0x16. C - Simple Shell

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a simple REPL model of the unix shell

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Contributor

Name	Email
me	olaleyedaniel2000@gmail.com

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Output

• The shell have exact same output as the sh (/bin/sh)
• The only difference is when you print an error, the name of the program must be equivalent to your argv[0] (See below)

Example of an error in sh

$ echo "qwerty" | /bin/sh
/bin/sh: 1: qwerty: not found
$ echo "qwerty" | /bin/../bin/sh
/bin/../bin/sh: 1: qwerty: not found
$

Example of an error on the program seashell

$ echo "qwerty" | ./seashell
./seashell: 1: qwerty: not found
$ echo "qwerty" | ./././seashell
./././seashell: 1: qwerty: not found
$

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Compilation

The program should be compiled with

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c utils/*.c -o seashell

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Testing

Your code should work like this in interactive mode

$ ./seashell
($) /bin/ls
seashell main.c shell.c
($)
($) exit
$

But also in non-interactive mode

$ echo "/bin/ls" | ./seashell
seashell main.c shell.c test_ls_2
$
$ cat test_ls_2
/bin/ls
/bin/ls
$
$ cat test_ls_2 | ./seashell
seashell main.c shell.c test_ls_2
seashell main.c shell.c test_ls_2
$