open_flags.c

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// SPDX-License-Identifier: GPL-2.0
#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)
{
    int printed = 0;

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