Message ID | 20171012035321.22094-5-lukeshu@parabola.nu |
---|---|
State | New |
Headers | show |
Series | Fixup linux ttyname and ttyname_r [BZ #22145] | expand |
On Wed, Oct 11, 2017 at 11:53:20PM -0400, Luke Shumaker wrote: > In the ttyname and ttyname_r routines on Linux, at several points it > it needs to test if a given TTY is the TTY we are looking for. It used to > be that this test was (to see if `maybe` is `mytty`): > > __xstat64(_STAT_VER, maybe_filename, &maybe) == 0 > #ifdef _STATBUF_ST_RDEV > && S_ISCHR(maybe.st_mode) && maybe.st_rdev == mytty.st_rdev > #else > && maybe.st_ino == mytty.st_ino && maybe.st_dev == mytty.st_dev > #endif > > This check appears in several places. > > Then, in commit 15e9a4f3 by Christian Brauner > <christian.brauner@canonical.com>, that check changed to: > > __xstat64(_STAT_VER, maybe_filename, &maybe) == 0 > #ifdef _STATBUF_ST_RDEV > && S_ISCHR(maybe.st_mode) && maybe.st_rdev == mytty.st_rdev > #endif > && maybe.st_ino == mytty.st_ino && maybe.st_dev == mytty.st_dev > > That is, he made st_ino and st_dev checks happen even if we have the > st_rdev member. This is a good change, because kernel namespaces allow you > to create a new namespace, and to create a new device with the same > st_rdev, but isn't the same file. > > However, this check appears twice in each file (ttyname.c and > ttyname_r.c), but Christian only changed it in one place in each file. > Now, that kind-of made sense. The common use-case for this is that > you're in a chroot, and have inherited a file descriptor to a TTY > outside of the chroot. In the ttyname routine, the first check is on > the passed-in file descriptor, while the remaining checks are for > files we open by their absolute path; so we'd expect them to be in the > new namespace. But that's just the "normal" situation, users can do > all kinds of funny things, so update the check everywhere. > > Make it easy to keep consistent by pulling the check in to a static inline > function. > --- > ChangeLog | 5 +++++ > sysdeps/unix/sysv/linux/ttyname.c | 40 ++++++++---------------------------- > sysdeps/unix/sysv/linux/ttyname.h | 12 +++++++++++ > sysdeps/unix/sysv/linux/ttyname_r.c | 41 ++++++++----------------------------- > 4 files changed, 34 insertions(+), 64 deletions(-) > > diff --git a/ChangeLog b/ChangeLog > index 1921f8883b..5973b9d50b 100644 > --- a/ChangeLog > +++ b/ChangeLog > @@ -1,5 +1,10 @@ > 2017-10-11 Luke Shumaker <lukeshu@parabola.nu> > > + [BZ #22145] > + * sysdeps/unix/sysv/linux/ttyname.h (is_mytty): New function. > + * sysdeps/unix/sysv/linux/ttyname.c: Call it. > + * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise. > + > [BZ #22145] > * sysdeps/unix/sysv/linux/tst-ttyname.c: New file. > * sysdeps/unix/sysv/linux/Makefile: Add tst-ttyname to tests. > diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c > index 116cf350e5..138a8a57f8 100644 > --- a/sysdeps/unix/sysv/linux/ttyname.c > +++ b/sysdeps/unix/sysv/linux/ttyname.c > @@ -35,14 +35,14 @@ > char *__ttyname; > #endif > > -static char *getttyname (const char *dev, dev_t mydev, > - ino64_t myino, int save, int *dostat); > +static char *getttyname (const char *dev, struct stat64 *mytty, > + int save, int *dostat); > > libc_freeres_ptr (static char *getttyname_name); > > static char * > attribute_compat_text_section > -getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) > +getttyname (const char *dev, struct stat64 *mytty, int save, int *dostat) > { > static size_t namelen; > struct stat64 st; > @@ -63,7 +63,7 @@ getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) > *((char *) __mempcpy (getttyname_name, dev, devlen - 1)) = '/'; > > while ((d = __readdir64 (dirstream)) != NULL) > - if ((d->d_fileno == myino || *dostat) > + if ((d->d_fileno == mytty->st_ino || *dostat) > && strcmp (d->d_name, "stdin") > && strcmp (d->d_name, "stdout") > && strcmp (d->d_name, "stderr")) > @@ -85,12 +85,7 @@ getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) > } > memcpy (&getttyname_name[devlen], d->d_name, dlen); > if (__xstat64 (_STAT_VER, getttyname_name, &st) == 0 > -#ifdef _STATBUF_ST_RDEV > - && S_ISCHR (st.st_mode) && st.st_rdev == mydev > -#else > - && d->d_fileno == myino && st.st_dev == mydev > -#endif > - ) > + && is_mytty (mytty, &st)) > { > (void) __closedir (dirstream); > #if 0 > @@ -167,12 +162,7 @@ ttyname (int fd) > /* Verify readlink result, fall back on iterating through devices. */ > if (ttyname_buf[0] == '/' > && __xstat64 (_STAT_VER, ttyname_buf, &st1) == 0 > -#ifdef _STATBUF_ST_RDEV > - && S_ISCHR (st1.st_mode) > - && st1.st_rdev == st.st_rdev > -#endif > - && st1.st_ino == st.st_ino > - && st1.st_dev == st.st_dev) > + && is_mytty (&st, &st1)) > return ttyname_buf; > > /* If the link doesn't exist, then it points to a device in another > @@ -186,11 +176,7 @@ ttyname (int fd) > > if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode)) > { > -#ifdef _STATBUF_ST_RDEV > - name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat); > -#else > - name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat); > -#endif > + name = getttyname ("/dev/pts", &st, save, &dostat); > } > else > { > @@ -200,21 +186,13 @@ ttyname (int fd) > > if (!name && dostat != -1) > { > -#ifdef _STATBUF_ST_RDEV > - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); > -#else > - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); > -#endif > + name = getttyname ("/dev", &st, save, &dostat); > } > > if (!name && dostat != -1) > { > dostat = 1; > -#ifdef _STATBUF_ST_RDEV > - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); > -#else > - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); > -#endif > + name = getttyname ("/dev", &st, save, &dostat); > } > > return name; > diff --git a/sysdeps/unix/sysv/linux/ttyname.h b/sysdeps/unix/sysv/linux/ttyname.h > index dd7873d1ff..15f7b066b6 100644 > --- a/sysdeps/unix/sysv/linux/ttyname.h > +++ b/sysdeps/unix/sysv/linux/ttyname.h > @@ -33,3 +33,15 @@ is_pty (struct stat64 *sb) > return false; > #endif > } > + > +static inline int > +is_mytty(struct stat64 *mytty, struct stat64 *maybe) > +{ > + return 1 > +#ifdef _STATBUF_ST_RDEV > + && S_ISCHR (maybe->st_mode) > + && maybe->st_rdev == mytty->st_rdev > +#endif > + && maybe->st_ino == mytty->st_ino > + && maybe->st_dev == mytty->st_dev; > +} I find that hard to read. At first I thought this would unconditionally return 1. I'd rather prefer something like (In the appropriate GNU coding style eventually of course.): static inline bool is_mytty(struct stat64 *mytty, struct stat64 *maybe) { if (maybe->st_ino == mytty->st_ino && maybe->st_dev == mytty->st_dev #ifdef _STATBUF_ST_RDEV && S_ISCHR(maybe->st_mode) && maybe->st_rdev == mytty->st_rdev #endif ) return true; return false; } But others might be fine with it. But I think having it return a bool here is perfectly fine since there's no other possible outcome than true or false. diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c index 18f35ef2b7..d975d95d0d 100644 --- a/sysdeps/unix/sysv/linux/ttyname_r.c +++ b/sysdeps/unix/sysv/linux/ttyname_r.c @@ -31,12 +31,12 @@ #include "ttyname.h" static int getttyname_r (char *buf, size_t buflen, - dev_t mydev, ino64_t myino, int save, + struct stat64 *mytty, int save, int *dostat); static int attribute_compat_text_section -getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, +getttyname_r (char *buf, size_t buflen, struct stat64 *mytty, int save, int *dostat) { struct stat64 st; @@ -52,7 +52,7 @@ getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, } while ((d = __readdir64 (dirstream)) != NULL) - if ((d->d_fileno == myino || *dostat) + if ((d->d_fileno == mytty->st_ino || *dostat) && strcmp (d->d_name, "stdin") && strcmp (d->d_name, "stdout") && strcmp (d->d_name, "stderr")) @@ -72,12 +72,7 @@ getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, cp[0] = '\0'; if (__xstat64 (_STAT_VER, buf, &st) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st.st_mode) && st.st_rdev == mydev -#else - && d->d_fileno == myino && st.st_dev == mydev -#endif - ) + && is_mytty (mytty, &st)) { (void) __closedir (dirstream); __set_errno (save); @@ -151,12 +146,7 @@ __ttyname_r (int fd, char *buf, size_t buflen) /* Verify readlink result, fall back on iterating through devices. */ if (buf[0] == '/' && __xstat64 (_STAT_VER, buf, &st1) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st1.st_mode) - && st1.st_rdev == st.st_rdev -#endif - && st1.st_ino == st.st_ino - && st1.st_dev == st.st_dev) + && is_mytty (&st, &st1)) return 0; /* If the link doesn't exist, then it points to a device in another @@ -175,13 +165,8 @@ __ttyname_r (int fd, char *buf, size_t buflen) if (__xstat64 (_STAT_VER, buf, &st1) == 0 && S_ISDIR (st1.st_mode)) { -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, - &dostat); -#endif } else { @@ -193,26 +178,16 @@ __ttyname_r (int fd, char *buf, size_t buflen) { buf[sizeof ("/dev/") - 1] = '\0'; buflen += sizeof ("pts/") - 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, - &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#endif } if (ret && dostat != -1) { buf[sizeof ("/dev/") - 1] = '\0'; dostat = 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, - save, &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#endif } return ret;
On Thu, 12 Oct 2017 07:16:15 -0400, Christian Brauner wrote: > On Wed, Oct 11, 2017 at 11:53:20PM -0400, Luke Shumaker wrote: > > +static inline int > > +is_mytty(struct stat64 *mytty, struct stat64 *maybe) > > +{ > > + return 1 > > +#ifdef _STATBUF_ST_RDEV > > + && S_ISCHR (maybe->st_mode) > > + && maybe->st_rdev == mytty->st_rdev > > +#endif > > + && maybe->st_ino == mytty->st_ino > > + && maybe->st_dev == mytty->st_dev; > > +} > > I find that hard to read. At first I thought this would unconditionally return > 1. I'd rather prefer something like (In the appropriate GNU coding style > eventually of course.): > > static inline bool is_mytty(struct stat64 *mytty, struct stat64 *maybe) > { > if (maybe->st_ino == mytty->st_ino && maybe->st_dev == mytty->st_dev > #ifdef _STATBUF_ST_RDEV > && S_ISCHR(maybe->st_mode) && maybe->st_rdev == mytty->st_rdev > #endif > ) > return true; > > return false; > } > > But others might be fine with it. I'm fine either way. If the consensus is reformat it, I'll reformat it. > But I think having it return a bool here is > perfectly fine since there's no other possible outcome than true or false. So why doesn't is_pty return a bool? I was mimicing the style already in the file.
On Thu, Oct 12, 2017 at 08:18:50AM -0400, Luke Shumaker wrote: > On Thu, 12 Oct 2017 07:16:15 -0400, > Christian Brauner wrote: > > On Wed, Oct 11, 2017 at 11:53:20PM -0400, Luke Shumaker wrote: > > > +static inline int > > > +is_mytty(struct stat64 *mytty, struct stat64 *maybe) > > > +{ > > > + return 1 > > > +#ifdef _STATBUF_ST_RDEV > > > + && S_ISCHR (maybe->st_mode) > > > + && maybe->st_rdev == mytty->st_rdev > > > +#endif > > > + && maybe->st_ino == mytty->st_ino > > > + && maybe->st_dev == mytty->st_dev; > > > +} > > > > I find that hard to read. At first I thought this would unconditionally return > > 1. I'd rather prefer something like (In the appropriate GNU coding style > > eventually of course.): > > > > static inline bool is_mytty(struct stat64 *mytty, struct stat64 *maybe) > > { > > if (maybe->st_ino == mytty->st_ino && maybe->st_dev == mytty->st_dev > > #ifdef _STATBUF_ST_RDEV > > && S_ISCHR(maybe->st_mode) && maybe->st_rdev == mytty->st_rdev > > #endif > > ) > > return true; > > > > return false; > > } > > > > But others might be fine with it. > > I'm fine either way. If the consensus is reformat it, I'll reformat > it. > > > But I think having it return a bool here is > > perfectly fine since there's no other possible outcome than true or false. > > So why doesn't is_pty return a bool? I was mimicing the style already > in the file. Likely because it was overseen as well. I think it makes more sense to have them return proper bools when they can't return anything else. Seems fine to me since they're used all over the codebase as well. > > -- > Happy hacking, > ~ Luke Shumaker
