3509c1969a
* 'lsfd-fix-contatns-for-decode-flags' of https://github.com/masatake/util-linux: lsfd: fix wrongly checked flag constants
148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
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* lsfd(1) - list file descriptors
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*
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* Copyright (C) 2022 Red Hat, Inc. All rights reserved.
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* Written by Masatake YAMATO <yamato@redhat.com>
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*
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* Very generally based on lsof(8) by Victor A. Abell <abe@purdue.edu>
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* It supports multiple OSes. lsfd specializes to Linux.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* lsfd_decode_file_flags() is for decoding `flags' field of
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* /proc/$pid/fdinfo/$fd. Bits of the field have name defined
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* in fctl.h.
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* A system on which lsfd is built may have multiple
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* fctl.h files:
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*
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* - /usr/include/asm/fcntl.h (a part of Linux kernel)
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* - /usr/include/asm-generic/fcntl.h (a part of Linux kernel)
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* - /usr/include/fcntl.h (a part of glibc)
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* - /usr/include/bits/fcntl.h (a part of glibc)
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*
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* For decoding purpose, /usr/include/asm/fcntl.h or
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* /usr/include/asm-generic/fcntl.h is needed.
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*
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* /usr/include/bits/fcntl.h and /usr/include/fcntl.h are
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* not suitable for decoding. They should not be included.
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* /usr/include/fcntl.h includes /usr/include/bits/fcntl.h.
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*/
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#if defined HAVE_ASM_FCNTL_H
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#include <asm/fcntl.h>
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#elif defined HAVE_ASM_GENERIC_FCNTL_H
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#include <asm-generic/fcntl.h>
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#else
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#error "kernel's fcntl.h is not available"
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#endif
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#include <stddef.h> /* for size_t */
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struct ul_buffer;
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void lsfd_decode_file_flags(struct ul_buffer *buf, int flags);
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/* We cannot include buffer.h because buffer.h includes
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* /usr/include/fcntl.h indirectly. */
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extern int ul_buffer_is_empty(struct ul_buffer *buf);
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extern int ul_buffer_append_data(struct ul_buffer *buf, const char *data, size_t sz);
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extern int ul_buffer_append_string(struct ul_buffer *buf, const char *str);
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void lsfd_decode_file_flags(struct ul_buffer *buf, int flags)
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{
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#define SET_FLAG_FULL(L,s) \
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do { \
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if (flags & (L)) { \
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if (!ul_buffer_is_empty(buf)) \
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ul_buffer_append_data(buf, ",", 1); \
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ul_buffer_append_string(buf, #s); \
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} \
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} while (0)
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#define SET_FLAG(L,s) SET_FLAG_FULL(O_##L,s)
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#ifdef O_WRONLY
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SET_FLAG(WRONLY,wronly);
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#endif
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#ifdef O_RDWR
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SET_FLAG(RDWR,rdwr);
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#endif
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#ifdef O_CREAT
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SET_FLAG(CREAT,creat);
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#endif
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#ifdef O_EXCL
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SET_FLAG(EXCL,excl);
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#endif
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#ifdef O_NOCTTY
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SET_FLAG(NOCTTY,noctty);
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#endif
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#ifdef O_APPEND
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SET_FLAG(APPEND,append);
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#endif
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#ifdef O_NONBLOCK
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SET_FLAG(NONBLOCK,nonblock);
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#endif
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#ifdef O_DSYNC
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SET_FLAG(DSYNC,dsync);
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#endif
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#ifdef FASYNC
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SET_FLAG_FULL(FASYNC,fasync);
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#endif
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#ifdef O_DIRECT
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SET_FLAG(DIRECT,direct);
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#endif
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#ifdef O_LARGEFILE
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SET_FLAG(LARGEFILE,largefile);
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#endif
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#ifdef O_DIRECTORY
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SET_FLAG(DIRECTORY,directory);
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#endif
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#ifdef O_NOFOLLOW
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SET_FLAG(NOFOLLOW,nofollow);
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#endif
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#ifdef O_NOATIME
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SET_FLAG(NOATIME,noatime);
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#endif
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#ifdef O_CLOEXEC
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SET_FLAG(CLOEXEC,cloexec);
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#endif
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#ifdef __O_SYNC
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SET_FLAG_FULL(__O_SYNC,_sync);
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#endif
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#ifdef O_PATH
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SET_FLAG(PATH,path);
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#endif
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#ifdef __O_TMPFILE
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SET_FLAG_FULL(__O_TMPFILE,_tmpfile);
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#endif
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}
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