/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2012 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdio.h> #include <getopt.h> #include <stddef.h> #include <stdlib.h> #include <unistd.h> #include <errno.h> #include <string.h> #include "util.h" #include "def.h" #include "readahead-common.h" unsigned arg_files_max = 16*1024; off_t arg_file_size_max = READAHEAD_FILE_SIZE_MAX; usec_t arg_timeout = 2*USEC_PER_MINUTE; static int help(void) { printf("%s [OPTIONS...] collect [DIRECTORY]\n\n" "Collect read-ahead data on early boot.\n\n" " -h --help Show this help\n" " --max-files=INT Maximum number of files to read ahead\n" " --file-size-max=BYTES Maximum size of files to read ahead\n" " --timeout=USEC Maximum time to spend collecting data\n\n\n", program_invocation_short_name); printf("%s [OPTIONS...] replay [DIRECTORY]\n\n" "Replay collected read-ahead data on early boot.\n\n" " -h --help Show this help\n" " --file-size-max=BYTES Maximum size of files to read ahead\n\n\n", program_invocation_short_name); printf("%s [OPTIONS...] analyze [PACK FILE]\n\n" "Analyze collected read-ahead data.\n\n" " -h --help Show this help\n", program_invocation_short_name); return 0; } static int parse_argv(int argc, char *argv[]) { enum { ARG_FILES_MAX = 0x100, ARG_FILE_SIZE_MAX, ARG_TIMEOUT }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "files-max", required_argument, NULL, ARG_FILES_MAX }, { "file-size-max", required_argument, NULL, ARG_FILE_SIZE_MAX }, { "timeout", required_argument, NULL, ARG_TIMEOUT }, { NULL, 0, NULL, 0 } }; int c; assert(argc >= 0); assert(argv); while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { switch (c) { case 'h': help(); return 0; case ARG_FILES_MAX: if (safe_atou(optarg, &arg_files_max) < 0 || arg_files_max <= 0) { log_error("Failed to parse maximum number of files %s.", optarg); return -EINVAL; } break; case ARG_FILE_SIZE_MAX: { unsigned long long ull; if (safe_atollu(optarg, &ull) < 0 || ull <= 0) { log_error("Failed to parse maximum file size %s.", optarg); return -EINVAL; } arg_file_size_max = (off_t) ull; break; } case ARG_TIMEOUT: if (parse_usec(optarg, &arg_timeout) < 0 || arg_timeout <= 0) { log_error("Failed to parse timeout %s.", optarg); return -EINVAL; } break; case '?': return -EINVAL; default: log_error("Unknown option code %c", c); return -EINVAL; } } if (optind != argc-1 && optind != argc-2) { help(); return -EINVAL; } return 1; } int main(int argc, char *argv[]) { int r; log_set_target(LOG_TARGET_SAFE); log_parse_environment(); log_open(); umask(0022); r = parse_argv(argc, argv); if (r <= 0) return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; if (streq(argv[optind], "collect")) return main_collect(argv[optind+1]); else if (streq(argv[optind], "replay")) return main_replay(argv[optind+1]); else if (streq(argv[optind], "analyze")) return main_analyze(argv[optind+1]); log_error("Unknown verb %s.", argv[optind]); return EXIT_FAILURE; }