Description: Parameters to achieve a simple shell 1, apart from the system call execve, not allowed to use other exec functions. Input should be allowed to take multiple parameters (one line can be expressed), without considering a wildcard (ie, "*" ," ?" ,"-" , etc.) processing. 2, typographical errors, the command will prompt an error and enter the next round of the state to receive the command. 3, you can use Ctrl-C and Ctrl-\ the end of a simple shell operation. 4, the program is running correctly, suggesting that clear and simple.
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shell.c
apue.h
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