Hi,
I am reading file records inside a while loop,
and want to update the record when certain condition is met.
How can I update a file while being read?
I want to avoid using temporary files, copy, rename, ...
Hi all,
In a while loop, like below...
while read line
do
read choice
case $choice in
1)
echo "xxx"
esac
done < file
why I can't run the read choice???? (3 Replies)
Hi all
Does anyone have a script that will allow me to stop inside a while read loop.
I want to pause the loop until a enter is pressed.
e.g.
While read line
do
echo something
if LINECOUNT > 40
then
read ENTER?"PRESS ENTER TO CONT..."
... (3 Replies)
Hi guys,
i have a big file with the following format.This includes header(H),detail(D) and trailer(T) information in the file.My problem is i have to search for the character "6h" at 14 th and 15 th position in all the records .if it is there i have to write all those records into a... (1 Reply)
Greeting,
The following script completes after reading only one record from the input file that contains many records. I commented out the "ssh" and get what I expect, an echo of all the records in the input.txt file. Is ssh killing the file handle?
On the box "uname -a" gives "SunOS... (2 Replies)
hi all,
i am experiencing an error which i think an incorrect syntax for the where clause passing a variable was given. under is my code.
sqlplus -s ${USERNAME}/${PASSWORD}@${SID} << END1 >> $LOGFILE
whenever sqlerror exit
set serveroutput on size 1000000
declare
l_rc ... (0 Replies)
I have a loop like
while read i
do
echo "$i"
.
.
.
done < tms.txt
The tms.txt contians data like
2008-02-03 00:00:00
<space>00:00:00
.
.
.
2010-02-03 10:54:32 (2 Replies)
Hello,
I have a set of files Xfile0001 - Xfile0021, and the content of this files (one at a time) needs to be printed between some line (lines start with word "Generated") that I am extracting from another file called file7.txt and all the output goes into output.txt. First I tried creating a for... (5 Replies)
Hi,
This query is a part of a much more lengthy script.
I wish to look for all the files in a folder named "data" which in this case has two files i.e. plan.war and agent.properties. For all the files found under data I wish to ask the user as to where they wish copy the files to.
Below,... (14 Replies)
Discussion started by: mohtashims
14 Replies
LEARN ABOUT OPENDARWIN
pwd_mkdb
PWD_MKDB(8) BSD System Manager's Manual PWD_MKDB(8)NAME
pwd_mkdb -- generate the password databases
SYNOPSIS
pwd_mkdb [-c] [-p | -s] [-d directory] [-u username] file
DESCRIPTION
pwd_mkdb creates db(3) style secure and insecure databases for the specified file. These databases are then installed into /etc/spwd.db and
/etc/pwd.db, respectively. The file is installed into /etc/master.passwd. The file must be in the correct format (see passwd(5)). It is
important to note that the format used in this system is different from the historic Version 7 style format.
The options are as follows:
-c Check if the password file is in the correct format. Do not change, add, or remove any files.
-p Create a Version 7 style password file and install it into /etc/passwd.
-s Only update the secure version of the database. This is most commonly used in conjunction with the -u flag during a password change.
Because the insecure database doesn't contain the password there is no reason to update it if the only change is in the password
field. Cannot be used in conjunction with the -p flag.
-d directory
Operate in a base directory other than the default of /etc. All absolute paths (including file) will be made relative to directory.
Any directories specified as a part of file will be stripped off. This option is used to create password databases in directories
other than etc; for instance in a chroot(8) jail.
-u username
Only update the record for the specified user. Utilities that operate on a single user can use this option to avoid the overhead of
rebuilding the entire database. This option must never be used if the line number of the user's record in /etc/master.passwd has
changed.
file The absolute path to a file in master.passwd format, as described in passwd(5).
The two databases differ in that the secure version contains the user's encrypted password and the insecure version has an asterisk ('*').
The databases are used by the C library password routines (see getpwent(3)).
pwd_mkdb exits zero on success, non-zero on failure.
FILES
/etc/master.passwd current password file
/etc/passwd a Version 7 format password file
/etc/pwd.db insecure password database file
/etc/pwd.db.tmp temporary file
/etc/spwd.db secure password database file
/etc/spwd.db.tmp temporary file
SEE ALSO chpass(1), passwd(1), db(3), getpwent(3), passwd(5), vipw(8)STANDARDS
Previous versions of the system had a program similar to pwd_mkdb, mkpasswd, which built dbm(3) style databases for the password file but
depended on the calling programs to install them. The program was renamed in order that previous users of the program not be surprised by
the changes in functionality.
BUGS
Because of the necessity for atomic update of the password files, pwd_mkdb uses rename(2) to install them. This, however, requires that the
file specified on the command line live on the same file system as the /etc directory.
There are the obvious races with multiple people running pwd_mkdb on different password files at the same time. The front-ends to pwd_mkdb,
chpass(1), passwd(1), and vipw(8) handle the locking necessary to avoid this problem.
BSD June 6, 1993 BSD