1, this source code I wrote, non-GNU source code, do not be not able to meet everyone that put this to the exchange of only two, this source code is not complete, shell functions are not achieved a lot of knowledge to achieve a number of The main function of three to achieve the following functions: a, enter the command, and run the b, to achieve if, and while the deep nested c, achieving environmental variables, and the shell itself, the variable d, to achieve piping and redirection functions. 4, due to capacity problems, the program may be an error, please master pointing.

shell.finish\embedded_cmd.c
............\if_cmd.c
............\input_cmd.c
............\my_environ.c
............\shell.c
............\shell.h
............\var_replace.c
shell.finish

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