08-14-2008
yes am looking for something where the user will not be able to enter more than 50 chars at the prompt
like...
echo "Enter string"
name string
here I need some code where it will beep or stop when the user tries to key-in 51st char
thanks
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LEARN ABOUT OSX
des_read_2passwords
ui_compat(3) OpenSSL ui_compat(3)
NAME
des_read_password, des_read_2passwords, des_read_pw_string, des_read_pw - Compatibility user interface functions
SYNOPSIS
#include <openssl/des_old.h>
int des_read_password(DES_cblock *key,const char *prompt,int verify);
int des_read_2passwords(DES_cblock *key1,DES_cblock *key2,
const char *prompt,int verify);
int des_read_pw_string(char *buf,int length,const char *prompt,int verify);
int des_read_pw(char *buf,char *buff,int size,const char *prompt,int verify);
DESCRIPTION
The DES library contained a few routines to prompt for passwords. These aren't necessarely dependent on DES, and have therefore become
part of the UI compatibility library.
des_read_pw() writes the string specified by prompt to standard output turns echo off and reads an input string from the terminal. The
string is returned in buf, which must have spac for at least size bytes. If verify is set, the user is asked for the password twice and
unless the two copies match, an error is returned. The second password is stored in buff, which must therefore also be at least size
bytes. A return code of -1 indicates a system error, 1 failure due to use interaction, and 0 is success. All other functions described
here use des_read_pw() to do the work.
des_read_pw_string() is a variant of des_read_pw() that provides a buffer for you if verify is set.
des_read_password() calls des_read_pw() and converts the password to a DES key by calling DES_string_to_key(); des_read_2password()
operates in the same way as des_read_password() except that it generates two keys by using the DES_string_to_2key() function.
NOTES
des_read_pw_string() is available in the MIT Kerberos library as well, and is also available under the name EVP_read_pw_string().
SEE ALSO
ui(3), ui_create(3)
AUTHOR
Richard Levitte (richard@levitte.org) for the OpenSSL project (http://www.openssl.org).
50 2013-03-05 ui_compat(3)