08-22-2013
I concur with blackrageous: the problem is described very vaguely. So the following is just a wild guess. If your session is configured to log you out after some time of inactivity and your running job somehow doesn't count towards activity you might face this problem.
Solutions could in this case include: switch off the automatic logout, either by setting off the TMOUT-value in your login shell or whatever you used to achieve the automatic logout. Or make your job counting towards the activity. Maybe it is started with nohup, so that it disconnects from the process tree of your login shell or something such.
Sorry to be so vague, but from a vague description you can't expect detailed answers.
I hope this helps.
bakunin
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LOGIN(3) BSD Library Functions Manual LOGIN(3)
NAME
login, logout, logwtmp -- login utility functions (DEPRECATED)
SYNOPSIS
#include <util.h>
void
login(struct utmp *ut);
int
logout(const char *line);
void
logwtmp(const char *line, const char *name, const char *host);
DESCRIPTION
The login(), logout(), and logwtmp() functions are DEPRECATED; use pututxline(3) instead.
These functions operate on the database of current users in /var/run/utmpx and the system log file. Superuser permission is required.
The login() function updates the /var/run/utmpx files with user information contained in ut (after converting to a struct utmpx, as described
in pututxline(3)).
The logout() function removes the entry from /var/run/utmpx corresponding to the device line.
The logwtmp() function adds an entry to the system log file. Since login() will add the appropriate entry during a login, logwtmp() is usu-
ally used for logouts.
RETURN VALUES
logout() returns non-zero if it was able to find and delete an entry for line, and zero if there is no entry for line in /var/run/utmpx.
However, there is no error indication due to lack of permissions.
FILES
/dev/*
/var/run/utmpx
SEE ALSO
pututxline(3), utmp(5), utmpx(5)
BSD
December 14, 1995 BSD