1 files changed, 62 insertions, 0 deletions
diff --git a/src/eval/exec.c b/src/eval/exec.c
new file mode 100644
index 0000000..1ac9754
--- /dev/null
+++ b/src/eval/exec.c
@@ -0,0 +1,62 @@
+/**
+** \file   exec.c
+** \brief  Executable name and path
+*/
+
+#include "eval.h"
+
+/**
+** \brief             Check if executable name is already a path
+** \param exec_name   Executable name
+** \return            True if valid
+*/
+
+bool	exec_is_path(char *exec_name)
+{
+	return (ft_strncmp(exec_name, "../", 3) == 0
+			|| ft_strncmp(exec_name, "./", 2) == 0
+			|| ft_strncmp(exec_name, "/", 1) == 0);
+}
+
+/**
+** \brief             Check if executable path is valid
+** \param exec_path   Executable path
+** \return            True if valid
+*/
+
+bool	exec_is_valid(char *exec_path)
+{
+	struct stat	statbuf;
+
+	if (stat(exec_path, &statbuf) != 0)
+		return (false);
+	if (!S_ISREG(statbuf.st_mode)) // also need to manage link
+		return (false);
+	// could test permission but probably handled by execve
+	return (true);
+}
+
+/**
+** \brief              Search executable name in path
+** \param path         Path hash table
+** \param path_var     Path environment string in case we need to update path
+** \param exec_name    Executable name to search
+** \return             Executable path or NULL if not found or path update error
+*/
+
+char	*exec_search_path(t_path path, char *path_var, char *exec_name)
+{
+	char			*exec_path;
+
+	if (exec_is_path(exec_name))
+		return (exec_name);
+	// try current first
+	if ((exec_path = ft_htget(path, exec_name)) == NULL)
+	{
+		if (path_update(path, path_var) == NULL)  // optimise by not updating not changed path in ht
+			return (NULL);
+		if ((exec_path = ft_htget(path, exec_name)) == NULL)
+			return (NULL);
+	}
+	return (exec_path);
+}