diff options
Diffstat (limited to 'src/ttyname_r.c')
| -rw-r--r-- | src/ttyname_r.c | 105 |
1 files changed, 89 insertions, 16 deletions
diff --git a/src/ttyname_r.c b/src/ttyname_r.c index 810c2175..105e0af5 100644 --- a/src/ttyname_r.c +++ b/src/ttyname_r.c @@ -1,22 +1,21 @@ /* ttyname_r.c - A ttyname_r() replacement. - Copyright (C) 2003, 2004 g10 Code GmbH + Copyright (C) 2003, 2004, 2012 g10 Code GmbH This file is part of GPGME. - + GPGME is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. - + GPGME is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. - + You should have received a copy of the GNU Lesser General Public - License along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA - 02111-1307, USA. */ + License along with this program; if not, see <http://www.gnu.org/licenses/>. + */ #if HAVE_CONFIG_H #include <config.h> @@ -29,29 +28,103 @@ #endif -#ifdef __GNUC__ +#if !HAVE_TTYNAME_R && defined(__GNUC__) # warning ttyname is not thread-safe, and ttyname_r is missing #endif int -ttyname_r (int fd, char *buf, size_t buflen) +_gpgme_ttyname_r (int fd, char *buf, size_t buflen) { +#if HAVE_TTYNAME_R +# if HAVE_BROKEN_TTYNAME_R + /* Solaris fails if BUFLEN is less than 128. OSF/1 5.1 completely + ignores BUFLEN. We use a large buffer to woraround this. */ + { + char largebuf[512]; + size_t namelen; + int rc; + +# if HAVE_POSIXDECL_TTYNAME_R + if (buflen < sizeof (largebuf)) + { + rc = ttyname_r (fd, largebuf, (int)sizeof (largebuf)); + if (!rc) + { + namelen = strlen (largebuf) + 1; + if (namelen > buflen) + rc = ERANGE; + else + memcpy (buf, largebuf, namelen); + } + } + else + rc = ttyname_r (fd, buf, (int)buflen); + +# else /*!HAVE_POSIXDECL_TTYNAME_R*/ + char *name; + + if (buflen < sizeof (largebuf)) + name = ttyname_r (fd, largebuf, (int)sizeof (largebuf)); + else + name = ttyname_r (fd, buf, (int)buflen); + rc = name? 0 : (errno? errno : -1); + if (!rc && buf != name) + { + namelen = strlen (name) + 1; + if (namelen > buflen) + rc = ERANGE; + else + memmove (buf, name, namelen); + } +# endif + + return rc; + } +# else /*!HAVE_BROKEN_TTYNAME_R*/ + { + int rc; + +# if HAVE_POSIXDECL_TTYNAME_R + + rc = ttyname_r (fd, buf, buflen); + +# else /*!HAVE_POSIXDECL_TTYNAME_R*/ + char *name; + size_t namelen; + + name = ttyname_r (fd, buf, (int)buflen); + rc = name? 0 : (errno? errno : -1); + if (!rc && buf != name) + { + namelen = strlen (name) + 1; + if (namelen > buflen) + rc = ERANGE; + else + memmove (buf, name, namelen); + } +# endif + + return rc; + } +# endif /*!HAVE_BROKEN_TTYNAME_R*/ +#else /*!HAVE_TTYNAME_R*/ char *tty; -#if HAVE_W32_SYSTEM +# if HAVE_W32_SYSTEM /* We use this default one for now. AFAICS we only need it to be passed to gpg and in turn to pinentry. Providing a replacement is needed because elsewhere we bail out on error. If we - eventually implement a pinentry for Windows it is uinlikely that + eventually implement a pinentry for Windows it is inlikely that we need a real tty at all. */ - tty = "/dev/tty"; -#else + tty = "/dev/tty"; +# else tty = ttyname (fd); if (!tty) - return errno; -#endif - + return errno? errno : -1; +# endif + strncpy (buf, tty, buflen); buf[buflen - 1] = '\0'; return (strlen (tty) >= buflen) ? ERANGE : 0; +#endif /*!HAVE_TTYNAME_R*/ } |