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We now buffer stdout and stderr to a file and flush that when running in parallel. RC_PARALLEL_STARTUP has been renamed to RC_PARALLEL.

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This commit is contained in:
Roy Marples 2007-04-24 11:29:19 +00:00
parent c965f74f46
commit a44abb9577
8 changed files with 158 additions and 239 deletions
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5
ChangeLog
View File

@ -1,6 +1,11 @@
# ChangeLog for Gentoo System Intialization ("rc") scripts
# Copyright 1999-2007 Gentoo Foundation; Distributed under the GPLv2
24 Apr 2007; Roy Marples <uberlord@gentoo.org>:
We now buffer stdout and stderr to a file and flush that when running in
parallel. RC_PARALLEL_STARTUP has been renamed to RC_PARALLEL.
20 Apr 2007; Mike Frysinger <vapier@gentoo.org>:
Automatically mount selinuxfs on /selinux in localmount.

2
conf.d/rc
View File

@ -3,7 +3,7 @@
# Set to "yes" if you want the rc system to try and start services
# in parallel for a slight speed improvement. NOTE: When enabled
# init script output is buffered and displayed in one go when finished.
RC_PARALLEL_STARTUP="no"
RC_PARALLEL="no"
# Set RC_INTERACTIVE to "yes" and you'll be able to press the I key during
# boot so you can choose to start specific services. Set to "no" to disable

18
sh/functions.sh
View File

@ -6,22 +6,14 @@
RC_GOT_FUNCTIONS="yes"
eindent() {
if [ -n "${RC_EBUFFER}" ] ; then
"${RC_LIBDIR}"/bin/eindent
else
RC_EINDENT=$((${RC_EINDENT:-0} + 2))
[ "${RC_EINDENT}" -gt 40 ] && RC_EINDENT=40
export RC_EINDENT
fi
RC_EINDENT=$((${RC_EINDENT:-0} + 2))
[ "${RC_EINDENT}" -gt 40 ] && RC_EINDENT=40
export RC_EINDENT
}
eoutdent() {
if [ -n "${RC_EBUFFER}" ] ; then
"${RC_LIBDIR}"/bin/eoutdent
else
RC_EINDENT=$((${RC_EINDENT:-0} - 2))
[ "${RC_EINDENT}" -lt 0 ] && RC_EINDENT=0
fi
RC_EINDENT=$((${RC_EINDENT:-0} - 2))
[ "${RC_EINDENT}" -lt 0 ] && RC_EINDENT=0
return 0
}

10
src/einfo.h
View File

@ -64,8 +64,12 @@ int ewendv (int retval, const char *fmt, ...) EINFO_PRINTF (2, 3);
void eindentv (void);
void eoutdentv (void);
/* If RC_EBUFFER is set, then we buffer all the above commands.
As such, we need to flush the buffer when done. */
void eflush(void);
/* Handy utils to buffer stdout and stderr so our output is always
* sane when forking around.
* Don't depend on these being here though as we may take a different
* approach at a later date. */
void ebuffer (const char *file);
void eflush (void);
void eclose (void);
#endif

