This is our group owned simple shell in C language.

Shell is a user interface to use the services of a computer. It can be a command-line interface –the one we will build- or graphical user interface, like regular software such as Windows Office.

This simple shell is compiled with:

gcc -Wall -Werror -Wextra -pedantic -std=gnu89 *.c -o hsh

This program have exact same output as sh as well as the exact same error output. The only difference is when it prints an error, the name of the program is equivalent to argv[0].

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

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

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

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

$ /bin/pwd /home/vagrant/shell $ ls -la total 108**

• -rw-r--r-- 1 abel 22691 487 May 5 10:10 _dollar_special.c
• -rw-r--r-- 1 abel 22691 824 May 5 10:23 _get_history_lines_count.c
• -rw-r--r-- 1 abel 22691 363 May 5 10:30 _getenv.c*
• -rw-r--r-- 1 abel 22691 818 May 5 10:39 _handle_var_replacement.c
• -rw-r--r-- 1 abel 22691 1745 May 5 10:45 _help.c
• -rw-r--r-- 1 abel 22691 1587 May 5 11:06 _history.c
• -rw-r--r-- 1 abel 22691 750 May 5 11:15 _own_memory.c
• -rw-r--r-- 1 abel 22691 232 May 5 11:24 _puts.c
• -rw-r--r-- 1 abel 22691 351 May 5 11:36 _strcpy.c
• -rw-r--r-- 1 abel 22691 448 May 5 11:43 _strncpy.c
• -rw-r--r-- 1 abel 22691 1327 May 5 11:59 _strtok.c
• -rw-r--r-- 1 abel 22691 491 May 5 12:19 _write_history.c
• -rw-r--r-- 1 abel 22691 158 May 5 12:33 AUTHORS
• -rw-r--r-- 1 abel 22691 3978 May 6 11:15 builtins.c
• -rw-r--r-- 1 abel 22691 3934 May 6 11:16 f_alias_list.c
• -rw-r--r-- 1 abel 22691 1083 May 6 11:16 f_builtin_utils.c
• -rw-r--r-- 1 abel 22691 3018 May 6 11:16 f_command_handlers.c
• -rw-r--r-- 1 abel 22691 754 May 6 11:14 f_error.c
• -rw-r--r-- 1 abel 22691 1372 May 6 11:15 f_exit.c
• -rw-r--r-- 1 abel 22691 1910 May 6 11:15 f_handle_builtins.c
• -rw-r--r-- 1 abel 22691 502 May 6 11:14 f_handle_comment.c
• -rw-r--r-- 1 abel 22691 316 May 6 11:16 f_handle_enter.c
• -rw-r--r-- 1 abel 22691 4138 May 6 11:21 f_handle_shell_logical_operators.c
• -rw-r--r-- 1 abel 22691 1271 May 7 11:21 f_linked_lists.c
• -rw-r--r-- 1 abel 22691 1399 May 7 11:19 f_memory.c
• -rw-r--r-- 1 abel 22691 727 May 7 11:17 f_special.c
• -rw-r--r-- 1 abel 22691 1809 May 7 11:17 f_strings.c
• -rw-r--r-- 1 abel 22691 1238 May 7 11:17 f_strings_creations.c
• -rw-r--r-- 1 abel 22691 1002 May 7 11:18 f_strings2.c
• -rw-r--r-- 1 abel 22691 2156 May 7 11:18 main.c
• -rw-r--r-- 1 abel 22691 1752 May 7 11:37 man_1_simple_shell
• -rw-r--r-- 1 abel 22691 2657 May 7 11:37 README.md
• -rw-r--r-- 1 abel 22691 4088 May 7 11:25 shell.h $ Eth5
• ./hsh: No such file or directory

Abel Yitages Nebil Abdulfetah