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Homework and Emergencies Homework & Coursework Questions Using C language to use system calls Post 302734105 by femchi on Wednesday 21st of November 2012 03:09:13 PM

11-21-2012

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Using C language to use system calls

I need to write a C program (not a C++ program) that allows some tasks to be preformed automatically from a menu-driven interface. Automate the following tasks:
1. Rename a file
2. Delete a file or a directory
3. Output Process Information
4. Execute �mode 644 ls -l�
5. Exit

I need to know what steps should I follow to achieve the result. is it possible to ask the user to enter all the names and commands in 1 line or I should ask him one by one.
thank you

Code:

#include <stdio.h>
#include <fcntl.h>
#include <sys/errno.h>

int main (void) 
{
	int ch;
	char oldfn;
	char newfn;
	
	printf("\tMenu:\n");
	printf("\t1: Rename a file\n");
	printf("\t2: Delete a file or a directory\n");
	printf("\t3: Output Process Information\n");
	printf("\t4: Execute \"mode 644 ls -l\"\n");
	printf("\t5: Exit\n");
	printf("\t Enter your choice: \n");
	scanf("%d",&ch); 
	do
	{
		switch (ch)
		{
			case 1:printf("Enter the name of file and the new name :\n");
			printf("old file name: ");
			scanf("%s",&oldfn);
			printf("new file name: ");
			scanf("%s",&newfn);
			if ( rename(const char *oldfn, const char *newfn) == 0  )
			{
				printf("file is renamed");
			}
			break;
			case 2:printf("case 2\n");
			break;
			case 3:printf("case 3\n");
			break;
			case 4:printf("case 4\n");
			break;
			case 5:printf("exit\n");
			break;
			default:printf("Enter a number between 1-5\n");
			exit(0);
		}
		scanf("%d",&ch);
		
	}
	while ((ch>=1)||(ch<=5));
		
}

Langara college, Vancouver, Canada - Miss Hengame Hamavand - CPSC 1280

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install-menu

install-menu(1) 					      Debian GNU/Linux manual						   install-menu(1)

NAME

       install-menu - Process a menu method and generate the menu files for a window manager or a menu-aware application.

DESCRIPTION

       update-menus(1) computes the list of menu entries and passes it in turn to the menu methods in /etc/menu-methods/. The task of a menu meth-
       ods is to generate menus for a specific window manager.	install-menu provides a generic and customizable way to do that. The documentation
       of the install-menu definition language is available in the Debian Menu manual, a local copy being available in /usr/share/doc/menu/html.

SYNOPSIS

       install-menu [-vh] [--remove] <menu-method>

       Read menu entries from stdin in update-menus --stdout format and generate menu files using the specified menu-method.

       Normally used in menu method scripts as #! /usr/bin/install-menu.

OPTIONS

       -h,--help
	      Show the help message and exit.

       --remove
	      Remove the menu files instead of generating them.

       -v,--verbose
	      Output messages about what the program is doing.

COPYING

       install-menu is distributed under the term of the GNU General Public License version 2, or (at your option) any later version.

AUTHOR

       Written by Joost Witteveen <joostje@debian.org>.  Now maintained by Bill Allombert <ballombe@debian.org>.

SEE ALSO

       update-menus(1), menufile(5), /usr/share/doc/menu/html

Debian Project							 28 November 2005						   install-menu(1)