X-Git-Url: http://git.tuebingen.mpg.de/?p=adu.git;a=blobdiff_plain;f=select.c;h=05302570ff5ba740731c3ba815c62b5f8da2e1fc;hp=b3946763e24f6b4ea7aa449bf6fdbaad32fb30fb;hb=cecbe8525740b4a899cb1a6c91064e195ae1ada2;hpb=cab88f141a9550dcceee0ad8eab978660e0ae0de

diff --git a/select.c b/select.c
index b394676..0530257 100644
--- a/select.c
+++ b/select.c
@@ -14,6 +14,14 @@
 #include "string.h"
 #include "error.h"
 #include "portable_io.h"
+#include "select.cmdline.h"
+
+/** Global dir count. */
+static uint64_t num_dirs;
+/** Global files count. */
+static uint64_t num_files;
+/** Global bytes count. */
+static uint64_t num_bytes;
 
 /** The decimal representation of an uint64_t never exceeds that size. */
 #define FORMATED_VALUE_SIZE 25
@@ -69,7 +77,6 @@ static const uint64_t count_unit_divisors[] = {
 
 static const char size_unit_abbrevs[] = " BKMGT";
 static const char count_unit_abbrevs[] = "  kmgt";
-
 static enum enum_size_unit format_size_value(enum enum_size_unit unit,
 		uint64_t value, int print_unit, char *result)
 {
@@ -104,39 +111,55 @@ static enum enum_count_unit format_count_value(enum enum_count_unit unit,
 	return u;
 }
 
+static FILE *output_file;
+
+__printf_1_2 static int output(const char const *fmt, ...)
+{
+	va_list argp;
+	int ret;
+
+	va_start(argp, fmt);
+	ret = vfprintf(output_file, fmt, argp);
+	va_end(argp);
+	return ret < 0? -E_OUTPUT : 1;
+}
+
 static int get_dir_name_by_number(uint64_t *dirnum, char **name)
 {
 	char *result = NULL, *tmp;
 	struct osl_row *row;
 	uint64_t val = *dirnum;
-	struct osl_object obj = {.data = &val, .size = sizeof(val)};
+	struct osl_object obj;
 	int ret;
+	char *pfx;
 
 again:
+	obj.data = &val;
+	obj.size = sizeof(val);
 	ret = osl(osl_get_row(dir_table, DT_NUM, &obj, &row));
 	if (ret < 0)
 		goto out;
-	ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
-	if (ret < 0)
-		goto out;
-	if (result) {
-		tmp = make_message("%s/%s", (char *)obj.data, result);
-		free(result);
-		result = tmp;
-	} else
-		result = adu_strdup((char *)obj.data);
 	ret = osl(osl_get_object(dir_table, row, DT_PARENT_NUM, &obj));
 	if (ret < 0)
 		goto out;
 	val = *(uint64_t *)obj.data;
+	ret = osl(osl_get_object(dir_table, row, DT_NAME, &obj));
+	if (ret < 0)
+		goto out;
+	pfx = (select_conf.print_base_dir_given || val)? (char *)obj.data :  ".";
+	tmp = make_message("%s/%s", pfx, result? result : "");
+	free(result);
+	result = tmp;
 	if (val)
 		goto again;
 out:
 	if (ret < 0) {
 		free(result);
 		*name = NULL;
-	} else
+	} else {
+		assert(result);
 		*name = result;
+	}
 	return ret;
 }
 
@@ -144,30 +167,14 @@ static int get_dir_name_of_row(struct osl_row *dir_table_row, char **name)
 {
 	struct osl_object obj;
 	int ret;
-	char *this_dir, *prefix = NULL;
 
