This project simulates a Linux shell, incorporating nearly all standard functionalities and additional extensions. I have done this project for CENG334: Operating Systems course. Implementation details are explained in this pdf.
- Executes Linux commands
- Supports piping.
- Supports parallel execution.
- Supports sequential execution.
- Supports subshells
- No memory leaks, no zombie processes.
I'm not counting parser.h and parser.c here because it was written by TA.
| Language | Files | Lines | Code | Comments | Blanks |
|---|---|---|---|---|---|
| C Header | 2 | 53 | 44 | 0 | 9 |
| C++ | 3 | 386 | 349 | 18 | 19 |
| Makefile | 1 | 3 | 3 | 0 | 0 |
| Total | 6 | 442 | 396 | 18 | 28 |
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
echo 'find . -name "*.txt" | sort ' | ./eshell |
6.8 ± 1.7 | 3.7 | 10.4 | 1.00 |
echo 'find . -name "*.txt" | sort ' | bash |
10.7 ± 0.9 | 7.9 | 11.9 | 1.58 ± 0.42 |
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|---|---|---|---|---|
echo 'ls -R / | sort | wc -l ' | ./eshell |
2.940 ± 0.143 | 2.801 | 3.146 | 1.00 |
echo 'ls -R / | sort | wc -l' | bash |
3.152 ± 0.025 | 3.116 | 3.182 | 1.07 ± 0.05 |
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|---|---|---|---|---|
echo '/bin/rg -r -e "error" /home/bahadir/' | ./eshell |
7.923 ± 1.670 | 5.747 | 10.942 | 1.00 |
echo '/bin/rg -r -e "error" /home/bahadir/' | bash |
8.180 ± 1.580 | 6.560 | 11.706 | 1.03 ± 0.30 |
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|---|---|---|---|---|
echo 'uptime; df -h; free -m | tr /a-z/ /A-Z/' | ./eshell |
12.7 ± 1.8 | 10.0 | 16.2 | 1.00 |
echo 'uptime; df -h; free -m | tr /a-z/ /A-Z/' | bash |
14.3 ± 3.2 | 4.3 | 17.2 | 1.12 ± 0.29 |