tools/perf/trace/beauty/open_flags.c

Source file repositories/reference/linux-study-clean/tools/perf/trace/beauty/open_flags.c

File Facts

System
Linux kernel
Corpus path
tools/perf/trace/beauty/open_flags.c
Extension
.c
Size
1852 bytes
Lines
89
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: LGPL-2.1
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifndef O_DIRECT
#define O_DIRECT	00040000
#endif

#ifndef O_DIRECTORY
#define O_DIRECTORY	00200000
#endif

#ifndef O_NOATIME
#define O_NOATIME	01000000
#endif

#ifndef O_TMPFILE
#define O_TMPFILE	020000000
#endif

#undef O_LARGEFILE
#define O_LARGEFILE	00100000

size_t open__scnprintf_flags(unsigned long flags, char *bf, size_t size, bool show_prefix)
{
	const char *prefix = "O_";
	int printed = 0;

	if ((flags & O_ACCMODE) == O_RDONLY)
		printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", "RDONLY");
	if (flags == 0)
		return printed;
#define	P_FLAG(n) \
	if (flags & O_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
		flags &= ~O_##n; \
	}

	P_FLAG(RDWR);
	P_FLAG(APPEND);
	P_FLAG(ASYNC);
	P_FLAG(CLOEXEC);
	P_FLAG(CREAT);
	P_FLAG(DIRECT);
	P_FLAG(DIRECTORY);
	P_FLAG(EXCL);
	P_FLAG(LARGEFILE);
	P_FLAG(NOFOLLOW);
	P_FLAG(TMPFILE);
	P_FLAG(NOATIME);
	P_FLAG(NOCTTY);
#ifdef O_NONBLOCK
	P_FLAG(NONBLOCK);
#elif O_NDELAY
	P_FLAG(NDELAY);
#endif
#ifdef O_PATH
	P_FLAG(PATH);
#endif
#ifdef O_DSYNC
	if ((flags & O_SYNC) == O_SYNC)
		printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", "SYNC");
	else {
		P_FLAG(DSYNC);
	}
#else
	P_FLAG(SYNC);
#endif
	P_FLAG(TRUNC);
	P_FLAG(WRONLY);
#undef P_FLAG

	if (flags)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);

	return printed;
}

size_t syscall_arg__scnprintf_open_flags(char *bf, size_t size, struct syscall_arg *arg)
{
	int flags = arg->val;

	if (!(flags & O_CREAT))
		arg->mask |= 1 << (arg->idx + 1); /* Mask the mode parm */

	return open__scnprintf_flags(flags, bf, size, arg->show_string_prefix);
}

Annotation

Implementation Notes