update(exec): add error 'is a directory'

habvi / 42_minishell

Re-implemented a simple shell.

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Closed ak0327 closed 1 year ago

ak0327 commented 1 year ago

[x] error 'Is a directory' (status=126) を追加
- exec_pathをis_a_directory()で検査し、directoryであればstrerror(EISADIR)を出力

issue #252