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- SETREUID(3) UNIX Programmer's Manual SETREUID(3)
-
- NNAAMMEE
- sseettrreeuuiidd - set real and effective user ID's
-
- SSYYNNOOPPSSIISS
- ##iinncclluuddee <<uunniissttdd..hh>>
-
- _i_n_t
- sseettrreeuuiidd(_i_n_t _r_u_i_d, _i_n_t _e_u_i_d)
-
- DDEESSCCRRIIPPTTIIOONN
- The real and effective user ID's of the current process are set according
- to the arguments. If _r_u_i_d or _e_u_i_d is -1, the current uid is filled in by
- the system. Unprivileged users may change the real user ID to the effec-
- tive user ID and vice-versa; only the super-user may make other changes.
-
- The sseettrreeuuiidd() function has been used to swap the real and effective user
- IDs in set-user-ID programs to temporarily relinquish the set-user-ID
- value. This purpose is now better served by the use of the sseetteeuuiidd()
- function (see setuid(2)).
-
- When setting the real and effective user IDs to the same value, the stan-
- dard sseettuuiidd() function is preferred.
-
- RREETTUURRNN VVAALLUUEESS
- Upon successful completion, a value of 0 is returned. Otherwise, a value
- of -1 is returned and _e_r_r_n_o is set to indicate the error.
-
- EERRRROORRSS
- [EPERM] The current process is not the super-user and a change oth-
- er than changing the effective user-id to the real user-id
- was specified.
-
- SSEEEE AALLSSOO
- getuid(2), seteuid(2), setuid(2)
-
- HHIISSTTOORRYY
- The sseettrreeuuiidd() function call appeared in 4.2BSD and was dropped in
- 4.4BSD.
-
- 4th Berkeley Distribution March 10, 1991 1
-