Mikhail V wrote:
Did you see much code written with hex literals?
From /usr/include/sys/fcntl.h: /* * File status flags: these are used by open(2), fcntl(2). * They are also used (indirectly) in the kernel file structure f_flags, * which is a superset of the open/fcntl flags. Open flags and f_flags * are inter-convertible using OFLAGS(fflags) and FFLAGS(oflags). * Open/fcntl flags begin with O_; kernel-internal flags begin with F. */ /* open-only flags */ #define O_RDONLY 0x0000 /* open for reading only */ #define O_WRONLY 0x0001 /* open for writing only */ #define O_RDWR 0x0002 /* open for reading and writing */ #define O_ACCMODE 0x0003 /* mask for above modes */ /* * Kernel encoding of open mode; separate read and write bits that are * independently testable: 1 greater than the above. * * XXX * FREAD and FWRITE are excluded from the #ifdef KERNEL so that TIOCFLUSH, * which was documented to use FREAD/FWRITE, continues to work. */ #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) #define FREAD 0x0001 #define FWRITE 0x0002 #endif #define O_NONBLOCK 0x0004 /* no delay */ #define O_APPEND 0x0008 /* set append mode */ #ifndef O_SYNC /* allow simultaneous inclusion of <aio.h> */ #define O_SYNC 0x0080 /* synch I/O file integrity */ #endif #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) #define O_SHLOCK 0x0010 /* open with shared file lock */ #define O_EXLOCK 0x0020 /* open with exclusive file lock */ #define O_ASYNC 0x0040 /* signal pgrp when data ready */ #define O_FSYNC O_SYNC /* source compatibility: do not use */ #define O_NOFOLLOW 0x0100 /* don't follow symlinks */ #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */ #define O_CREAT 0x0200 /* create if nonexistant */ #define O_TRUNC 0x0400 /* truncate to zero length */ #define O_EXCL 0x0800 /* error if already exists */ #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) #define O_EVTONLY 0x8000 /* descriptor requested for event notifications only */ #endif #define O_NOCTTY 0x20000 /* don't assign controlling terminal */ #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) #define O_DIRECTORY 0x100000 #define O_SYMLINK 0x200000 /* allow open of a symlink */ #endif #ifndef O_DSYNC /* allow simultaneous inclusion of <aio.h> */ #define O_DSYNC 0x400000 /* synch I/O data integrity */ #endif -- Greg _______________________________________________ Python-ideas mailing list Python-ideas@python.org https://mail.python.org/mailman/listinfo/python-ideas Code of Conduct: http://python.org/psf/codeofconduct/
