echo() & noecho()

[sharonenoch]

hi

i am facing a situation like this. Its like i am writing a program to insert a user and his password. but i dont want the password to be echoed on the screen

since i was familiar with ncurses i tried out this logic of using echo() and no echo() commands in the code like this

fprintf(handle->outFile,"Enter the password : ");
noecho();
fscanf(handle->inFile, "%s",firstpasswd);
echo();
fprintf(handle->outFile,"Confirm the password : ");
noecho();
fscanf(handle->inFile, "%s",secondpasswd);
echo();

i added the -lcurses option in the makefile

But while compiling i got an error such as this,

/usr/data/Common/include/dtype.h:74: error: syntax error before numeric constant

where the code in that include file was like this

#ifndef _C_PLUS_PLUS_
	#ifdef CORE_TYPES_H
		#undef false
		#undef true
	#endif

	typedef enum _Bool_E
	{
		false = 0,(line no:74)
	//	FALSE = 0,
		true = 1
	//	TRUE = 1

	} Bool_E;
#else

	typedef enum _Bool_E
	{
		FALSE = 0,
		TRUE = 1
	} Bool_E;
#endif

I guess this error is because curses has already defined values for false and true, and i am redefining it over here.

I cannot afford to make a change in the .h file since if i do, i will have to change the code at a lot of places ( over a 500 as it is already existing code) which is not possible

Is there any other method i can go about this issue?

Regards

Sharon

[sharonenoch]

i solved the problem by working it out another way. but i think it is a roundabout way. but it is ok for now

I wrote a function called getpasswd(char * passwd)

int getpasswd(char* passwd)
{
	int i=0;
	int g=0;
	char password[64];
	struct termios org_opts, new_opts;
	int res=0;

   while&#40;i<64&#41;
    &#123;
    	//-----  store old settings -----------
		res=tcgetattr&#40;STDIN_FILENO, &org_opts&#41;;
		assert&#40;res==0&#41;;
		  //---- set new terminal parms --------
		memcpy&#40;&new_opts, &org_opts, sizeof&#40;new_opts&#41;&#41;;
		new_opts.c_lflag &= ~&#40;ICANON | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOKE | ICRNL&#41;;
		tcsetattr&#40;STDIN_FILENO, TCSANOW, &new_opts&#41;;
		g=getchar&#40;&#41;;
		  //------  restore old settings ---------
		res=tcsetattr&#40;STDIN_FILENO, TCSANOW, &org_opts&#41;;
		assert&#40;res==0&#41;;

		if&#40;g!='\n' && g !='\r'&#41;
		&#123;
			password&#91;i&#93;=g;
			i++;
		&#125;
		else
		&#123;
			break;
		&#125;
	&#125;
	password&#91;i&#93;='\0';
	strcpy&#40;passwd,password&#41;;
	return 0;

&#125;

and i just called this from where i wanted to get the password.

fscanf(handle->inFile, "%s",firstpasswd);

Instead i used

fprintf(handle->outFile,"Enter the password : ");
getpasswd(firstpasswd);
fprintf(handle->outFile,"\nConfirm the password : ");
getpasswd(secondpasswd);

if anyone knows of a better way to do this please let me know.
ok

[jim mcnamara]

Gee. You went to a lot of work - getpass() in unistd.h is part of the standard library. It supresses echoing on a variety of terminal types.

[sharonenoch]

cool jim,

i did not know about that function, anyway now i know thanks to u.

Will implement that and see. since i read the man page and seems it will work for my program

thanks