|UPDWTMP(3)||Linux Programmer's Manual||UPDWTMP(3)|
updwtmp, logwtmp - append an entry to the wtmp file
void updwtmp(const char *wtmp_file, const struct utmp *ut); void logwtmp(const char *line, const char *name, const char *host);
For logwtmp(), link with -lutil.
updwtmp() appends the utmp structure ut to the wtmp file.
logwtmp() constructs a utmp structure using line, name, host, current time, and current process ID. Then it calls updwtmp() to append the structure to the wtmp file.
- database of past user logins
For an explanation of the terms used in this section, see attributes(7).
|updwtmp (), logwtmp ()||Thread safety||MT-Unsafe sig:ALRM timer|
Not in POSIX.1. Present on Solaris, NetBSD, and perhaps other systems.
For consistency with the other "utmpx" functions (see getutxent(3)), glibc provides (since version 2.1):
#include <utmpx.h> void updwtmpx (const char *wtmpx_file, const struct utmpx *utx);
This function performs the same task as updwtmp(), but differs in that it takes a utmpx structure as its last argument.
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