getuid(2) [ultrix man page]
getuid(2) System Calls Manual getuid(2) Name getuid, geteuid - get user identity Syntax #include <sys/types.h> #include <unistd.h> uid = getuid() uid_t uid; euid = geteuid() uid_t euid; Description The system call returns the real user ID of the current process, the effective user ID. The real user ID identifies the person who is logged in. The effective user ID gives the process additional permissions during execution of "set-user-ID" mode processes, which use to determine the real-user-id of the process which invoked them. Environment System Five Differs from the System V definition in that the return values are of type int, instead of unsigned short. POSIX When your program is compiled in POSIX mode, the and functions return a value of type uid_t. The and functions return a value of type gid_t. See Also getgid(2), setreuid(2) getuid(2)
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getuid(2) System Calls getuid(2) NAME
getuid, geteuid, getgid, getegid - get real user, effective user, real group, and effective group IDs SYNOPSIS
#include <sys/types.h> #include <unistd.h> uid_t getuid(void); uid_t geteuid(void); gid_t getgid(void); gid_t getegid(void); DESCRIPTION
The getuid() function returns the real user ID of the calling process. The real user ID identifies the person who is logged in. The geteuid() function returns the effective user ID of the calling process. The effective user ID gives the process various permissions during execution of "set-user-ID" mode processes which use getuid() to determine the real user ID of the process that invoked them. The getgid() function returns the real group ID of the calling process. The getegid() function returns the effective group ID of the calling process. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO
Intro(2), setuid(2), attributes(5), standards(5) SunOS 5.11 28 Dec 1996 getuid(2)