316
src/libeinfo.c
View File

@ -8,6 +8,7 @@
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdbool.h>
@ -32,6 +33,7 @@ hidden_proto(eerror)
hidden_proto(eerrorn)
hidden_proto(eerrorx)
hidden_proto(eflush)
hidden_proto(eclose)
hidden_proto(eindent)
hidden_proto(eindentv)
hidden_proto(einfo)
@ -118,6 +120,11 @@ static const char *color_terms[] = {
NULL
};
/* We use this array to save the stdout/stderr fd's for buffering */
static int stdfd[2] = {-1, -1};
static FILE *ebfp = NULL;
static char ebfile[PATH_MAX] = { '\0' };
static bool is_env (const char *var, const char *val)
{
char *v;
@ -177,194 +184,125 @@ static int get_term_columns (void)
return (DEFAULT_COLS);
}
static int ebuffer (const char *cmd, int retval, const char *fmt, va_list ap)
void ebuffer (const char *file)
{
char *file = getenv ("RC_EBUFFER");
FILE *fp;
char buffer[RC_LINEBUFFER];
int l = 1;
/* Don't ebuffer if we don't have a file or we already are */
if (! file || stdfd[0] >= 0 || ! isatty (fileno (stdout)))
return;
if (! file || ! cmd || strlen (cmd) < 4)
return (0);
/* Save the current fd's */
stdfd[0] = dup (fileno (stdout));
stdfd[1] = dup (fileno (stderr));
if (! (fp = fopen (file, "a"))) {
if (! (ebfp = fopen (file, "w+"))) {
fprintf (stderr, "fopen `%s': %s\n", file, strerror (errno));
return (0);
return;
}
fprintf (fp, "%s %d ", cmd, retval);
snprintf (ebfile, sizeof (ebfile), "%s", file);
if (fmt) {
va_list apc;
va_copy (apc, ap);
l = vsnprintf (buffer, sizeof (buffer), fmt, apc);
fprintf (fp, "%d %s\n", l, buffer);
va_end (apc);
} else
fprintf (fp, "0\n");
fflush (stdout);
fflush (stderr);
fclose (fp);
return (l);
/* Now redirect stdout and stderr */
if ((dup2 (fileno (ebfp), fileno (stdout))) < 0)
fprintf (stderr, "dup2: %s", strerror (errno));
if ((dup2 (fileno (ebfp), fileno (stderr))) < 0)
fprintf (stderr, "dup2: %s", strerror (errno));
/* Store the filename in our environment so scripts can tell if we're
* buffering or not */
unsetenv ("RC_EBUFFER");
setenv ("RC_EBUFFER", file, 1);
return;
}
typedef struct func
static void _eflush (bool reopen)
{
const char *name;
int (*efunc) (const char *fmt, ...);
int (*eefunc) (int retval, const char *fmt, ...);
void (*eind) (void);
} func_t;
static const func_t funcmap[] = {
{ "einfon", &einfon, NULL, NULL },
{ "ewarnn", &ewarnn, NULL, NULL},
{ "eerrorn", &eerrorn, NULL, NULL},
{ "einfo", &einfo, NULL, NULL },
{ "ewarn", &ewarn, NULL, NULL },
{ "eerror", &eerror, NULL, NULL },
{ "ebegin", &ebegin, NULL, NULL },
{ "eend", NULL, &eend, NULL },
{ "ewend", NULL, &ewend, NULL },
{ "eindent", NULL, NULL, &eindent },
{ "eoutdent", NULL, NULL, &eoutdent },
{ "einfovn", &einfovn, NULL, NULL },
{ "ewarnvn", &ewarnvn, NULL, NULL },
{ "einfov", &einfov, NULL, NULL },
{ "ewarnv", &ewarnv, NULL, NULL },
{ "ebeginv", &ebeginv, NULL, NULL },
{ "eendv", NULL, &eendv, NULL },
{ "ewendv", NULL, &ewendv, NULL },
{ "eindentv" ,NULL, NULL, &eindentv },
{ "eoutdentv", NULL, NULL, &eoutdentv },
{ NULL, NULL, NULL, NULL },
};
void eflush (void)
{
FILE *fp;
char *file = getenv ("RC_EBUFFER");
char buffer[RC_LINEBUFFER];
char *cmd;
int retval = 0;
int length = 0;
char *token;
char *p;
struct stat buf;
pid_t pid;
char newfile[PATH_MAX];
int i = 1;
int serrno = errno;
if (! file|| (stat (file, &buf) != 0)) {
errno = 0;
return;
/* eflush called from an init script? */
if (! ebfp) {
char *file = getenv ("RC_EBUFFER");
if (file)
ebfp = fopen (file, "a+");
}
/* Find a unique name for our file */
