diff options
Diffstat (limited to 'common/sysutils.c')
| -rw-r--r-- | common/sysutils.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/common/sysutils.c b/common/sysutils.c index c7df8722a..e67420f18 100644 --- a/common/sysutils.c +++ b/common/sysutils.c @@ -1,7 +1,7 @@ /* sysutils.c - system helpers * Copyright (C) 1991-2001, 2003-2004, * 2006-2008 Free Software Foundation, Inc. - * Copyright (C) 2013-2014 Werner Koch + * Copyright (C) 2013-2016 Werner Koch * * This file is part of GnuPG. * @@ -83,6 +83,10 @@ #define tohex(n) ((n) < 10 ? ((n) + '0') : (((n) - 10) + 'A')) +/* Flag to tell whether special file names are enabled. See gpg.c for + * an explanation of these file names. */ +static int allow_special_filenames; + static GPGRT_INLINE gpg_error_t my_error_from_syserror (void) @@ -168,6 +172,13 @@ enable_core_dumps (void) } +/* Allow the use of special "-&nnn" style file names. */ +void +enable_special_filenames (void) +{ + allow_special_filenames = 1; +} + /* Return a string which is used as a kind of process ID. */ const byte * @@ -402,6 +413,29 @@ translate_sys2libc_fd_int (int fd, int for_write) } +/* Check whether FNAME has the form "-&nnnn", where N is a non-zero + * number. Returns this number or -1 if it is not the case. If the + * caller wants to use the file descriptor for writing FOR_WRITE shall + * be set to 1. If NOTRANSLATE is set the Windows spefic mapping is + * not done. */ +int +check_special_filename (const char *fname, int for_write, int notranslate) +{ + if (allow_special_filenames + && fname && *fname == '-' && fname[1] == '&') + { + int i; + + fname += 2; + for (i=0; digitp (fname+i); i++ ) + ; + if (!fname[i]) + return notranslate? atoi (fname) + /**/ : translate_sys2libc_fd_int (atoi (fname), for_write); + } + return -1; +} + /* Replacement for tmpfile(). This is required because the tmpfile function of Windows' runtime library is broken, insecure, ignores |