 	*name = NULL;
-	ret = osl(osl_get_object(dir_table, dir_table_row, DT_NAME, &obj));
+	ret = osl(osl_get_object(dir_table, dir_table_row, DT_NUM, &obj));
 	if (ret < 0)
 		return ret;
-	this_dir = adu_strdup((char *)obj.data);
-	ret = osl(osl_get_object(dir_table, dir_table_row, DT_PARENT_NUM, &obj));
-	if (ret < 0)
-		goto out;
-	if (!*(uint64_t *)obj.data) {
-		*name = this_dir;
-		return 1;
-	}
-	ret = get_dir_name_by_number((uint64_t *)obj.data, &prefix);
-	if (ret < 0)
-		goto out;
-	*name = make_message("%s/%s", prefix, this_dir);
-	free(prefix);
-	ret = 1;
-out:
-	free(this_dir);
-	return ret;
+	return get_dir_name_by_number((uint64_t *)obj.data, name);
 }
+
 static int user_stats_loop_function(struct osl_row *row, void *data)
 {
 	struct user_stats_info *usi = data;
@@ -187,13 +194,14 @@ static int user_stats_loop_function(struct osl_row *row, void *data)
 			goto err;
 		files = *(uint64_t *)obj.data;
 		if (usi->count && (usi->flags & USF_PRINT_FILES)) {
-			format_count_value(conf.count_unit_arg, files,
-				conf.count_unit_arg == count_unit_arg_h,
+			format_count_value(select_conf.count_unit_arg, files,
+				select_conf.count_unit_arg == count_unit_arg_h,
 				formated_value);
-			printf("\t%s%s", formated_value,
+			ret = output("\t%s%s", formated_value,
 				(usi->flags & (USF_PRINT_BYTES | USF_PRINT_DIRNAME))?
-					"\t" : "\n"
-			);
+					"\t" : "\n");
+			if (ret < 0)
+				goto err;
 		}
 		if (summary)
 			usi->ui->files += files;
@@ -205,14 +213,16 @@ static int user_stats_loop_function(struct osl_row *row, void *data)
 			goto err;
 		bytes = *(uint64_t *)obj.data;
 		if (usi->count && (usi->flags & USF_PRINT_BYTES)) {
-			format_size_value(conf.size_unit_arg, bytes,
-				conf.size_unit_arg == size_unit_arg_h,
+			format_size_value(select_conf.size_unit_arg, bytes,
+				select_conf.size_unit_arg == size_unit_arg_h,
 				formated_value);
-			printf("%s%s%s",
+			ret = output("%s%s%s",
 				(usi->flags & USF_PRINT_FILES)? "" : "\t",
 				formated_value,
 				usi->flags & USF_PRINT_DIRNAME?  "\t" : "\n"
 			);
+			if (ret < 0)
+				goto err;
 		}
 		if (summary) {
 			usi->ui->bytes += bytes;
@@ -228,10 +238,12 @@ static int user_stats_loop_function(struct osl_row *row, void *data)
 		ret = get_dir_name_by_number((uint64_t *)obj.data, &dirname);
 		if (ret < 0)
 			goto err;
-		printf("%s%s\n",
+		ret = output("%s%s\n",
 			(usi->flags & (USF_PRINT_BYTES | USF_PRINT_FILES))? "" : "\t",
 			dirname);
 		free(dirname);
+		if (ret < 0)
+			goto err;
 	}
 	if (usi->count > 0)
 		usi->count--;
@@ -261,12 +273,14 @@ static int global_stats_loop_function(struct osl_row *row, void *data)
 			goto err;
 		files = *(uint64_t *)obj.data;
 		if (gsi->count && (gsi->flags & GSF_PRINT_FILES)) {
-			format_count_value(conf.count_unit_arg, files,
-				conf.count_unit_arg == count_unit_arg_h,
+			format_count_value(select_conf.count_unit_arg, files,
+				select_conf.count_unit_arg == count_unit_arg_h,
 				formated_value);
-			printf("\t%s%s", formated_value,
+			ret = output("\t%s%s", formated_value,
 				(gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_DIRNAME))?
 				"\t" : "\n");
+			if (ret < 0)
+				goto err;
 		}
 		if (summary)
 			num_files += files;
@@ -278,14 +292,16 @@ static int global_stats_loop_function(struct osl_row *row, void *data)
 			goto err;
 		bytes = *(uint64_t *)obj.data;
 		if (gsi->count && (gsi->flags & GSF_PRINT_BYTES)) {
-			format_size_value(conf.size_unit_arg, bytes,
-				conf.size_unit_arg == size_unit_arg_h,
+			format_size_value(select_conf.size_unit_arg, bytes,
+				select_conf.size_unit_arg == size_unit_arg_h,
 				formated_value);
-			printf("%s%s%s",
+			ret = output("%s%s%s",
 				(gsi->flags & GSF_PRINT_FILES)? "" : "\t",
 				formated_value,
 				(gsi->flags & GSF_PRINT_DIRNAME)? "\t" : "\n"
 			);
+			if (ret < 0)
+				goto err;
 		}
 		if (summary) {
 			num_bytes += bytes;
@@ -296,10 +312,12 @@ static int global_stats_loop_function(struct osl_row *row, void *data)
 		ret = get_dir_name_of_row(row, &dirname);
 		if (ret < 0)
 			goto err;
-		printf("%s%s\n",
+		ret = output("%s%s\n",
 			(gsi->flags & (GSF_PRINT_BYTES | GSF_PRINT_FILES))? "" : "\t",
 			dirname);
 		free(dirname);
+		if (ret < 0)
+			goto err;
 	}
 	if (gsi->count > 0)
 		gsi->count--;
@@ -335,90 +353,235 @@ static int adu_loop_reverse(struct osl_table *t, unsigned col_num, void *private
 	return check_loop_return(ret, *loop_ret, *loop_osl_errno);
 }
 
