I thought the same but in my case, all user s are LDAP and not maintained locally. So how system determines that this user has been deleted and let represent the userid as number. And for your information, still many user directories/files are showing properly with userid/owner name in its properties.
Thanks a lot for your time! Please advise.
It's abstracted behind the getpwent() call and its related calls, looks like:
So ls doesn't reach in and grab login names from /etc/passwd manually, it just calls getpwent() from glibc, which is capable of getting login info from any valid sources. Finding no corresponding UID in either, ls just prints the UID/GID.
Didn't know getpwent() did that. That's a pretty good reason to use these functions instead of just parsing /etc/passwd yourself!
im running into changing the ownership of a file. I am trying to change the ownership to "system", but it doesn't want to work. I
sudo chown system /preferences.plist
Password:
chown: system: Invalid argument
is there a way to read the ownership of a file, something like
read chown... (3 Replies)
Hi Folks,
I know that changing users and groups is pretty basic admin, but this one has got me stumped. When I try to change the group of a file for which I am the owner for, it still gives me a 'Not owner' error.
For example, when I am logged in as 'webadmin', I have the following file:
... (4 Replies)
Hello,
I am on a mission to determine the user of file. I have used the ls -l command but it displays permission, link, user, group, etc, but I just want to display just the name of user of a specified file.
Many thanks (4 Replies)
hi,
how can I get the owner of the file ( not uid) on windows plaform.
"getpwuid" is not working on windows. I knw it works on unix.
Thanks. (2 Replies)
Hi all,
We have some files are under 744 permissions and the the owner is say owner1 and group1.
Now we have another user owner2 of group2, owner2 can remove files of the owner1 and the permission of those files are 744, unix admin told us he did some config at his side so we can do that.
... (14 Replies)
What i did:
- logged in with acc1 and created a new user acc2
commands used: useradd and passwd.
- Then i logged in acc2. but all the files are owned by acc1.
Issue: I try to change the owner of the files using chown command . But it gives me a error message.
All i want to do is... (13 Replies)
i need to do the following operations in solaris 10:
1.change owner and group owner for files which are not owned by the current user and user group
2.to can delete files in the /tmp directory which are not of the current user
3. allow to a standard user the deletion of files in the /tmp... (1 Reply)
hi everyone,
We've generated mpstat.out file monitoring cpu utilization and the file is ready now.Wanted to generate graphical charts for the same output data.
Can anyone pleas suggest tool for the same.? (1 Reply)
Discussion started by: Kathraji
1 Replies
LEARN ABOUT REDHAT
getpwent
GETPWENT(3) Linux Programmer's Manual GETPWENT(3)NAME
getpwent, setpwent, endpwent - get password file entry
SYNOPSIS
#include <pwd.h>
#include <sys/types.h>
struct passwd *getpwent(void);
void setpwent(void);
void endpwent(void);
DESCRIPTION
The getpwent() function returns a pointer to a structure containing the broken out fields of a line from /etc/passwd. The first time it is
called it returns the first entry; thereafter, it returns successive entries.
The setpwent() function rewinds the file pointer to the beginning of the /etc/passwd file.
The endpwent() function closes the /etc/passwd file.
The passwd structure is defined in <pwd.h> as follows:
struct passwd {
char *pw_name; /* user name */
char *pw_passwd; /* user password */
uid_t pw_uid; /* user id */
gid_t pw_gid; /* group id */
char *pw_gecos; /* real name */
char *pw_dir; /* home directory */
char *pw_shell; /* shell program */
};
RETURN VALUE
The getpwent() function returns the passwd structure, or NULL if there are no more entries or an error occurs.
ERRORS
ENOMEM Insufficient memory to allocate passwd structure.
FILES
/etc/passwd
password database file
CONFORMING TO
SVID 3, BSD 4.3
SEE ALSO fgetpwent(3), getpwnam(3), getpwuid(3), getpw(3), putpwent(3), passwd(5)GNU 1996-05-27 GETPWENT(3)