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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 | /* vi: set sw=4 ts=4: */ /* * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //applet:IF_BOOTCHARTD(APPLET(bootchartd, _BB_DIR_SBIN, _BB_SUID_DROP)) //kbuild:lib-$(CONFIG_BOOTCHARTD) += bootchartd.o //config:config BOOTCHARTD //config: bool "bootchartd" //config: default y //config: help //config: bootchartd is commonly used to profile the boot process //config: for the purpose of speeding it up. In this case, it is started //config: by the kernel as the init process. This is configured by adding //config: the init=/sbin/bootchartd option to the kernel command line. //config: //config: It can also be used to monitor the resource usage of a specific //config: application or the running system in general. In this case, //config: bootchartd is started interactively by running bootchartd start //config: and stopped using bootchartd stop. //config: //config:config FEATURE_BOOTCHARTD_BLOATED_HEADER //config: bool "Compatible, bloated header" //config: default y //config: depends on BOOTCHARTD //config: help //config: Create extended header file compatible with "big" bootchartd. //config: "Big" bootchartd is a shell script and it dumps some //config: "convenient" info int the header, such as: //config: title = Boot chart for `hostname` (`date`) //config: system.uname = `uname -srvm` //config: system.release = `cat /etc/DISTRO-release` //config: system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($cpucount) //config: system.kernel.options = `cat /proc/cmdline` //config: This data is not mandatory for bootchart graph generation, //config: and is considered bloat. Nevertheless, this option //config: makes bootchartd applet to dump a subset of it. //config: //config:config FEATURE_BOOTCHARTD_CONFIG_FILE //config: bool "Support bootchartd.conf" //config: default y //config: depends on BOOTCHARTD //config: help //config: Enable reading and parsing of $PWD/bootchartd.conf //config: and /etc/bootchartd.conf files. #include "libbb.h" /* After libbb.h, since it needs sys/types.h on some systems */ #include <sys/utsname.h> #ifdef __linux__ # include <sys/mount.h> # ifndef MS_SILENT # define MS_SILENT (1 << 15) # endif # ifndef MNT_DETACH # define MNT_DETACH 0x00000002 # endif #endif #define BC_VERSION_STR "0.8" /* For debugging, set to 0: * strace won't work with DO_SIGNAL_SYNC set to 1. */ #define DO_SIGNAL_SYNC 1 //$PWD/bootchartd.conf and /etc/bootchartd.conf: //supported options: //# Sampling period (in seconds) //SAMPLE_PERIOD=0.2 // //not yet supported: //# tmpfs size //# (32 MB should suffice for ~20 minutes worth of log data, but YMMV) //TMPFS_SIZE=32m // //# Whether to enable and store BSD process accounting information. The //# kernel needs to be configured to enable v3 accounting //# (CONFIG_BSD_PROCESS_ACCT_V3). accton from the GNU accounting utilities //# is also required. //PROCESS_ACCOUNTING="no" // //# Tarball for the various boot log files //BOOTLOG_DEST=/var/log/bootchart.tgz // //# Whether to automatically stop logging as the boot process completes. //# The logger will look for known processes that indicate bootup completion //# at a specific runlevel (e.g. gdm-binary, mingetty, etc.). //AUTO_STOP_LOGGER="yes" // //# Whether to automatically generate the boot chart once the boot logger //# completes. The boot chart will be generated in $AUTO_RENDER_DIR. //# Note that the bootchart package must be installed. //AUTO_RENDER="no" // //# Image format to use for the auto-generated boot chart //# (choose between png, svg and eps). //AUTO_RENDER_FORMAT="png" // //# Output directory for auto-generated boot charts //AUTO_RENDER_DIR="/var/log" /* Globals */ struct globals { char jiffy_line[COMMON_BUFSIZE]; } FIX_ALIASING; #define G (*(struct globals*)&bb_common_bufsiz1) #define INIT_G() do { } while (0) static void dump_file(FILE *fp, const char *filename) { int fd = open(filename, O_RDONLY); if (fd >= 0) { fputs(G.jiffy_line, fp); fflush(fp); bb_copyfd_eof(fd, fileno(fp)); close(fd); fputc('\n', fp); } } static int dump_procs(FILE *fp, int look_for_login_process) { struct dirent *entry; DIR *dir = opendir("/proc"); int