1 files changed, 256 insertions, 0 deletions
diff --git a/tests/progs/ldif-filter.c b/tests/progs/ldif-filter.c
new file mode 100644
index 0000000..355b716
--- /dev/null
+++ b/tests/progs/ldif-filter.c
@@ -0,0 +1,256 @@
+/* ldif-filter -- clean up LDIF testdata from stdin */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2009-2022 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/ctype.h>
+#include <ac/stdlib.h>
+#include <ac/string.h>
+#include <ac/unistd.h>
+#ifdef _WIN32
+#include <fcntl.h>
+#endif
+
+#define DEFAULT_SPECS "ndb=a,null=n"
+
+typedef struct { char   *val; size_t len, alloc; } String;
+typedef struct { String	*val; size_t len, alloc; } Strings;
+
+/* Flags and corresponding program options */
+enum { SORT_ATTRS = 1, SORT_ENTRIES = 2, NO_OUTPUT = 4, DUMMY_FLAG = 8 };
+static const char spec_options[] = "aen"; /* option index = log2(enum flag) */
+
+static const char *progname = "ldif-filter";
+static const String null_string = { NULL, 0, 0 };
+
+static void
+usage( void )
+{
+	fprintf( stderr, "\
+Usage: %s [-b backend] [-s spec[,spec]...]\n\
+Filter standard input by first <spec> matching '[<backend>]=[a][e][n]':\n\
+  - Remove LDIF comments.\n\
+  - 'a': Sort attributes in entries.\n\
+  - 'e': Sort any entries separated by just one empty line.\n\
+  - 'n': Output nothing.\n\
+<backend> defaults to the $BACKEND environment variable.\n\
+Use specs '%s' if no spec on the command line applies.\n",
+		progname, DEFAULT_SPECS );
+	exit( EXIT_FAILURE );
+}
+
+/* Return flags from "backend=flags" in spec; nonzero if backend found */
+static unsigned
+get_flags( const char *backend, const char *spec )
+{
+	size_t len = strlen( backend );
+	unsigned flags = DUMMY_FLAG;
+	const char *end, *tmp;
+
+	for ( ;; spec = end + ( *end != '\0' )) {
+		if ( !*spec )
+			return 0;
+		end = spec + strcspn( spec, "," );
+		if ( !(tmp = memchr( spec, '=', end-spec )))
+			break;
+		if ( tmp-spec == len && !memcmp( spec, backend, len )) {
+			spec = tmp+1;
+			break;
+		}
+	}
+
+	for ( ; spec < end; spec++ ) {
+		if ( (tmp = strchr( spec_options, *spec )) == NULL ) {
+			usage();
+		}
+		flags |= 1U << (tmp - spec_options);
+	}
+	return flags;
+}
+
+#define APPEND(s /* String or Strings */, data, count, isString) do { \
+	size_t slen = (s)->len, salloc = (s)->alloc, sz = sizeof *(s)->val; \
+	if ( salloc <= slen + (count) ) { \
+		(s)->alloc = salloc += salloc + ((count)|7) + 1; \
+		(s)->val   = xrealloc( (s)->val, sz * salloc ); \
+	} \
+	memcpy( (s)->val + slen, data, sz * ((count) + !!(isString)) ); \
+	(s)->len = slen + (count); \
+} while (0)
+
+static void *
+xrealloc( void *ptr, size_t len )
+{
+	if ( (ptr = realloc( ptr, len )) == NULL ) {
+		perror( progname );
+		exit( EXIT_FAILURE );
+	}
+	return ptr;
+}
+
+static int
+cmp( const void *s, const void *t )
+{
+	return strcmp( ((const String *) s)->val, ((const String *) t)->val );
+}
+
+static void
+sort_strings( Strings *ss, size_t offset )
+{
+	qsort( ss->val + offset, ss->len - offset, sizeof(*ss->val), cmp );
+}
+
+/* Build entry ss[n] from attrs ss[n...], and free the attrs */
+static void
+build_entry( Strings *ss, size_t n, unsigned flags, size_t new_len )
+{
+	String *vals = ss->val, *e = &vals[n];
+	size_t end = ss->len;
+	char *ptr;
+
