/*
* pidfile_write: Write the given pid to the pidfile
*
* @pid: the PID to write
*
* Returns 0 on success, -1 on failure.
*/
int pidfile_write(pid_t pid)
{
FILE *f;
if (g_pidfile) {
f = fopen(g_pidfile, "w+");
} else if (pidfilefd >= 0) {
f = fdopen(pidfilefd, "w");
if (f) {
g_pidfile = fd_to_filename(pidfilefd);
if (!g_pidfile)
goto error;
}
} else {
return 0;
}
if (!f) {
logprintf(STDERR_FILENO, "Could not open pidfile %s : %s\n",
g_pidfile, strerror(errno));
goto error;
}
if (fprintf(f, "%d", pid) < 0) {
logprintf(STDERR_FILENO, "Could not write to pidfile : %s\n",
strerror(errno));
goto error;
}
fclose(f);
return 0;
error:
if (f)
fclose(f);
return -1;
}
FILE *
freopen64 (const char *filename, const char *mode, FILE *fp)
{
FILE *result;
CHECK_FILE (fp, NULL);
if (!(fp->_flags & _IO_IS_FILEBUF))
return NULL;
_IO_acquire_lock (fp);
int fd = _IO_fileno (fp);
const char *gfilename = (filename == NULL && fd >= 0
? fd_to_filename (fd) : filename);
fp->_flags2 |= _IO_FLAGS2_NOCLOSE;
_IO_file_close_it (fp);
_IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps;
if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL)
fp->_wide_data->_wide_vtable = &_IO_wfile_jumps;
result = _IO_file_fopen (fp, gfilename, mode, 0);
fp->_flags2 &= ~_IO_FLAGS2_NOCLOSE;
if (result != NULL)
result = __fopen_maybe_mmap (result);
if (result != NULL)
{
/* unbound stream orientation */
result->_mode = 0;
if (fd != -1)
{
#ifdef O_CLOEXEC
# ifndef __ASSUME_DUP3
int newfd;
if (__have_dup3 < 0)
newfd = -1;
else
newfd =
# endif
__dup3 (_IO_fileno (result), fd,
(result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0
? O_CLOEXEC : 0);
#else
# define newfd 1
#endif
#ifndef __ASSUME_DUP3
if (newfd < 0)
{
if (errno == ENOSYS)
__have_dup3 = -1;
__dup2 (_IO_fileno (result), fd);
if ((result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0)
__fcntl (fd, F_SETFD, FD_CLOEXEC);
}
#endif
__close (_IO_fileno (result));
_IO_fileno (result) = fd;
}
}
else if (fd != -1)
__close (fd);
if (filename == NULL)
free ((char *) gfilename);
_IO_release_lock (fp);
return result;
}
FILE *
freopen (const char *filename, const char *mode, FILE *fp)
{
FILE *result;
CHECK_FILE (fp, NULL);
if (!(fp->_flags & _IO_IS_FILEBUF))
return NULL;
_IO_acquire_lock (fp);
int fd = _IO_fileno (fp);
const char *gfilename = (filename == NULL && fd >= 0
? fd_to_filename (fd) : filename);
fp->_flags2 |= _IO_FLAGS2_NOCLOSE;
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1)
if (&_IO_stdin_used == NULL)
{
/* If the shared C library is used by the application binary which
was linked against the older version of libio, we just use the
older one even for internal use to avoid trouble since a pointer
to the old libio may be passed into shared C library and wind
up here. */
_IO_old_file_close_it (fp);
_IO_JUMPS_FILE_plus (fp) = &_IO_old_file_jumps;
result = _IO_old_file_fopen (fp, gfilename, mode);
}
else
#endif
{
_IO_file_close_it (fp);
_IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps;
if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL)
fp->_wide_data->_wide_vtable = &_IO_wfile_jumps;
result = _IO_file_fopen (fp, gfilename, mode, 1);
if (result != NULL)
result = __fopen_maybe_mmap (result);
}
fp->_flags2 &= ~_IO_FLAGS2_NOCLOSE;
if (result != NULL)
{
/* unbound stream orientation */
result->_mode = 0;
if (fd != -1)
{
#ifdef O_CLOEXEC
# ifndef __ASSUME_DUP3
int newfd;
if (__have_dup3 < 0)
newfd = -1;
else
newfd =
# endif
__dup3 (_IO_fileno (result), fd,
(result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0
? O_CLOEXEC : 0);
#else
# define newfd 1
#endif
#ifndef __ASSUME_DUP3
if (newfd < 0)
{
if (errno == ENOSYS)
__have_dup3 = -1;
__dup2 (_IO_fileno (result), fd);
if ((result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0)
__fcntl (fd, F_SETFD, FD_CLOEXEC);
}
#endif
__close (_IO_fileno (result));
_IO_fileno (result) = fd;
}
}
else if (fd != -1)
__close (fd);
if (filename == NULL)
free ((char *) gfilename);
_IO_release_lock (fp);
return result;
}
FILE *
freopen64 (const char *filename, const char *mode, FILE *fp)
{
FILE *result = NULL;
char fdfilename[FD_TO_FILENAME_SIZE];
CHECK_FILE (fp, NULL);
_IO_acquire_lock (fp);
/* First flush the stream (failure should be ignored). */
_IO_SYNC (fp);
if (!(fp->_flags & _IO_IS_FILEBUF))
goto end;
int fd = _IO_fileno (fp);
const char *gfilename
= filename != NULL ? filename : fd_to_filename (fd, fdfilename);
fp->_flags2 |= _IO_FLAGS2_NOCLOSE;
_IO_file_close_it (fp);
_IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps;
if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL)
fp->_wide_data->_wide_vtable = &_IO_wfile_jumps;
result = _IO_file_fopen (fp, gfilename, mode, 0);
fp->_flags2 &= ~_IO_FLAGS2_NOCLOSE;
if (result != NULL)
result = __fopen_maybe_mmap (result);
if (result != NULL)
{
/* unbound stream orientation */
result->_mode = 0;
if (fd != -1 && _IO_fileno (result) != fd)
{
/* At this point we have both file descriptors already allocated,
so __dup3 will not fail with EBADF, EINVAL, or EMFILE. But
we still need to check for EINVAL and, due Linux internal
implementation, EBUSY. It is because on how it internally opens
the file by splitting the buffer allocation operation and VFS
opening (a dup operation may run when a file is still pending
'install' on VFS). */
if (__dup3 (_IO_fileno (result), fd,
(result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0
? O_CLOEXEC : 0) == -1)
{
_IO_file_close_it (result);
result = NULL;
goto end;
}
__close (_IO_fileno (result));
_IO_fileno (result) = fd;
}
}
else if (fd != -1)
__close (fd);
end:
_IO_release_lock (fp);
return result;
}