/* 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-$(CONFIG_BOOTCHARTD) += bootchartd.o
+
//config:config BOOTCHARTD
//config: bool "bootchartd"
//config: default y
//config: and stopped using bootchartd stop.
//config:
//config:config FEATURE_BOOTCHARTD_BLOATED_HEADER
-//config: bool "bootchartd"
+//config: bool "Compatible, bloated header"
//config: default y
//config: depends on BOOTCHARTD
//config: help
//config: makes bootchartd applet to dump a subset of it.
//config:
//config:config FEATURE_BOOTCHARTD_CONFIG_FILE
-//config: bool "bootchartd"
+//config: bool "Support bootchartd.conf"
//config: default y
//config: depends on BOOTCHARTD
//config: help
#include "libbb.h"
/* After libbb.h, since it needs sys/types.h on some systems */
#include <sys/utsname.h>
-#include <sys/mount.h>
-#ifndef MS_SILENT
-# define MS_SILENT (1 << 15)
-#endif
-#ifndef MNT_DETACH
-# define MNT_DETACH 0x00000002
+
+#ifdef __linux__
+# include <sys/mount.h>
+# ifndef MS_SILENT
+# define MS_SILENT (1 << 15)
+# endif
+# ifndef MNT_DETACH
+# define MNT_DETACH 0x00000002
+# endif
#endif
#define BC_VERSION_STR "0.8"
continue;
p++;
strchrnul(p, ')')[0] = '\0';
- /* If is gdm, kdm or a getty? */
+ /* Is it gdm, kdm or a getty? */
if (((p[0] == 'g' || p[0] == 'k' || p[0] == 'x') && p[1] == 'd' && p[2] == 'm')
|| strstr(p, "getty")
) {
char template[] = "/tmp/bootchart.XXXXXX";
char *tempdir = xstrdup(mkdtemp(template));
if (!tempdir) {
+#ifdef __linux__
/* /tmp is not writable (happens when we are used as init).
* Try to mount a tmpfs, them cd and lazily unmount it.
* Since we unmount it at once, we can mount it anywhere.
if (umount2(try_dir, MNT_DETACH) != 0) {
bb_perror_msg_and_die("can't %smount tmpfs", "un");
}
+#else
+ bb_perror_msg_and_die("can't create temporary directory");
+#endif
} else {
xchdir(tempdir);
}
return tempdir;
}
-static void do_logging(int sample_period_us)
+static void do_logging(unsigned sample_period_us)
{
//# Enable process accounting if configured
//if [ "$PROCESS_ACCOUNTING" = "yes" ]; then
//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 */
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:
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 data */
+ /* x2 for possible localized weekday/month names */
char date_buf[sizeof("Mon Jun 21 05:29:03 CEST 2010") * 2];
struct utsname unamebuf;
*/
}
-/* Usage:
- * bootchartd start [PROG ARGS]: start logging in background, USR1 stops it.
- * With PROG, runs PROG, then kills background logging.
- * bootchartd stop: same as "killall -USR1 bootchartd"
- * bootchartd init: start logging in background
- * Stop when getty/gdm is seen (if AUTO_STOP_LOGGER = yes).
- * Meant to be used from init scripts.
- * bootchartd (pid==1): as init, but then execs $bootchart_init, /init, /sbin/init
- * Meant to be used as kernel's init process.
- */
+//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)
{
- int sample_period_us;
+ unsigned sample_period_us;
pid_t parent_pid, logger_pid;
smallint cmd;
enum {
cmd = CMD_PID1;
}
- /* Here we are in START or INIT state */
+ /* Here we are in START, INIT or CMD_PID1 state */
/* Read config file: */
sample_period_us = 200 * 1000;
}
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);
execl(bootchart_init, bootchart_init, NULL);
execl("/init", "init", NULL);
execl("/sbin/init", "init", NULL);
- bb_perror_msg_and_die("can't exec '%s'", "/sbin/init");
+ bb_perror_msg_and_die("can't execute '%s'", "/sbin/init");
}
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 exec '%s'", argv[0]);
+ BB_EXECVP_or_die(argv);
}
/* parent */
waitpid(pid, NULL, 0);
projects / oweals / busybox.git / blobdiff