found_login_process = 0; fputs(G.jiffy_line, fp); while ((entry = readdir(dir)) != NULL) { char name[sizeof("/proc/%u/cmdline") + sizeof(int)*3]; int stat_fd; unsigned pid = bb_strtou(entry->d_name, NULL, 10); if (errno) continue; /* Android's version reads /proc/PID/cmdline and extracts * non-truncated process name. Do we want to do that? */ sprintf(name, "/proc/%u/stat", pid); stat_fd = open(name, O_RDONLY); if (stat_fd >= 0) { char *p; char stat_line[4*1024]; int rd = safe_read(stat_fd, stat_line, sizeof(stat_line)-2); close(stat_fd); if (rd < 0) continue; stat_line[rd] = '\0'; p = strchrnul(stat_line, '\n'); *p++ = '\n'; *p = '\0'; fputs(stat_line, fp); if (!look_for_login_process) continue; p = strchr(stat_line, '('); if (!p) continue; p++; strchrnul(p, ')')[0] = '\0'; /* Is it gdm, kdm or a getty? */ if (((p[0] == 'g' || p[0] == 'k' || p[0] == 'x') && p[1] == 'd' && p[2] == 'm') || strstr(p, "getty") ) { found_login_process = 1; } } } closedir(dir); fputc('\n', fp); return found_login_process; } static char *make_tempdir(void) { char template[] = "/tmp/bootchart.XXXXXX"; char *tempdir = xstrdup(mkdtemp(template)); if (!tempdir) { #ifdef __linux__ /* /tmp is not writable (happens when we are used as init). * Try to mount a tmpfs, them cd and lazily unmount it. * Since we unmount it at once, we can mount it anywhere. * Try a few locations which are likely ti exist. */ static const char dirs[] = "/mnt\0""/tmp\0""/boot\0""/proc\0"; const char *try_dir = dirs; while (mount("none", try_dir, "tmpfs", MS_SILENT, "size=16m") != 0) { try_dir += strlen(try_dir) + 1; if (!try_dir[0]) bb_perror_msg_and_die("can't %smount tmpfs", ""); } //bb_error_msg("mounted tmpfs on %s", try_dir); xchdir(try_dir); if (umount2(try_dir, MNT_DETACH) != 0) { bb_perror_msg_and_die("can't %smount tmpfs", "un"); } #else bb_perror_msg_and_die("can't create temporary directory"); #endif } else { xchdir(tempdir); } return tempdir; } static void do_logging(unsigned sample_period_us) { //# Enable process accounting if configured //if [ "$PROCESS_ACCOUNTING" = "yes" ]; then // [ -e kernel_pacct ] || : > kernel_pacct // accton kernel_pacct //fi FILE *proc_stat = xfopen("proc_stat.log", "w"); FILE *proc_diskstats = xfopen("proc_diskstats.log", "w"); //FILE *proc_netdev = xfopen("proc_netdev.log", "w"); FILE *proc_ps = xfopen("proc_ps.log", "w"); int look_for_login_process = (getppid() == 1); unsigned count = 60*1000*1000 / sample_period_us; /* ~1 minute */ while (--count && !bb_got_signal) { char *p; int len = open_read_close("/proc/uptime", G.jiffy_line, sizeof(G.jiffy_line)-2); if (len < 0) goto wait_more; /* /proc/uptime has format "NNNNNN.MM NNNNNNN.MM" */ /* we convert it to "NNNNNNMM\n" (using first value) */ G.jiffy_line[len] = '\0'; p = strchr(G.jiffy_line, '.'); if (!p) goto wait_more; while (isdigit(*++p)) p[-1] = *p; p[-1] = '\n'; p[0] = '\0'; dump_file(proc_stat, "/proc/stat"); dump_file(proc_diskstats, "/proc/diskstats"); //dump_file(proc_netdev, "/proc/net/dev"); if (dump_procs(proc_ps, look_for_login_process)) { /* dump_procs saw a getty or {g,k,x}dm * stop logging in 2 seconds: */ if (count > 2*1000*1000 / sample_period_us) count = 2*1000*1000 / sample_period_us; } fflush_all(); wait_more: usleep(sample_period_us); } // [ -e kernel_pacct ] && accton off } static void finalize(char *tempdir, const char *prog) { //# Stop process accounting if configured //local pacct= //[ -e kernel_pacct ] && pacct=kernel_pacct FILE *header_fp = xfopen("header", "w"); if (prog) fprintf(header_fp, "profile.process = %s\n", prog); fputs("version = "BC_VERSION_STR"\n", header_fp); if (ENABLE_FEATURE_BOOTCHARTD_BLOATED_HEADER) { char *hostname; char *kcmdline; time_t t; struct tm tm_time; /* x2 for possible localized weekday/month names */ char date_buf[sizeof("Mon Jun 21 05:29:03 CEST 2010") * 2]; struct utsname unamebuf; hostname = safe_gethostname(); time(&t); localtime_r(&t, &tm_time); strftime(date_buf, sizeof(date_buf), "%a %b %e %H:%M:%S %Z %Y", &tm_time); fprintf(header_fp, "title = Boot chart for %s (%s)\n", hostname, date_buf); if (ENABLE_FEATURE_CLEAN_UP) free(hostname); uname(&unamebuf); /* never fails */ /* same as uname -srvm */ fprintf(header_fp, "system.uname = %s %s %s %s\n", unamebuf.sysname, unamebuf.release, unamebuf.version, unamebuf.machine ); //system.release = `cat /etc/DISTRO-release` //system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($cpucount) kcmdline = xmalloc_open_read_close("/proc/cmdline", NULL); /* kcmdline includes trailing "\n" */ fprintf(header_fp, "system.kernel.options = %s", kcmdline); if (ENABLE_FEATURE_CLEAN_UP) free(kcmdline); } fclose(header_fp); /* Package log files */ system("tar -zcf /var/log/bootchart.tgz header *.log"); // + $pacct /* Clean up (if we are not in detached tmpfs) */ if (tempdir) { unlink("header"); unlink("proc_stat.log"); unlink("proc_diskstats.log"); //unlink("proc_netdev.log"); unlink("proc_ps.log"); rmdir(tempdir); } /* shell-based bootchartd tries to run /usr/bin/bootchart if $AUTO_RENDER=yes: * /usr/bin/bootchart -o "$AUTO_RENDER_DIR" -f $AUTO_RENDER_FORMAT "$BOOTLOG_DEST" */ } //usage:#define bootchartd_trivial_usage //usage: "start [PROG ARGS]|stop|init" //usage:#define bootchartd_full_usage "\n\n" //usage: "Create /var/log/bootchart.tgz with boot chart data\n" //usage: "\nOptions:" //usage: "\nstart: start background logging; with PROG, run PROG, then kill logging with USR1" //usage: "\nstop: send USR1 to all bootchartd processes" //usage: "\ninit: start background logging; stop when getty/xdm is seen (for init scripts)" //usage: "\nUnder PID 1: as init, then exec $bootchart_init, /init, /sbin/init" int bootchartd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int bootchartd_main(int argc UNUSED_PARAM, char **argv) { unsigned sample_period_us; pid_t parent_pid, logger_pid; smallint cmd; enum { CMD_STOP = 0, CMD_START, CMD_INIT, CMD_PID1, /* used to mark pid 1 case */ }; INIT_G(); parent_pid = getpid(); if (argv[1]) { cmd = index_in_strings("stop\0""start\0""init\0", argv[1]); if (cmd < 0) bb_show_usage(); if (cmd == CMD_STOP) { pid_t *pidList = find_pid_by_name("bootchartd"); while (*pidList != 0) { if (*pidList != parent_pid) kill(*pidList, SIGUSR1); pidList++; } return EXIT_SUCCESS; } } else { if (parent_pid != 1) bb_show_usage(); cmd = CMD_PID1; } /* Here we are in START, INIT or CMD_PID1 state */ /* Read config file: */ sample_period_us = 200 * 1000; if (ENABLE_FEATURE_BOOTCHARTD_CONFIG_FILE) { char* token[2]; parser_t *parser = config_open2("/etc/bootchartd.conf" + 5, fopen_for_read); if (!parser) parser = config_open2("/etc/bootchartd.conf", fopen_for_read); while (config_read(parser, token, 2, 0, "#=", PARSE_NORMAL & ~PARSE_COLLAPSE)) { if (strcmp(token[0], "SAMPLE_PERIOD") == 0 && token[1]) sample_period_us = atof(token[1]) * 1000000; } config_close(parser); } if ((int)sample_period_us <= 0) sample_period_us = 1; /* prevent division by 0 */ /* Create logger child: */ logger_pid = fork_or_rexec(argv); if (logger_pid == 0) { /* child */ char *tempdir; bb_signals(0 + (1 << SIGUSR1) + (1 << SIGUSR2) + (1 << SIGTERM) + (1 << SIGQUIT) + (1 << SIGINT) + (1 << SIGHUP) , record_signo); if (DO_SIGNAL_SYNC) /* Inform parent that we are ready */ raise(SIGSTOP); /* If we are started by kernel, PATH might be unset. * In order to find "tar", let's set some sane PATH: */ if (cmd == CMD_PID1 && !getenv("PATH")) putenv((char*)bb_PATH_root_path); tempdir = make_tempdir(); do_logging(sample_period_us); finalize(tempdir, cmd == CMD_START ? argv[2] : NULL); return EXIT_SUCCESS; } /* parent */ if (DO_SIGNAL_SYNC) { /* Wait for logger child to set handlers, then unpause it. * Otherwise with short-lived PROG (e.g. "bootchartd start true") * we might send SIGUSR1 before logger sets its handler. */ waitpid(logger_pid, NULL, WUNTRACED); kill(logger_pid, SIGCONT); } if (cmd == CMD_PID1) { char *bootchart_init = getenv("bootchart_init"); if (bootchart_init) execl(bootchart_init, bootchart_init, NULL); execl("/init", "init", NULL); execl("/sbin/init", "init", NULL); bb_perror_msg_and_die("can't execute '%s'", "/sbin/init"); } if (cmd == CMD_START && argv[2]) { /* "start PROG ARGS" */ pid_t pid = xvfork(); if (pid == 0) { /* child */ argv += 2; execvp(argv[0], argv); bb_perror_msg_and_die("can't execute '%s'", argv[0]); } /* parent */ waitpid(pid, NULL, 0); kill(logger_pid, SIGUSR1); } return EXIT_SUCCESS; } |