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https://git.openldap.org/openldap/openldap.git
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118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
/* $OpenLDAP$ */
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/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <ac/stdlib.h>
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#include <ac/string.h>
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#include <ac/unistd.h>
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#ifdef HAVE_IO_H
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#include <io.h>
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#include <lber.h>
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#include <lutil.h>
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#include <ldap_defaults.h>
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char* lutil_progname( const char* name, int argc, char *argv[] )
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{
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char *progname;
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if(argc == 0) {
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return ber_strdup( name );
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}
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progname = strrchr ( argv[0], *LDAP_DIRSEP );
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progname = ber_strdup( progname ? &progname[1] : argv[0] );
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return progname;
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}
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#ifndef HAVE_MKSTEMP
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int mkstemp( char * template )
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{
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#ifdef HAVE_MKTEMP
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return open ( mktemp ( template ), O_RDWR|O_CREAT|O_EXCL, 0600 );
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#else
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return -1;
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#endif
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}
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#endif
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#ifndef HAVE_VSNPRINTF
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#include <ac/stdarg.h>
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#include <ac/signal.h>
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#include <stdio.h>
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/* Write at most n characters to the buffer in str, return the
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* number of chars written or -1 if the buffer would have been
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* overflowed.
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*
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* This is portable to any POSIX-compliant system. We use pipe()
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* to create a valid file descriptor, and then fdopen() it to get
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* a valid FILE pointer. The user's buffer and size are assigned
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* to the FILE pointer using setvbuf. Then we close the read side
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* of the pipe to invalidate the descriptor.
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*
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* If the write arguments all fit into size n, the write will
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* return successfully. If the write is too large, the stdio
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* buffer will need to be flushed to the underlying file descriptor.
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* The flush will fail because it is attempting to write to a
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* broken pipe, and the write will be terminated.
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*
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* Note: glibc's setvbuf is broken, so this code fails on glibc.
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* But that's no loss since glibc provides these functions itself.
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*
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* In practice, the main app will probably have ignored SIGPIPE
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* already, so catching it here is redundant, but harmless.
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*
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* -- hyc, 2002-07-19
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*/
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int vsnprintf( char *str, size_t n, const char *fmt, va_list ap )
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{
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int fds[2], res;
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FILE *f;
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#ifdef SIGPIPE
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RETSIGTYPE (*sig)();
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#endif
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if (pipe( fds )) return -1;
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f = fdopen( fds[1], "w" );
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if ( !f ) {
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close( fds[1] );
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close( fds[0] );
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return -1;
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}
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#ifdef SIGPIPE
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sig = SIGNAL( SIGPIPE, SIG_IGN );
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#endif
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setvbuf( f, str, _IOFBF, n );
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close( fds[0] );
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res = vfprintf( f, fmt, ap );
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fclose( f );
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#ifdef SIGPIPE
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SIGNAL( SIGPIPE, sig );
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#endif
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return res;
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}
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int snprintf( char *str, size_t n, const char *fmt, ... )
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{
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va_list ap;
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int res;
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va_start( ap, fmt );
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res = vsnprintf( str, n, fmt, ap );
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va_end( ap );
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return res;
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}
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#endif /* !HAVE_VSNPRINTF */
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