diff options
Diffstat (limited to 'lib/dup2.c')
| -rw-r--r-- | lib/dup2.c | 53 |
1 files changed, 52 insertions, 1 deletions
@@ -1,6 +1,6 @@ /* Duplicate an open file descriptor to a specified file descriptor. - Copyright (C) 1999, 2004-2007, 2009-2015 Free Software Foundation, Inc. + Copyright (C) 1999, 2004-2007, 2009-2017 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -85,6 +85,57 @@ ms_windows_dup2 (int fd, int desired_fd) # define dup2 ms_windows_dup2 +# elif defined __KLIBC__ + +# include <InnoTekLIBC/backend.h> + +static int +klibc_dup2dirfd (int fd, int desired_fd) +{ + int tempfd; + int dupfd; + + tempfd = open ("NUL", O_RDONLY); + if (tempfd == -1) + return -1; + + if (tempfd == desired_fd) + { + close (tempfd); + + char path[_MAX_PATH]; + if (__libc_Back_ioFHToPath (fd, path, sizeof (path))) + return -1; + + return open(path, O_RDONLY); + } + + dupfd = klibc_dup2dirfd (fd, desired_fd); + + close (tempfd); + + return dupfd; +} + +static int +klibc_dup2 (int fd, int desired_fd) +{ + int dupfd; + struct stat sbuf; + + dupfd = dup2 (fd, desired_fd); + if (dupfd == -1 && errno == ENOTSUP \ + && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode)) + { + close (desired_fd); + + return klibc_dup2dirfd (fd, desired_fd); + } + + return dupfd; +} + +# define dup2 klibc_dup2 # endif int |