-static void print_global_summary(void)
+static int print_global_summary(void)
 {
 	char d[FORMATED_VALUE_SIZE], f[FORMATED_VALUE_SIZE],
 		s[FORMATED_VALUE_SIZE];
 	enum enum_count_unit ud, uf;
 	enum enum_size_unit us;
+	int ret;
+
+	if (select_conf.no_global_summary_given)
+		return 1;
+	ud = format_count_value(select_conf.count_unit_arg, num_dirs, 0, d);
+	uf = format_count_value(select_conf.count_unit_arg, num_files, 0, f);
+	us = format_size_value(select_conf.size_unit_arg, num_bytes, 0, s);
+
+	if (!select_conf.no_headers_given) {
+		ret = output("Global summary "
+			"(dirs(%c)/files(%c)/size(%c))\n",
+			count_unit_abbrevs[ud],
+			count_unit_abbrevs[uf],
+			size_unit_abbrevs[us]
+		);
+		if (ret < 0)
+			return ret;
+	}
+	return output("\t%s\t%s\t%s\n\n", d, f, s);
+}
 
-	ud = format_count_value(conf.count_unit_arg, num_dirs, 0, d);
-	uf = format_count_value(conf.count_unit_arg, num_files, 0, f);
-	us = format_size_value(conf.size_unit_arg, num_bytes, 0, s);
-
-	printf("Global summary "
-		"(dirs(%c)/files(%c)/size(%c))\n"
-		"\t%s\t%s\t%s\n\n",
-		count_unit_abbrevs[ud],
-		count_unit_abbrevs[uf],
-		size_unit_abbrevs[us],
-		d, f, s
+static int print_user_summary_line(struct user_info *ui, __a_unused void *data)
+{
+	char formated_dir_count[FORMATED_VALUE_SIZE],
+		formated_file_count[FORMATED_VALUE_SIZE],
+		formated_bytes[FORMATED_VALUE_SIZE ];
+
+	format_count_value(select_conf.count_unit_arg, ui->dirs,
+		select_conf.count_unit_arg == count_unit_arg_h,
+		formated_dir_count);
+	format_count_value(select_conf.count_unit_arg, ui->files,
+		select_conf.count_unit_arg == count_unit_arg_h,
+		formated_file_count);
+	format_size_value(select_conf.size_unit_arg, ui->bytes,
+		select_conf.size_unit_arg == size_unit_arg_h,
+		formated_bytes);
+	return output("\t%s\t%u\t%s\t%s\t%s\n",
+		ui->pw_name? ui->pw_name : "?",
+		(unsigned)ui->uid,
+		formated_dir_count,
+		formated_file_count,
+		formated_bytes
 	);
+}
+
+static int name_comp(const void *a, const void *b)
+{
+	char *x = ((struct user_info *)a)->pw_name;
+	char *y = ((struct user_info *)b)->pw_name;
 
+	if (!x)
+		return 1;
+	if (!y)
+		return -1;
+	return strcmp(x, y);
 }
 
-static void print_id_stats(void)
+static int uid_comp(const void *a, const void *b)
 {
-	struct user_info *ui;
+	return -NUM_COMPARE(((struct user_info *)a)->uid,
+		((struct user_info *)b)->uid);
+}
 