+	if ( flags & SORT_ATTRS ) {
+		sort_strings( ss, n + 1 );
+	}
+	e->val = xrealloc( e->val, e->alloc = new_len + 1 );
+	ptr = e->val + e->len;
+	e->len = new_len;
+	ss->len = ++n;
+	for ( ; n < end; free( vals[n++].val )) {
+		ptr = strcpy( ptr, vals[n].val ) + vals[n].len;
+	}
+	assert( ptr == e->val + new_len );
+}
+
+/* Flush entries to stdout and free them */
+static void
+flush_entries( Strings *ss, const char *sep, unsigned flags )
+{
+	size_t i, end = ss->len;
+	const char *prefix = "";
+
+	if ( flags & SORT_ENTRIES ) {
+		sort_strings( ss, 0 );
+	}
+	for ( i = 0; i < end; i++, prefix = sep ) {
+		if ( printf( "%s%s", prefix, ss->val[i].val ) < 0 ) {
+			perror( progname );
+			exit( EXIT_FAILURE );
+		}
+		free( ss->val[i].val );
+	}
+	ss->len = 0;
+}
+
+static void
+filter_stdin( unsigned flags )
+{
+	char line[256];
+	Strings ss = { NULL, 0, 0 };	/* entries + attrs of partial entry */
+	size_t entries = 0, attrs_totlen = 0, line_len;
+	const char *entry_sep = "\n", *sep = "";
+	int comment = 0, eof = 0, eol, prev_eol = 1;	/* flags */
+	String *s;
+
+	/* LDIF = Entries ss[..entries-1] + sep + attrs ss[entries..] + line */
+	for ( ; !eof || ss.len || *sep; prev_eol = eol ) {
+		if ( eof || (eof = !fgets( line, sizeof(line), stdin ))) {
+			strcpy( line, prev_eol ? "" : *sep ? sep : "\n" );
+		}
+		line_len = strlen( line );
+		eol = (line_len == 0 || line[line_len - 1] == '\n');
+
+		if ( *line == ' ' ) {		/* continuation line? */
+			prev_eol = 0;
+		} else if ( prev_eol ) {	/* start of logical line? */
+			comment = (*line == '#');
+		}
+		if ( comment || (flags & NO_OUTPUT) ) {
+			continue;
+		}
+
+		/* Collect attrs for partial entry in ss[entries...] */
+		if ( !prev_eol && attrs_totlen != 0 ) {
+			goto grow_attr;
+		} else if ( line_len > (*line == '\r' ? 2 : 1) ) {
+			APPEND( &ss, &null_string, 1, 0 ); /* new attr */
+		grow_attr:
+			s = &ss.val[ss.len - 1];
+			APPEND( s, line, line_len, 1 ); /* strcat to attr */
+			attrs_totlen += line_len;
+			continue;
+		}
+
+		/* Empty line - consume sep+attrs or entries+sep */
+		if ( attrs_totlen != 0 ) {
+			entry_sep = sep;
+			if ( entries == 0 )
+				fputs( sep, stdout );
+			build_entry( &ss, entries++, flags, attrs_totlen );
+			attrs_totlen = 0;
+		} else {
+			flush_entries( &ss, entry_sep, flags );
+			fputs( sep, stdout );
+			entries = 0;
+		}
+		sep = "\r\n" + 2 - line_len;	/* sep = copy(line) */
+	}
+
+	free( ss.val );
+}
+
+int
+main( int argc, char **argv )
+{
+	const char *backend = getenv( "BACKEND" ), *specs = "", *tmp;
+	unsigned flags;
+	int i;
+
+	if ( argc > 0 ) {
+		progname = (tmp = strrchr( argv[0], '/' )) ? tmp+1 : argv[0];
+	}
+
+	while ( (i = getopt( argc, argv, "b:s:" )) != EOF ) {
+		switch ( i ) {
+		case 'b':
+			backend = optarg;
+			break;
+		case 's':
+			specs = optarg;
+			break;
+		default:
+			usage();
+		}
+	}
+	if ( optind < argc ) {
+		usage();
+	}
+	if ( backend == NULL ) {
+		backend = "";
+	}
+
+#ifdef _WIN32
+	_setmode(1, _O_BINARY);	/* don't convert \n to \r\n on stdout */
+#endif
+	flags = get_flags( backend, specs );
+	filter_stdin( flags ? flags : get_flags( backend, DEFAULT_SPECS ));
+	if ( fclose( stdout ) == EOF ) {
+		perror( progname );
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}