Join a directory and command name with a / in between. More...
char *	search_in_dir (char *dir, char *cmd)
	Search an executable command in a directory. More...
static char *	search_in_path (char *cmd, char *path_var)
	Search for a command in all PATH directories. More...
char *	find_cmd_path (char *cmd, t_env *env)
	Resolve a command name into its full executable path. More...

Function Documentation

is_direct_path()

static int is_direct_path ( char *  cmd )

static

Check if a command contains a slash (= direct path)

Parameters

cmd	Command to check

Returns

1 if cmd contains / and 0 if not

Definition at line 23 of file path.c.

Referenced by find_cmd_path().

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join_path()

static char* join_path ( char *  dir, char *  cmd  )

static

Join a directory and command name with a / in between.

Parameters

dir	Directory path
cmd	Command name

Returns

Newly allocated "dir/cmd" string or NULL

Definition at line 39 of file path.c.

Referenced by search_in_dir().

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search_in_dir()

char* search_in_dir	(	char *	dir,
		char *	cmd
	)

Search an executable command in a directory.

Joins dir and cmd then checks if their result is executable via access(X_OK)

Parameters

dir	Directory to search in
cmd	Command name to look for

Returns

Full path if found AND executable or NULL

Definition at line 61 of file path.c.

References join_path().

Referenced by find_cmd_path(), and search_in_path().

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search_in_path()

static char* search_in_path ( char *  cmd, char *  path_var  )

static

Search for a command in all PATH directories.

Splits the PATH variable (by :) and tries each directory

Parameters

cmd	Command name to search for
path_var	Value of the PATH environment variable

Returns

Full path to the executable or NULL if not found

Definition at line 85 of file path.c.

References search_in_dir().

Referenced by find_cmd_path().

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find_cmd_path()

char* find_cmd_path	(	char *	cmd,
		t_env *	env
	)

Resolve a command name into its full executable path.

If the command contains / it's treated as a direct path. Otherwise it looks up PATH in env and searches each directory until an executable match is found

Parameters

cmd	Command name or path to resolve
env	Environment list

Returns

Full path, CWD match if PATH is unset or NULL if not found

Definition at line 115 of file path.c.

References get_env_value(), is_direct_path(), search_in_dir(), and search_in_path().

Referenced by prepare_exec().

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