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misc: Convert daemon () to GNU coding style

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This is nicer, and is going to be required for the following changes
to reasonably stay within the 79 column limit.

No functional change.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
Message-Id: <20230419160207.65988-2-bugaevc@gmail.com>
This commit is contained in:
Sergey Bugaev 2023-04-19 19:02:01 +03:00 committed by Samuel Thibault
parent 0aa5b28a50
commit 28a441cc57
1 changed files with 49 additions and 39 deletions
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88
misc/daemon.c
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@ -43,50 +43,60 @@ static char sccsid[] = "@(#)daemon.c 8.1 (Berkeley) 6/4/93";
int
daemon (int nochdir, int noclose)
{
int fd;
int fd;
switch (__fork()) {
case -1:
return (-1);
case 0:
break;
default:
_exit(0);
}
switch (__fork ())
{
case -1:
return -1;
if (__setsid() == -1)
return (-1);
case 0:
break;
if (!nochdir)
(void)__chdir("/");
default:
_exit (0);
}
if (!noclose) {
struct __stat64_t64 st;
if (__setsid () == -1)
return -1;
if ((fd = __open_nocancel(_PATH_DEVNULL, O_RDWR, 0)) != -1
&& __glibc_likely (__fstat64_time64 (fd, &st) == 0)) {
if (__builtin_expect (S_ISCHR (st.st_mode), 1) != 0
if (!nochdir)
(void) __chdir ("/");
if (!noclose)
{
struct __stat64_t64 st;
fd = __open_nocancel (_PATH_DEVNULL, O_RDWR, 0);
if (fd != -1 && __glibc_likely (__fstat64_time64 (fd, &st) == 0))
{
if (__builtin_expect (S_ISCHR (st.st_mode), 1) != 0
#if defined DEV_NULL_MAJOR && defined DEV_NULL_MINOR
&& (st.st_rdev
== makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR))
&& (st.st_rdev == makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR))
#endif
) {
(void)__dup2(fd, STDIN_FILENO);
(void)__dup2(fd, STDOUT_FILENO);
(void)__dup2(fd, STDERR_FILENO);
if (fd > 2)
(void)__close (fd);
} else {
/* We must set an errno value since no
function call actually failed. */
__close_nocancel_nostatus (fd);
__set_errno (ENODEV);
return -1;
}
} else {
__close_nocancel_nostatus (fd);
return -1;
}
}
return (0);
)
{
(void) __dup2 (fd, STDIN_FILENO);
(void) __dup2 (fd, STDOUT_FILENO);
(void) __dup2 (fd, STDERR_FILENO);
if (fd > 2)
(void) __close (fd);
}
else
{
/* We must set an errno value since no function call
actually failed. */
__close_nocancel_nostatus (fd);
__set_errno (ENODEV);
return -1;
}
}
else
{
__close_nocancel_nostatus (fd);
return -1;
}
}
return 0;
}