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getuid.0
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1992-08-10
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GETUID(2) UNIX Programmer's Manual GETUID(2)
NNAAMMEE
ggeettuuiidd, ggeetteeuuiidd - get user identification
SSYYNNOOPPSSIISS
##iinncclluuddee <<uunniissttdd..hh>>
##iinncclluuddee <<ssyyss//ttyyppeess..hh>>
_u_i_d___t
ggeettuuiidd(_v_o_i_d)
_u_i_d___t
ggeetteeuuiidd(_v_o_i_d)
DDEESSCCRRIIPPTTIIOONN
The ggeettuuiidd() function returns the real user ID of the calling process.
The ggeetteeuuiidd() function returns the effective user ID of the calling pro
cess.
The real user ID is that of the user who has invoked the program. As the
effective user ID gives the process additional permissions during execu
tion of ``_s_e_t__u_s_e_r__I_D'' mode processes, ggeettuuiidd() is used to determine the
realuserid of the calling process.
EERRRROORRSS
The ggeettuuiidd() and ggeetteeuuiidd() functions are always successful, and no return
value is reserved to indicate an error.
SSEEEE AALLSSOO
getgid(2), setreuid(2)
SSTTAANNDDAARRDDSS
GGeetteeuuiidd() and ggeettuuiidd() conform to IEEE Std 1003.11988 (``POSIX'').
4th Berkeley Distribution March 10, 1991 1