-	printf("User summary "
-		"(pw_name/uid/dirs%s/files%s/size%s):\n",
-		count_unit_buf, count_unit_buf, size_unit_buf);
-	FOR_EACH_USER(ui) {
-		char formated_dir_count[FORMATED_VALUE_SIZE],
-			formated_file_count[FORMATED_VALUE_SIZE],
-			formated_bytes[FORMATED_VALUE_SIZE ];
-		if (!ui_used(ui) || !ui_admissible(ui))
-			continue;
-		format_count_value(conf.count_unit_arg, ui->dirs,
-			conf.count_unit_arg == count_unit_arg_h,
-			formated_dir_count);
-		format_count_value(conf.count_unit_arg, ui->files,
-			conf.count_unit_arg == count_unit_arg_h,
-			formated_file_count);
-		format_size_value(conf.size_unit_arg, ui->bytes,
-			conf.size_unit_arg == size_unit_arg_h,
-			formated_bytes);
-		printf("\t%s\t%u\t%s\t%s\t%s\n",
-			ui->pw_name? ui->pw_name : "?",
-			(unsigned)ui->uid,
-			formated_dir_count,
-			formated_file_count,
-			formated_bytes
-		);
+static int dir_count_comp(const void *a, const void *b)
+{
+	return NUM_COMPARE(((struct user_info *)a)->dirs,
+		((struct user_info *)b)->dirs);
+}
+
+static int file_count_comp(const void *a, const void *b)
+{
+	return NUM_COMPARE(((struct user_info *)a)->files,
+		((struct user_info *)b)->files);
+}
+
+static int size_comp(const void *a, const void *b)
+{
+	return NUM_COMPARE(((struct user_info *)a)->bytes,
+		((struct user_info *)b)->bytes);
+}
+
+/*
+ * The comparators for sorting the user summary.
+ *
+ * This is an array of pointers to functions taking two constant void *
+ * pointers and returning an int.
+ */
+static int (*summary_comparators[])(const void *, const void *) = {
+	[user_summary_sort_arg_name] = name_comp,
+	[user_summary_sort_arg_uid] = uid_comp,
+	[user_summary_sort_arg_dir_count] = dir_count_comp,
+	[user_summary_sort_arg_file_count] = file_count_comp,
+	[user_summary_sort_arg_size] = size_comp,
+};
+
+static int print_user_summary(void)
+{
+	if (select_conf.no_user_summary_given)
+		return 1;
+	if (!select_conf.no_headers_given) {
+		int ret = output("User summary "
+			"(pw_name/uid/dirs%s/files%s/size%s):\n",
+			count_unit_buf, count_unit_buf, size_unit_buf);
+		if (ret < 0)
+			return ret;
 	}
+	sort_hash_table(summary_comparators[select_conf.user_summary_sort_arg]);
+	return for_each_admissible_user(print_user_summary_line, NULL);
 }
 
