getuid(2) [opendarwin man page]
GETUID(2) BSD System Calls Manual GETUID(2) NAME
getuid, geteuid -- get user identification SYNOPSIS
#include <sys/types.h> #include <unistd.h> uid_t getuid(void); uid_t geteuid(void); DESCRIPTION
The getuid() function returns the real user ID of the calling process. The geteuid() function 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 execution of ``set-user-ID'' mode processes, getuid() is used to determine the real-user-id of the calling process. ERRORS
The getuid() and geteuid() functions are always successful, and no return value is reserved to indicate an error. SEE ALSO
getgid(2), setreuid(2) STANDARDS
Geteuid() and getuid() functions conform to IEEE Std 1003.1-1988 (``POSIX.1''). 4th Berkeley Distribution June 4, 1993 4th Berkeley Distribution
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GETUID(2) BSD System Calls Manual GETUID(2) NAME
getuid, geteuid -- get user identification LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <unistd.h> #include <sys/types.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 execution 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 return 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() and geteuid() functions appeared in Version 7 AT&T UNIX. BSD
June 4, 1993 BSD