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ffix
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Michael Kerrisk
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man2/stat.2
59
man2/stat.2
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@ -187,33 +187,34 @@ The following POSIX macros are defined to check the file type using the
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field:
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.RS
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.TP 1.2i
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S_ISREG(m)
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.BR S_ISREG (m)
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is it a regular file?
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.TP
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S_ISDIR(m)
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.BR S_ISDIR (m)
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directory?
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.TP
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S_ISCHR(m)
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.BR S_ISCHR (m)
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character device?
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.TP
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S_ISBLK(m)
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.BR S_ISBLK (m)
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block device?
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.TP
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S_ISFIFO(m)
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.BR S_ISFIFO (m)
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FIFO (named pipe)?
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.TP
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S_ISLNK(m)
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.BR S_ISLNK (m)
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symbolic link? (Not in POSIX.1-1996.)
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.TP
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S_ISSOCK(m)
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.BR S_ISSOCK (m)
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socket? (Not in POSIX.1-1996.)
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.RE
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.PP
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The following flags are defined for the
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.I st_mode
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field:
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.RS
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.TS
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l l l.
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lB l l.
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S_IFMT 0170000 bitmask for the file type bitfields
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S_IFSOCK 0140000 socket
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S_IFLNK 0120000 symbolic link
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@ -238,6 +239,7 @@ S_IROTH 00004 others have read permission
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S_IWOTH 00002 others have write permission
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S_IXOTH 00001 others have execute permission
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.TE
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.RE
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.P
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The set-group-ID bit
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.RB ( S_ISGID )
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@ -316,19 +318,37 @@ fields may be less portable.
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The interpretation differs between systems,
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and possibly on a single system when NFS mounts are involved.)
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.LP
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POSIX does not describe the S_IFMT, S_IFSOCK, S_IFLNK, S_IFREG, S_IFBLK,
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S_IFDIR, S_IFCHR, S_IFIFO, S_ISVTX bits, but instead demands the use of
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the macros S_ISDIR(), etc.
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POSIX does not describe the
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.BR S_IFMT ,
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.BR S_IFSOCK ,
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.BR S_IFLNK ,
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.BR S_IFREG ,
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.BR S_IFBLK ,
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.BR S_IFDIR ,
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.BR S_IFCHR ,
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.BR S_IFIFO ,
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.BR S_ISVTX
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bits, but instead demands the use of
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the macros
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.BR S_ISDIR (),
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etc.
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The
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S_ISLNK()
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.BR S_ISLNK ()
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and
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S_ISSOCK()
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.BR S_ISSOCK ()
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macros are not in
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POSIX.1-1996, but both are present in POSIX.1-2001;
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the former is from SVID 4, the latter from SUSv2.
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.LP
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Unix V7 (and later systems) had S_IREAD, S_IWRITE, S_IEXEC, where POSIX
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prescribes the synonyms S_IRUSR, S_IWUSR, S_IXUSR.
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Unix V7 (and later systems) had
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.BR S_IREAD ,
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.BR S_IWRITE ,
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.BR S_IEXEC ,
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where POSIX
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prescribes the synonyms
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.BR S_IRUSR ,
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.BR S_IWUSR ,
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.BR S_IXUSR .
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.SS "Other Systems"
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Values that have been (or are) in use on various systems:
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.TS
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@ -336,13 +356,14 @@ l l l l l.
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hex name ls octal description
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f000 S_IFMT 170000 mask for file type
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0000 000000 SCO out-of-service inode, BSD unknown type
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SVID-v2 and XPG2 have both 0 and 0100000 for ordinary file
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SVID-v2 and XPG2 have both 0 and 0100000
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for ordinary file
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1000 S_IFIFO p| 010000 FIFO (named pipe)
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2000 S_IFCHR c 020000 character special (V7)
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3000 S_IFMPC 030000 multiplexed character special (V7)
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4000 S_IFDIR d/ 040000 directory (V7)
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5000 S_IFNAM 050000 XENIX named special file
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with two subtypes, distinguished by st_rdev values 1, 2:
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with two subtypes, distinguished by \fIst_rdev\fP values 1, 2
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0001 S_INSEM s 000001 XENIX semaphore subtype of IFNAM
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0002 S_INSHD m 000002 XENIX shared data subtype of IFNAM
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6000 S_IFBLK b 060000 block special (V7)
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@ -355,13 +376,13 @@ b000 S_IFSHAD 130000 Solaris shadow inode for ACL (not seen by userspace)
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c000 S_IFSOCK s= 140000 socket (BSD; also "S_IFSOC" on VxFS)
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d000 S_IFDOOR D> 150000 Solaris door
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e000 S_IFWHT w% 160000 BSD whiteout (not used for inode)
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0200 S_ISVTX 001000 `sticky bit': save swapped text even after use (V7)
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reserved (SVID-v2)
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On non-directories: don't cache this file (SunOS)
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On directories: restricted deletion flag (SVID-v4.2)
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0400 S_ISGID 002000 set-group-ID on execution (V7)
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for directories: use BSD semantics for propagation of GID
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for directories: use BSD semantics for
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propagation of GID
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0400 S_ENFMT 002000 SysV file locking enforcement (shared with S_ISGID)
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0800 S_ISUID 004000 set-user-ID on execution (V7)
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0800 S_CDF 004000 directory is a context dependent file (HP-UX)
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@ -45,9 +45,9 @@ cfmakeraw, cfgetospeed, cfgetispeed, cfsetispeed, cfsetospeed, cfsetspeed \-
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get and set terminal attributes, line control, get and set baud rate
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.SH SYNOPSIS
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.nf
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#include <termios.h>
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.B #include <termios.h>
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.br
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#include <unistd.h>
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.B #include <unistd.h>
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.sp
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.BI "int tcgetattr(int " fd ", struct termios *" termios_p );
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.sp
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@ -368,7 +368,8 @@ characters are converted to uppercase.
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.\" [requires _BSD_SOURCE or _SVID_SOURCE or _XOPEN_SOURCE]
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.\" glibc is probably now wrong to allow
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.B _XOPEN_SOURCE
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to expose XCASE.
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to expose
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.BR XCASE .
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.TP
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.B ECHO
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Echo input characters.
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