/* 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.
*/
-
//config:config BOOTCHARTD
-//config: bool "bootchartd"
+//config: bool "bootchartd (10 kb)"
//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: 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: 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 "bootchartd"
+//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` ($cpucount)
-//config: system.kernel.options = `cat /proc/cmdline`
-//config: This data is not mandatory for bootchart graph generation,
-//config: and is considered bloat. Nevertheless, this option
-//config: makes bootchartd applet to dump a subset of it.
+//config: Create extended header file compatible with "big" bootchartd.
+//config: "Big" bootchartd is a shell script and it dumps some
+//config: "convenient" info into the header, such as:
+//config: title = Boot chart for `hostname` (`date`)
+//config: system.uname = `uname -srvm`
+//config: system.release = `cat /etc/DISTRO-release`
+//config: system.cpu = `grep '^model name' /proc/cpuinfo | head -1` ($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 "bootchartd"
+//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.
+//config: Enable reading and parsing of $PWD/bootchartd.conf
+//config: and /etc/bootchartd.conf files.
+
+//applet:IF_BOOTCHARTD(APPLET(bootchartd, BB_DIR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_BOOTCHARTD) += bootchartd.o
#include "libbb.h"
+#include "common_bufsiz.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)
+
+#ifdef __linux__
+# include <sys/mount.h>
+# ifndef MS_SILENT
+# define MS_SILENT (1 << 15)
+# endif
+# ifndef MNT_DETACH
+# define MNT_DETACH 0x00000002
+# endif
#endif
-#ifndef MNT_DETACH
-# define MNT_DETACH 0x00000002
+
+#if !ENABLE_TAR && !ENABLE_WERROR
+# warning Note: bootchartd requires tar command, but you did not select it.
+#elif !ENABLE_FEATURE_SEAMLESS_GZ && !ENABLE_WERROR
+# warning Note: bootchartd requires tar -z support, but you did not select it.
#endif
#define BC_VERSION_STR "0.8"
struct globals {
char jiffy_line[COMMON_BUFSIZE];
} FIX_ALIASING;
-#define G (*(struct globals*)&bb_common_bufsiz1)
-#define INIT_G() do { } while (0)
+#define G (*(struct globals*)bb_common_bufsiz1)
+#define INIT_G() do { setup_common_bufsiz(); } while (0)
static void dump_file(FILE *fp, const char *filename)
{
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')
+ if (((p[0] == 'g' || p[0] == 'k' || p[0] == 'x')
+ && p[1] == 'd' && p[2] == 'm' && p[3] == '\0'
+ )
|| strstr(p, "getty")
) {
found_login_process = 1;
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.
+ * Try to mount a tmpfs, then 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";
+ static const char dirs[] ALIGN1 = "/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 (umount2(try_dir, MNT_DETACH) != 0) {
bb_perror_msg_and_die("can't %smount tmpfs", "un");
}
+#else
+ bb_simple_perror_msg_and_die("can't create temporary directory");
+#endif
} else {
xchdir(tempdir);
}
return tempdir;
}
-static void do_logging(unsigned 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");
int look_for_login_process = (getppid() == 1);
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;
int len = open_read_close("/proc/uptime", G.jiffy_line, sizeof(G.jiffy_line)-2);
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)"
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 */
}
- if ((int)sample_period_us <= 0)
- sample_period_us = 1; /* prevent division by 0 */
/* Create logger child: */
logger_pid = fork_or_rexec(argv);
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")
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