On Wed, Oct 11, 2017 at 11:53:20PM -0400, Luke Shumaker wrote: [...] > --- a/sysdeps/unix/sysv/linux/ttyname.c > +++ b/sysdeps/unix/sysv/linux/ttyname.c > @@ -35,14 +35,14 @@ > char *__ttyname; > #endif > > -static char *getttyname (const char *dev, dev_t mydev, > - ino64_t myino, int save, int *dostat); > +static char *getttyname (const char *dev, struct stat64 *mytty, > + int save, int *dostat); This has to be "const struct stat64 *". > > libc_freeres_ptr (static char *getttyname_name); > > static char * > attribute_compat_text_section > -getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) > +getttyname (const char *dev, struct stat64 *mytty, int save, int *dostat) Likewise. [...] > --- a/sysdeps/unix/sysv/linux/ttyname.h > +++ b/sysdeps/unix/sysv/linux/ttyname.h > @@ -33,3 +33,15 @@ is_pty (struct stat64 *sb) > return false; > #endif > } > + > +static inline int > +is_mytty(struct stat64 *mytty, struct stat64 *maybe) > +{ Likewise. [...] > diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c > index 18f35ef2b7..d975d95d0d 100644 > --- a/sysdeps/unix/sysv/linux/ttyname_r.c > +++ b/sysdeps/unix/sysv/linux/ttyname_r.c > @@ -31,12 +31,12 @@ > #include "ttyname.h" > > static int getttyname_r (char *buf, size_t buflen, > - dev_t mydev, ino64_t myino, int save, > + struct stat64 *mytty, int save, > int *dostat); Likewise. > > static int > attribute_compat_text_section > -getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, > +getttyname_r (char *buf, size_t buflen, struct stat64 *mytty, > int save, int *dostat) > { Likewise.
diff --git a/ChangeLog b/ChangeLog index 1921f8883b..5973b9d50b 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,10 @@ 2017-10-11 Luke Shumaker <lukeshu@parabola.nu> + [BZ #22145] + * sysdeps/unix/sysv/linux/ttyname.h (is_mytty): New function. + * sysdeps/unix/sysv/linux/ttyname.c: Call it. + * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise. + [BZ #22145] * sysdeps/unix/sysv/linux/tst-ttyname.c: New file. * sysdeps/unix/sysv/linux/Makefile: Add tst-ttyname to tests. diff --git a/sysdeps/unix/sysv/linux/ttyname.c b/sysdeps/unix/sysv/linux/ttyname.c index 116cf350e5..138a8a57f8 100644 --- a/sysdeps/unix/sysv/linux/ttyname.c +++ b/sysdeps/unix/sysv/linux/ttyname.c @@ -35,14 +35,14 @@ char *__ttyname; #endif -static char *getttyname (const char *dev, dev_t mydev, - ino64_t myino, int save, int *dostat); +static char *getttyname (const char *dev, struct stat64 *mytty, + int save, int *dostat); libc_freeres_ptr (static char *getttyname_name); static char * attribute_compat_text_section -getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) +getttyname (const char *dev, struct stat64 *mytty, int save, int *dostat) { static size_t namelen; struct stat64 st; @@ -63,7 +63,7 @@ getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) *((char *) __mempcpy (getttyname_name, dev, devlen - 1)) = '/'; while ((d = __readdir64 (dirstream)) != NULL) - if ((d->d_fileno == myino || *dostat) + if ((d->d_fileno == mytty->st_ino || *dostat) && strcmp (d->d_name, "stdin") && strcmp (d->d_name, "stdout") && strcmp (d->d_name, "stderr")) @@ -85,12 +85,7 @@ getttyname (const char *dev, dev_t mydev, ino64_t myino, int save, int *dostat) } memcpy (&getttyname_name[devlen], d->d_name, dlen); if (__xstat64 (_STAT_VER, getttyname_name, &st) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st.st_mode) && st.st_rdev == mydev -#else - && d->d_fileno == myino && st.st_dev == mydev -#endif - ) + && is_mytty (mytty, &st)) { (void) __closedir (dirstream); #if 0 @@ -167,12 +162,7 @@ ttyname (int fd) /* Verify readlink result, fall back on iterating through devices. */ if (ttyname_buf[0] == '/' && __xstat64 (_STAT_VER, ttyname_buf, &st1) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st1.st_mode) - && st1.st_rdev == st.st_rdev -#endif - && st1.st_ino == st.st_ino - && st1.st_dev == st.st_dev) + && is_mytty (&st, &st1)) return