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Annotation of researchv10dc/man/adm/man2/getuid.2, revision 1.1

1.1     ! root        1: .TH GETUID 2
        !             2: .CT 2 proc_man secur
        !             3: .SH NAME
        !             4: getuid, getgid, geteuid, getegid, getlogname, getpid, getppid, getpgrp, setuid, setgid, setruid, setlogname, setpgrp \(mi get or set 
        !             5: user, group, or process identity
        !             6: .SH SYNOPSIS
        !             7: .nf
        !             8: .2C
        !             9: .B int getuid()
        !            10: .PP
        !            11: .B int geteuid()
        !            12: .PP
        !            13: .B int getgid()
        !            14: .PP
        !            15: .B int getegid()
        !            16: .PP
        !            17: .B int getlogname(buf)
        !            18: .B char *buf;
        !            19: .PP
        !            20: .B int getpid()
        !            21: .PP
        !            22: .B int getppid()
        !            23: .PP
        !            24: .B int getpgrp(pid)
        !            25: .B int pid;
        !            26: .PP
        !            27: .B int setuid(uid)
        !            28: .PP
        !            29: .B int setgid(gid)
        !            30: .PP
        !            31: .B int setruid(uid)
        !            32: .PP
        !            33: .B int setlogname(buf)
        !            34: .B char buf[8];
        !            35: .PP
        !            36: .B int setpgrp(pid, pgrp)
        !            37: .B int pid, pgrp;
        !            38: .sp 3  \" to balance columns
        !            39: .1C
        !            40: .fi
        !            41: .SH DESCRIPTION
        !            42: .I Getuid
        !            43: returns the real userid of the current process,
        !            44: .I geteuid
        !            45: the effective userid.
        !            46: The real userid identifies the person who is logged in,
        !            47: rather than the effective userid, which
        !            48: determines access permission at the moment.
        !            49: It is thus useful to set-userid programs to find out who invoked them.
        !            50: .PP
        !            51: .I Getgid
        !            52: returns the real groupid,
        !            53: .I getegid
        !            54: the effective groupid.
        !            55: .PP
        !            56: .I Getlogname
        !            57: copies the login name of the current process
        !            58: into the buffer pointed to by
        !            59: .IR buf ,
        !            60: which must be at least eight characters long.
        !            61: .PP
        !            62: .I Getpid
        !            63: returns
        !            64: the process id of
        !            65: the current process,
        !            66: .I getppid
        !            67: that of its parent process.
        !            68: .PP
        !            69: .I Getpgrp
        !            70: returns the process group id of process
        !            71: .IR pid ;
        !            72: 0
        !            73: means the current process.
        !            74: .PP
        !            75: .I Setuid
        !            76: .RI ( setgid )
        !            77: sets the effective and real userid (groupid) of the current process to
        !            78: .I uid
        !            79: .RI ( gid ).
        !            80: Both the effective and the real userid (groupid) are set.
        !            81: These calls are permitted only if the process is super-user
        !            82: or if the argument is the real or effective userid (groupid).
        !            83: .PP
        !            84: .I Setruid
        !            85: sets the real userid only.
        !            86: It may only be used by the super-user.
        !            87: .PP
        !            88: .I Setlogname
        !            89: sets the login name
        !            90: returned by
        !            91: .IR getlogname .
        !            92: It may only be used by the super-user.
        !            93: .PP
        !            94: .I Setpgrp
        !            95: sets the process group id of
        !            96: process
        !            97: .I pid
        !            98: to
        !            99: .IR pgrp .
        !           100: .I Pid
        !           101: 0 is the current process.
        !           102: Any process may change its own process group;
        !           103: only the super-user may change others.
        !           104: .SH "SEE ALSO"
        !           105: .IR getuid (1),
        !           106: .IR getlogin (3)
        !           107: .SH DIAGNOSTICS
        !           108: .IR getlogname :
        !           109: .BR EFAULT
        !           110: .br
        !           111: .IR setlogname :
        !           112: .BR EFAULT ,
        !           113: .B EPERM 
        !           114: .br
        !           115: .IR setuid ,
        !           116: .IR setgid ,
        !           117: .IR setruid ,
        !           118: .IR setpgrp :
        !           119: .B EPERM
        !           120: .SH BUGS
        !           121: Non-super-user processes
        !           122: may also use
        !           123: .I setpgrp
        !           124: to change the process group of their descendants;
        !           125: only certain unsupported shells use this,
        !           126: and the facility may vanish presently.

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