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GETUID(2) FreeBSD System Calls Manual GETUID(2) NAME getuid, geteuid -- get user identification LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <unistd.h> uid_t getuid(void); uid_t geteuid(void); DESCRIPTION The getuid() system call returns the real user ID of the calling process. The geteuid() system call returns the effective user ID of the calling process. 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 "set-user-ID" mode processes, getuid() is used to determine the real-user-id of the calling process. ERRORS The getuid() and geteuid() system calls are always successful, and no re- turn value is reserved to indicate an error. SEE ALSO getgid(2), issetugid(2), setgid(2), setreuid(2), setuid(2) STANDARDS The geteuid() and getuid() system calls are expected to conform to ISO/IEC 9945-1:1990 ("POSIX.1"). HISTORY The getuid() function appeared in Version 1 AT&T UNIX. The geteuid() function appeared in Version 4 AT&T UNIX. FreeBSD 13.0 December 1, 2017 FreeBSD 13.0
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | ERRORS | SEE ALSO | STANDARDS | HISTORY
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