ttyname_buf; /* If the link doesn't exist, then it points to a device in another @@ -186,11 +176,7 @@ ttyname (int fd) if (__xstat64 (_STAT_VER, "/dev/pts", &st1) == 0 && S_ISDIR (st1.st_mode)) { -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev/pts", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev/pts", st.st_dev, st.st_ino, save, &dostat); -#endif + name = getttyname ("/dev/pts", &st, save, &dostat); } else { @@ -200,21 +186,13 @@ ttyname (int fd) if (!name && dostat != -1) { -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); -#endif + name = getttyname ("/dev", &st, save, &dostat); } if (!name && dostat != -1) { dostat = 1; -#ifdef _STATBUF_ST_RDEV - name = getttyname ("/dev", st.st_rdev, st.st_ino, save, &dostat); -#else - name = getttyname ("/dev", st.st_dev, st.st_ino, save, &dostat); -#endif + name = getttyname ("/dev", &st, save, &dostat); } return name; diff --git a/sysdeps/unix/sysv/linux/ttyname.h b/sysdeps/unix/sysv/linux/ttyname.h index dd7873d1ff..15f7b066b6 100644 --- a/sysdeps/unix/sysv/linux/ttyname.h +++ b/sysdeps/unix/sysv/linux/ttyname.h @@ -33,3 +33,15 @@ is_pty (struct stat64 *sb) return false; #endif } + +static inline int +is_mytty(struct stat64 *mytty, struct stat64 *maybe) +{ + return 1 +#ifdef _STATBUF_ST_RDEV + && S_ISCHR (maybe->st_mode) + && maybe->st_rdev == mytty->st_rdev +#endif + && maybe->st_ino == mytty->st_ino + && maybe->st_dev == mytty->st_dev; +} diff --git a/sysdeps/unix/sysv/linux/ttyname_r.c b/sysdeps/unix/sysv/linux/ttyname_r.c index 18f35ef2b7..d975d95d0d 100644 --- a/sysdeps/unix/sysv/linux/ttyname_r.c +++ b/sysdeps/unix/sysv/linux/ttyname_r.c @@ -31,12 +31,12 @@ #include "ttyname.h" static int getttyname_r (char *buf, size_t buflen, - dev_t mydev, ino64_t myino, int save, + struct stat64 *mytty, int save, int *dostat); static int attribute_compat_text_section -getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, +getttyname_r (char *buf, size_t buflen, struct stat64 *mytty, int save, int *dostat) { struct stat64 st; @@ -52,7 +52,7 @@ getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, } while ((d = __readdir64 (dirstream)) != NULL) - if ((d->d_fileno == myino || *dostat) + if ((d->d_fileno == mytty->st_ino || *dostat) && strcmp (d->d_name, "stdin") && strcmp (d->d_name, "stdout") && strcmp (d->d_name, "stderr")) @@ -72,12 +72,7 @@ getttyname_r (char *buf, size_t buflen, dev_t mydev, ino64_t myino, cp[0] = '\0'; if (__xstat64 (_STAT_VER, buf, &st) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st.st_mode) && st.st_rdev == mydev -#else - && d->d_fileno == myino && st.st_dev == mydev -#endif - ) + && is_mytty (mytty, &st)) { (void) __closedir (dirstream); __set_errno (save); @@ -151,12 +146,7 @@ __ttyname_r (int fd, char *buf, size_t buflen) /* Verify readlink result, fall back on iterating through devices. */ if (buf[0] == '/' && __xstat64 (_STAT_VER, buf, &st1) == 0 -#ifdef _STATBUF_ST_RDEV - && S_ISCHR (st1.st_mode) - && st1.st_rdev == st.st_rdev -#endif - && st1.st_ino == st.st_ino - && st1.st_dev == st.st_dev) + && is_mytty (&st, &st1)) return 0; /* If the link doesn't exist, then it points to a device in another @@ -175,13 +165,8 @@ __ttyname_r (int fd, char *buf, size_t buflen) if (__xstat64 (_STAT_VER, buf, &st1) == 0 && S_ISDIR (st1.st_mode)) { -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, - &dostat); -#endif } else { @@ -193,26 +178,16 @@ __ttyname_r (int fd, char *buf, size_t buflen) { buf[sizeof ("/dev/") - 1] = '\0'; buflen += sizeof ("pts/") - 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, save, - &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, save, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#endif } if (ret && dostat != -1) { buf[sizeof ("/dev/") - 1] = '\0'; dostat = 1; -#ifdef _STATBUF_ST_RDEV - ret = getttyname_r (buf, buflen, st.st_rdev, st.st_ino, - save, &dostat); -#else - ret = getttyname_r (buf, buflen, st.st_dev, st.st_ino, + ret = getttyname_r (buf, buflen, &st, save, &dostat); -#endif } return ret;