-static int print_user_stats(void)
+static int print_user_list(struct user_info *ui, __a_unused void *data)
 {
-	struct user_info *ui;
 	int ret;
-
-	FOR_EACH_USER(ui) {
-		struct user_stats_info usi = {
-			.count = conf.limit_arg,
-			.ui = ui
-		};
-		if (!ui_used(ui) || !ui_admissible(ui))
-			continue;
+	struct user_stats_info usi;
+	enum enum_user_list ula = select_conf.user_list_arg;
+	int print_size_list = (ula == user_list_arg_size
+		|| ula == user_list_arg_both);
+
+	if (print_size_list) {
+		usi.count = select_conf.limit_arg;
+		usi.ui = ui;
 		usi.flags = USF_PRINT_DIRNAME | USF_PRINT_BYTES | USF_COMPUTE_SUMMARY;
-		printf("%s (uid %u), by size%s:\n",
-			ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
-			size_unit_buf);
+		if (!select_conf.no_headers_given) {
+			ret = output("%s (uid %u), by size%s:\n",
+				ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
+				size_unit_buf);
+			if (ret < 0)
+				return ret;
+		}
 		ret = adu_loop_reverse(ui->table, UT_BYTES, &usi, user_stats_loop_function,
 			&usi.ret, &usi.osl_errno);
 		if (ret < 0)
 			return ret;
-		printf("\n%s (uid %u), by file count%s:\n",
-			ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
-			count_unit_buf);
-		usi.count = conf.limit_arg,
+		ret = output("\n");
+		if (ret < 0)
+			return ret;
+	}
+	if (ula == user_list_arg_file_count || ula == user_list_arg_both) {
+		if (!select_conf.no_headers_given) {
+			ret = output("%s (uid %u), by file count%s:\n",
+				ui->pw_name? ui->pw_name : "?", (unsigned)ui->uid,
+				count_unit_buf);
+			if (ret < 0)
+				return ret;
+		}
+		usi.count = select_conf.limit_arg,
+		usi.ui = ui;
 		usi.flags = USF_PRINT_DIRNAME | USF_PRINT_FILES;
 		ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
 			&usi.ret, &usi.osl_errno);
 		if (ret < 0)
 			return ret;
-		printf("\n");
+		ret = output("\n");
+		if (ret < 0)
+			return ret;
+	}
+	if (ula == user_list_arg_none && !select_conf.no_user_summary_given) {
+		usi.count = select_conf.limit_arg;
+		usi.ui = ui;
+		usi.flags = USF_COMPUTE_SUMMARY;
+		ret = adu_loop_reverse(ui->table, UT_FILES, &usi, user_stats_loop_function,
+			&usi.ret, &usi.osl_errno);
+		if (ret < 0)
+			return ret;
+	}
+	return 1;
+}
+
+static int print_user_lists(void)
+{
+	return for_each_admissible_user(print_user_list, NULL);
+}
+
+static int print_global_lists(void)
+{
+	struct global_stats_info gsi;
+	int ret;
+	enum enum_global_list gla = select_conf.global_list_arg;
+	int print_size_list = (gla == global_list_arg_size
+		|| gla == global_list_arg_both);
+
+	if (print_size_list) {
+		gsi.count = select_conf.limit_arg;
+		gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY;
+		if (!select_conf.no_headers_given) {
+			ret = output("By size%s:\n", size_unit_buf);
+			if (ret < 0)
+				return ret;
+		}
+		ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
+			global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+		if (ret < 0)
+			return ret;
+		ret = output("\n");
+		if (ret < 0)
+			return ret;
+	}
+	if (gla == global_list_arg_file_count || gla == global_list_arg_both) {
+		gsi.count = select_conf.limit_arg;
+		gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
+		if (!print_size_list)
+			gsi.flags |= GSF_COMPUTE_SUMMARY;
+		if (!select_conf.no_headers_given) {
+			ret = output("By file count%s:\n", count_unit_buf);
+			if (ret < 0)
+				return ret;
+		}
+		ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
+			global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+		if (ret < 0)
+			return ret;
+		ret = output("\n");
+		if (ret < 0)
+			return ret;
+	}
+	if (gla == global_list_arg_none && !select_conf.no_global_summary_given) {
+		/* must compute summary */
+		gsi.count = select_conf.limit_arg;
+		gsi.flags = GSF_COMPUTE_SUMMARY;
+		ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
+			global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+		if (ret < 0)
+			return ret;
 	}
 	return 1;
 }
@@ -426,40 +589,29 @@ static int print_user_stats(void)
 static int print_statistics(void)
 {
 	int ret;
-	struct global_stats_info gsi = {
-		.count = conf.limit_arg,
-		.flags = GSF_PRINT_DIRNAME | GSF_PRINT_BYTES | GSF_COMPUTE_SUMMARY
-	};
-
-	printf("By size%s:\n",
-		size_unit_buf);
-	ret = adu_loop_reverse(dir_table, DT_BYTES, &gsi,
-		global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+
+	ret = print_global_lists();
+	if (ret < 0)
+		return ret;
+	ret = print_global_summary();
 	if (ret < 0)
 		return ret;
-	printf("\n");
-
-	gsi.count = conf.limit_arg;
-	gsi.flags = GSF_PRINT_DIRNAME | GSF_PRINT_FILES;
-	printf("By file count%s:\n",
-		count_unit_buf);
-	ret = adu_loop_reverse(dir_table, DT_FILES, &gsi,
-		global_stats_loop_function, &gsi.ret, &gsi.osl_errno);
+	ret = print_user_lists();
+	if (ret < 0)
+		return ret;
+	ret = print_user_summary();
 	if (ret < 0)
 		return ret;
-	printf("\n");
-	print_global_summary();
-	print_user_stats();
-	print_id_stats();
 	return 1;
 }
 
