I have a question regarding running perl in the current process.
I shall demonstrate with an example.
Look at this.
sh-2.05b$ pwd
/tmp
sh-2.05b$ cat test.sh
#! /bin/sh
cd /etc
sh-2.05b$ ./test.sh
sh-2.05b$ pwd
/tmp
sh-2.05b$ . ./test.sh
sh-2.05b$ pwd
/etc
sh-2.05b$
So... (10 Replies)
I am trying to use a script to replace the header of each file, whose filename are stored within the array $test, using the sed command within a Perl script as follows:
$count = 0;
while ( $count < $#test )
{
`sed -e 's/BIOGRF 321/BIOGRF 332/g' ${test} > 0`;
`cat 0 >... (2 Replies)
so in unix this command works works and shows me a list of directories
find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt
but when i try running a perl script to run this command
my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
How can i print the output of a perl script on a unix console and redirect the same in a log file under same directory simultaneously ?
Like in Shell script, we use tee, is there anything in Perl or any other option ? (2 Replies)
Hi all,
Not sure if this should be in the programming forum, but I believe it will get more response under the Shell Programming and Scripting FORUM.
Am trying to write a customized df script in Perl and need some help with regards to using arrays and file handlers.
At the moment am... (3 Replies)
I am trying to run a perl script which needs input arguments from a parent perl script, but doesn't seem to work. Appreciate your help in this regard.
From parent.pl
$input1=123;
$input2=abc;
I tried calling it with
system("/usr/bin/perl child.pl $input1 $input2");
and
`perl... (1 Reply)
Hi Folks,
I have 2 perl scripts and I need to execute 2nd perl script from the 1st perl script in WINDOWS.
In the 1st perl script that I had, I am calling the 2nd script
main.pl
===========
print "This is my main script\n";
`perl C:\\Users\\sripathg\\Desktop\\scripts\\hi.pl`;
... (3 Replies)
Hi All,
I am aware that html tags can be embedded in cgi script as below.. In the same way is it possible to embed the below javascript in perl cgi script ??
print("<form action="action.htm" method="post" onSubmit="return submitForm(this.Submitbutton)">");
print("<input type = "text"... (1 Reply)
Not sure what I am doing wrong here, but I can print the list with no issue. Just a blank screen with the 'do'.
#!/usr/bin/perl
open FILE, "upslist.txt";
while ($line=<FILE>){
if ($line=~/^(.*?),(.*?)$/){
#print "ups:$1 string:$2\n";
do 'check_snmp_mgeups-0.1.pl -H $1 -C $2';
} ... (1 Reply)
I have reviewed many examples on-line about running another process (either PERL or shell command or a program), but do not find any usefull for my needs way. (Reviewed and not useful the system(), 'back ticks', exec() and open())
I would like to run another PERL-script from first one, not... (1 Reply)
Discussion started by: alex_5161
1 Replies
LEARN ABOUT MINIX
getpwent
GETPWENT(3) Library Functions Manual GETPWENT(3)NAME
getpwent, getpwnam, getpwuid, setpwent, endpwent, setpwfile - password file routines
SYNOPSIS
#include <pwd.h>
struct passwd *getpwent(void)
struct passwd *getpwnam(const char *name)
struct passwd *getpwuid(uid_t uid)
int setpwent(void)
void endpwent(void)
void setpwfile(const char *file)
DESCRIPTION
These functions are used to obtain information from the password file. They return this information in a struct passwd as defined by
<pwd.h>:
struct passwd {
char *pw_name; /* login name */
char *pw_passwd; /* encrypted password */
uid_t pw_uid; /* numeric user id */
gid_t pw_gid; /* numeric group id */
char *pw_gecos; /* user full name and other info */
char *pw_dir; /* user's home directory */
char *pw_shell; /* name of the user's shell */
};
Getpwent() reads the password file entry by entry. Getpwnam() scans the entire password file for the user with the given name. Getpwuid()
looks for the first user with the given uid. The setpwent() and endpwent() functions are used to open and later close the password file.
With setpwfile() one can specify the file to read other than the normal password file. This only sets the name, the next setpwent() call
will open the file. Do not touch the file name while it is active. Use setpwfile(NULL) to revert back to the normal password file.
The usual way to scan the password file is (error checking omitted):
setpwent();
while ((pw = getpwent()) != NULL)
if (appropriate_test(pw)) break;
endpwent();
The pw variable contains the entry that is wanted if non-NULL. The getpwnam() and getpwuid() functions are implemented as in this example,
with error checking of course.
Getpwent() calls setpwent() if this has not yet been done. Setpwent() first calls endpwent() if the password file is still open. (Other
implementations may simply rewind the file.)
FILES
/etc/passwd The password file database.
SEE ALSO cuserid(3), getlogin(3), getgrent(3), passwd(5).
DIAGNOSTICS
Setpwent() has the same return value and error codes as the open(2) call it uses to open the password file. The getxxx() functions return
NULL on end of file, entry not found, or error. You can set errno to zero before the call and check it after.
NOTES
All getxxx() routines return a pointer to static storage that is overwritten in each call.
Only getpwnam() and getpwuid() are defined by POSIX. The _MINIX_SOURCE macro must be defined before including <pwd.h> to make the other
functions visible. The pw_passwd and pw_gecos fields are also not defined by POSIX, but are always visible. Portable code cannot reliably
detect errors by setting errno to zero. Under Minix it is better to make a getpwent() scan if you need to look up several user-id's or
names, but portable code had better use several getpwuid() or getpwnam() calls. The getpwent() is usually available on other systems, but
may be very expensive.
AUTHOR
Kees J. Bot (kjb@cs.vu.nl)
GETPWENT(3)