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Shell Programming and Scripting
Swapping or switching 2 lines using sed
Post 302248336 by LaTortuga on Friday 17th of October 2008 10:28:30 AM
10-17-2008
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.
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LEARN ABOUT MOJAVE
login
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