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