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 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 …

Finds the real user ID (UID) of the calling process. getuid () returns the found value. It is always successful. There are no documented errno values.

geteuid () returns the effective user ID of the current process. These functions are always successful. POSIX.1-2001, 4.3BSD. In Unix V6 the getuid () call returned (euid << 8) + uid. Unix V7 introduced separate calls getuid () and geteuid ().

getuid — get a real user ID SYNOPSIS top #include <unistd.h> uid_t getuid(void); DESCRIPTION top The getuid() function shall return the real user ID of the calling process. The getuid() function shall not modify errno. RETURN VALUE top

getuid - get a real user ID SYNOPSIS. #include <unistd.h> uid_t getuid(void); DESCRIPTION. The getuid() function shall return the real user ID of the calling process. RETURN VALUE. The getuid() function shall always be successful and no return value is reserved to indicate the error. ERRORS. No errors are defined.

The effective user ID gives the process various permissions during execution of “set-user-ID” mode processes which use getuid() to determine the real user ID of the process that invoked them. The getgid() function returns the real group ID of the calling process.

geteuid() returns the effective user ID of the calling process. These functions are always successful. POSIX.1-2001, POSIX.1-2008, 4.3BSD. History. In UNIX V6 the getuid() call returned (euid << 8) + uid. UNIX V7 in- troduced separate calls getuid() and geteuid(). The original Linux getuid() and geteuid() system calls supported only.

geteuid () returns the effective user ID of the calling process. These functions are always successful. POSIX.1-2001, POSIX.1-2008, 4.3BSD. In UNIX V6 the getuid () call returned (euid << 8) + uid. UNIX V7 introduced separate calls getuid () and. geteuid ().

geteuid () returns the effective user ID of the calling process. These functions are always successful and never modify errno. POSIX.1-2008. POSIX.1-2001, 4.3BSD. In UNIX V6 the getuid () call returned (euid << 8) + uid. UNIX V7 introduced separate …