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getuid(3f) [bsd man page]

GETUID(3F)																GETUID(3F)

getuid, getgid - get user or group ID of the caller SYNOPSIS
integer function getuid() integer function getgid() DESCRIPTION
These functions return the real user or group ID of the user of the process. FILES
/usr/lib/libU77.a SEE ALSO
getuid(2) 4.2 Berkeley Distribution May 15, 1985 GETUID(3F)

Check Out this Related Man Page

GETUID(2)						     Linux Programmer's Manual							 GETUID(2)

getuid, geteuid - get user identity SYNOPSIS
#include <unistd.h> #include <sys/types.h> uid_t getuid(void); uid_t geteuid(void); DESCRIPTION
getuid() returns the real user ID of the calling process. geteuid() returns the effective user ID of the calling process. ERRORS
These functions are always successful. CONFORMING TO
POSIX.1-2001, 4.3BSD. NOTES
History In UNIX V6 the getuid() call returned (euid << 8) + uid. UNIX V7 introduced separate calls getuid() and geteuid(). The original Linux getuid() and geteuid() system calls supported only 16-bit user IDs. Subsequently, Linux 2.4 added getuid32() and geteuid32(), supporting 32-bit IDs. The glibc getuid() and geteuid() wrapper functions transparently deal with the variations across ker- nel versions. SEE ALSO
getresuid(2), setreuid(2), setuid(2), credentials(7) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at Linux 2010-11-22 GETUID(2)

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