user_from_uid() -- get user name associated with user ID

SYNOPSIS

#include <pwd.h>

char *user_from_uid(uid_t uid, int nouser);

The user_from_uid() function returns the user name associated with the argument uid. The user name is cached so that multiple calls with the same uid do not require additional calls to getpwuid(). If there is no user associated with the uid, a pointer is returned to an ASCII representation of the uid, unless the argument nouser is non-zero, in which case a NULL pointer is returned.

PARAMETERS

uid: Is the user ID for which the user name is to be obtained.
nouser: Indicates what to do in case uid does not correspond to a user name.