-static int read_uid_file(void)
+static int read_uid_file(struct uid_range *admissible_uids)
 {
 	size_t size;
 	uint32_t n;
 	char *filename = get_uid_list_name(), *map;
 	int ret = mmap_full_file(filename, O_RDONLY, (void **)&map, &size, NULL);
+	unsigned bits;
 
 	if (ret < 0) {
 		INFO_LOG("failed to map %s\n", filename);
@@ -469,14 +621,17 @@ static int read_uid_file(void)
 	num_uids = size / 4;
 	INFO_LOG("found %u uids in %s\n", (unsigned)num_uids, filename);
 	free(filename);
-	/* hash table size should be a power of two and larger than the number of uids */
-	uid_hash_table_size = 4;
-	while (uid_hash_table_size < num_uids)
-		uid_hash_table_size *= 2;
-	create_hash_table();
+	/*
+	 * Compute number of hash table bits. The hash table size must be a
+	 * power of two and larger than the number of uids.
+	 */
+	bits = 2;
+	while (1 << bits < num_uids)
+		bits++;
+	create_hash_table(bits);
 	for (n = 0; n < num_uids; n++) {
 		uint32_t uid = read_u32(map + n * sizeof(uid));
-		ret = search_uid(uid, OPEN_USER_TABLE, NULL);
+		ret = search_uid(uid, admissible_uids, OPEN_USER_TABLE, NULL);
 		if (ret < 0)
 			goto out;
 	}
@@ -485,28 +640,62 @@ out:
 	return ret;
 }
 
-int com_select(void)
+int run_select_query(struct uid_range *admissible_uids)
 {
 	int ret;
 
-	if (conf.count_unit_arg != count_unit_arg_h)
-		count_unit_buf[1] = count_unit_abbrevs[conf.count_unit_arg];
+	if (select_conf.output_given && strcmp(select_conf.output_arg, "-")) {
+		output_file = fopen(select_conf.output_arg, "w");
+		if (!output_file)
+			return -ERRNO_TO_ERROR(errno);
+	} else
+		output_file = stdout;
+
+	if (select_conf.count_unit_arg != count_unit_arg_h)
+		count_unit_buf[1] = count_unit_abbrevs[select_conf.count_unit_arg];
 	else
 		count_unit_buf[0] = '\0';
-	if (conf.size_unit_arg != size_unit_arg_h)
-		size_unit_buf[1] = size_unit_abbrevs[conf.size_unit_arg];
+	if (select_conf.size_unit_arg != size_unit_arg_h)
+		size_unit_buf[1] = size_unit_abbrevs[select_conf.size_unit_arg];
 	else
 		size_unit_buf[0] = '\0';
 
-	ret = open_dir_table();
+	ret = open_dir_table(0);
 	if (ret < 0)
-		return ret;
+		goto out;
 	check_signals();
-	ret = read_uid_file();
+	ret = read_uid_file(admissible_uids);
 	if (ret < 0)
-		return ret;
+		goto out;
 	check_signals();
 	ret = print_statistics();
+out:
 	close_all_tables();
+	if (output_file != stdout)
+		fclose(output_file);
 	return ret;
 }
+
+int com_select(void)
+{
+	int ret;
+	struct uid_range *admissible_uids = NULL;
+
+	if (conf.select_options_given) {
+		struct select_cmdline_parser_params params = {
+			.override = 1,
+			.initialize = 1,
+			.check_required = 1,
+			.check_ambiguity = 1,
+			.print_errors = 1
+		};
+
+		if (select_cmdline_parser_string_ext(conf.select_options_arg,
+			&select_conf, "select", &params))
+			return -E_SYNTAX;
+		ret = parse_uid_arg(select_conf.uid_arg, &admissible_uids);
+		if (ret < 0)
+			return ret;
+	}
+	return run_select_query(admissible_uids);
+}