city_manager

Run this project in an Ubuntu terminal.

Build:

gcc utils.c commands.c main.c -o city_manager

Run:

./city_manager --role <role> --user <user> <command> ...

Roles:

• manager
• inspector

Common requirements:

• --role <role> and --user <user> are required for every command.
• The program creates the district directory and required files automatically if they do not exist.

Commands:

1. --add <district_id> Adds a new report to <district_id>/reports.dat. Usage:

./city_manager --role <role> --user <user> --add <district_id>

Permissions needed:

• Requires write permission on reports.dat
• Works for roles that can write to reports.dat

2. --list <district_id> Lists all reports from the district and shows file information. Usage:

./city_manager --role <role> --user <user> --list <district_id>

Permissions needed:

• Requires read permission on reports.dat

3. --view <district_id> <report_id> Shows full details for a single report. Usage:

./city_manager --role <role> --user <user> --view <district_id> <report_id>

Permissions needed:

• Requires read permission on reports.dat

4. --remove_report <district_id> <report_id> Removes one report from the district. Usage:

./city_manager --role manager --user <user> --remove_report <district_id> <report_id>

Permissions needed:

• Manager only
• Requires write permission on reports.dat

5. --update_threshold <district_id> <value> Updates the severity threshold stored in <district_id>/district.cfg. Usage:

./city_manager --role manager --user <user> --update_threshold <district_id> <value>

Permissions needed:

• Manager only
• Requires write permission on district.cfg

6. --filter <district_id> <condition> [condition ...] Prints only reports that match all given conditions. Usage:

./city_manager --role <role> --user <user> --filter <district_id> <condition> [condition ...]

Permissions needed:

• Requires read permission on reports.dat

Condition format:

field:operator:value

Supported fields:

• severity
• category
• inspector
• timestamp

Supported operators:

• ==
• !=
• <
• <=
• >
• >=

Examples:

./city_manager --role manager --user alice --filter downtown severity:>=:2
./city_manager --role inspector --user bob --filter downtown category:==:road inspector:!=:alice

Windows note:

• In Windows terminals, especially PowerShell, filter conditions that contain operators should be wrapped in quotes.
• Example:

.\city_manager --role manager --user alice --filter downtown "severity:>=:2" "category:==:road"

Created files and permissions:

• District directory: 0750
• reports.dat: 0664
• district.cfg: 0640
• logged_district: 0644