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);
(), link with -lutil
() appends the utmp structure ut
to the wtmp file.
() constructs a utmp structure using line
, current time and current process ID. Then it calls
() 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 ()
||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
), glibc provides (since version 2.1):
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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