/* vi: set sw=4 ts=4: */
/*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * 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-$(CONFIG_BOOTCHARTD) += bootchartd.o
+
//config:config BOOTCHARTD
//config: bool "bootchartd"
//config: default y
//config: and stopped using bootchartd stop.
//config:
//config:config FEATURE_BOOTCHARTD_BLOATED_HEADER
-//config: bool "bootchartd"
+//config: bool "Compatible, bloated header"
//config: default y
//config: depends on BOOTCHARTD
//config: help
//config: makes bootchartd applet to dump a subset of it.
//config:
//config:config FEATURE_BOOTCHARTD_CONFIG_FILE
-//config: bool "bootchartd"
+//config: bool "Support bootchartd.conf"
//config: default y
//config: depends on BOOTCHARTD
//config: help
#include "libbb.h"
/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h>
-#include <sys/mount.h>
-#ifndef MS_SILENT
-# define MS_SILENT (1 << 15)
-#endif
-#ifndef MNT_DETACH
-# define MNT_DETACH 0x00000002
+
+#ifdef __linux__
+# include <sys/mount.h>
+# ifndef MS_SILENT
+# define MS_SILENT (1 << 15)
+# endif
+# ifndef MNT_DETACH
+# define MNT_DETACH 0x00000002
+# endif
#endif
#define BC_VERSION_STR "0.8"
char template[] = "/tmp/bootchart.XXXXXX";
char *tempdir = xstrdup(mkdtemp(template));
if (!tempdir) {
+#ifdef __linux__
/* /tmp is not writable (happens when we are used as init).
* Try to mount a tmpfs, them cd and lazily unmount it.
* Since we unmount it at once, we can mount it anywhere.
if (umount2(try_dir, MNT_DETACH) != 0) {
bb_perror_msg_and_die("can't %smount tmpfs", "un");
}
+#else
+ bb_perror_msg_and_die("can't create temporary directory");
+#endif
} else {
xchdir(tempdir);
}
return tempdir;
}
-static void do_logging(int sample_period_us)
+static void do_logging(unsigned sample_period_us, int process_accounting)
{
- //# Enable process accounting if configured
- //if [ "$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 / (200*1000); /* ~1 minute */
+ unsigned count = 60*1000*1000 / sample_period_us; /* ~1 minute */
+
+ if (process_accounting) {
+ close(xopen("kernel_pacct", O_WRONLY | O_CREAT | O_TRUNC));
+ acct("kernel_pacct");
+ }
while (--count && !bb_got_signal) {
char *p;
/* dump_procs saw a getty or {g,k,x}dm
* stop logging in 2 seconds:
*/
- if (count > 2*1000*1000 / (200*1000))
- count = 2*1000*1000 / (200*1000);
+ 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)
+static void finalize(char *tempdir, const char *prog, int process_accounting)
{
//# Stop process accounting if configured
//local pacct=
FILE *header_fp = xfopen("header", "w");
+ if (process_accounting)
+ acct(NULL);
+
if (prog)
fprintf(header_fp, "profile.process = %s\n", prog);
fclose(header_fp);
/* Package log files */
- system("tar -zcf /var/log/bootchart.tgz header *.log"); // + $pacct
+ system(xasprintf("tar -zcf /var/log/bootlog.tgz header %s *.log", process_accounting ? "kernel_pacct" : ""));
/* Clean up (if we are not in detached tmpfs) */
if (tempdir) {
unlink("header");
unlink("proc_diskstats.log");
//unlink("proc_netdev.log");
unlink("proc_ps.log");
+ if (process_accounting)
+ unlink("kernel_pacct");
rmdir(tempdir);
}
//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)"
int bootchartd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int bootchartd_main(int argc UNUSED_PARAM, char **argv)
{
- int sample_period_us;
+ unsigned sample_period_us;
pid_t parent_pid, logger_pid;
smallint cmd;
+ int process_accounting;
enum {
CMD_STOP = 0,
CMD_START,
/* Read config file: */
sample_period_us = 200 * 1000;
+ process_accounting = 0;
if (ENABLE_FEATURE_BOOTCHARTD_CONFIG_FILE) {
char* token[2];
parser_t *parser = config_open2("/etc/bootchartd.conf" + 5, 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;
+ if (strcmp(token[0], "PROCESS_ACCOUNTING") == 0 && token[1]
+ && (strcmp(token[1], "on") == 0 || strcmp(token[1], "yes") == 0)
+ ) {
+ process_accounting = 1;
+ }
}
config_close(parser);
+ if ((int)sample_period_us <= 0)
+ sample_period_us = 1; /* prevent division by 0 */
}
/* Create logger child: */
putenv((char*)bb_PATH_root_path);
tempdir = make_tempdir();
- do_logging(sample_period_us);
- finalize(tempdir, cmd == CMD_START ? argv[2] : NULL);
+ do_logging(sample_period_us, process_accounting);
+ finalize(tempdir, cmd == CMD_START ? argv[2] : NULL, process_accounting);
return EXIT_SUCCESS;
}
/* parent */
+ USE_FOR_NOMMU(argv[0][0] &= 0x7f); /* undo fork_or_rexec() damage */
+
if (DO_SIGNAL_SYNC) {
/* Wait for logger child to set handlers, then unpause it.
* Otherwise with short-lived PROG (e.g. "bootchartd start true")
}
if (cmd == CMD_START && argv[2]) { /* "start PROG ARGS" */
- pid_t pid = vfork();
- if (pid < 0)
- bb_perror_msg_and_die("vfork");
+ 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]);
+ BB_EXECVP_or_die(argv);
}
/* parent */
waitpid(pid, NULL, 0);
projects / oweals / busybox.git / blobdiff