while (true) {
snprintf (newfile, sizeof (newfile), "%s.%d", file, i);
if (stat (newfile, &buf) != 0) {
if (rename (file, newfile))
fprintf (stderr, "rename `%s' `%s': %s\n", file, newfile,
strerror (errno));
break;
if (! ebfp)
return;
fflush (stdout);
fflush (stderr);
/* Restore stdout and stderr now */
if (stdfd[0] >= 0) {
dup2 (stdfd[0], fileno (stdout));
dup2 (stdfd[1], fileno (stderr));
} else {
char *tty = getenv ("RC_TTY");
if (tty) {
freopen (tty, "w+", stdout);
dup2 (fileno (stdout), fileno (stderr));
}
i++;
}
/* We fork a child process here so we don't hold anything up */
if ((pid = fork ()) == -1) {
fprintf (stderr, "fork: %s", strerror (errno));
return;
}
if (pid != 0)
return;
/* Spin until we can lock the ebuffer */
while (true) {
struct timeval tv;
errno = 0;
if (mkfifo (EBUFFER_LOCK, 0700) == 0)
break;
if (errno != EEXIST)
eerror ("mkfifo `%s': %s\n", EBUFFER_LOCK, strerror (errno));
tv.tv_sec = 0;
tv.tv_usec = 20000;
select (0, NULL, NULL, NULL, &tv);
errno = 0;
if (link (newfile, EBUFFER_LOCK) == 0)
break;
if (errno != EEXIST)
fprintf (stderr, "link `%s' `%s': %s\n", newfile, EBUFFER_LOCK,
strerror (errno));
}
errno = serrno;
if (! (fp = fopen (newfile, "r"))) {
fprintf (stderr, "fopen `%s': %s\n", newfile, strerror (errno));
return;
}
unsetenv ("RC_EBUFFER");
/* Dump the file to stdout */
memset (buffer, 0, RC_LINEBUFFER);
while (fgets (buffer, RC_LINEBUFFER, fp)) {
i = strlen (buffer) - 1;
if (i < 1)
continue;
if (buffer[i] == '\n')
buffer[i] = 0;
p = buffer;
cmd = strsep (&p, " ");
token = strsep (&p, " ");
if (sscanf (token, "%d", &retval) != 1) {
fprintf (stderr, "eflush `%s': not a number", token);
continue;
}
token = strsep (&p, " ");
if (sscanf (token, "%d", &length) != 1) {
fprintf (stderr, "eflush `%s': not a number", token);
continue;
}
i = 0;
while (funcmap[i].name) {
if (strcmp (funcmap[i].name, cmd) == 0) {
if (funcmap[i].efunc) {
if (p)
funcmap[i].efunc ("%s", p);
else
funcmap[i].efunc (NULL, NULL);
} else if (funcmap[i].eefunc) {
if (p)
funcmap[i].eefunc (retval, "%s", p);
else
funcmap[i].eefunc (retval, NULL, NULL);
} else if (funcmap[i].eind)
funcmap[i].eind ();
else
fprintf (stderr, "eflush `%s': no function defined\n", cmd);
break;
}
i++;
}
if (! funcmap[i].name)
fprintf (stderr, "eflush `%s': invalid function\n", cmd);
if (fseek (ebfp, (off_t) 0, SEEK_SET) < 0)
eerror ("fseek: %s", strerror (errno));
else {
while (fgets (buffer, RC_LINEBUFFER, ebfp))
printf ("%s", buffer);
}
fclose (fp);
fflush (stdout);
fflush (stderr);
if (unlink (EBUFFER_LOCK))
fprintf (stderr, "unlink `%s': %s", EBUFFER_LOCK, strerror (errno));
eerror ("unlink `%s': %s", EBUFFER_LOCK, strerror (errno));
if (unlink (newfile))
fprintf (stderr, "unlink `%s': %s", newfile, strerror (errno));
if (reopen) {
ftruncate (fileno (ebfp), (off_t) 0);
fseek (ebfp, (off_t) 0, SEEK_SET);
dup2 (fileno (ebfp), fileno (stdout));
dup2 (fileno (ebfp), fileno (stderr));
} else {
stdfd[0] = -1;
stdfd[1] = -1;
fclose (ebfp);
ebfp = NULL;
unlink (ebfile);
ebfile[0] = '\0';
unsetenv ("RC_EBUFFER");
}
_exit (EXIT_SUCCESS);
return;
}
void eflush () {
_eflush (true);
}
hidden_def(eflush)
#define EBUFFER(_cmd, _retval, _fmt, _ap) { \
int _i = ebuffer (_cmd, _retval, _fmt, _ap); \
if (_i) \
return (_i); \
void eclose () {
_eflush (false);
}
hidden_def(eclose)
static void elog (int level, const char *fmt, va_list ap)
{
@ -401,7 +339,6 @@ static int _eindent (FILE *stream)
/* Terminate it */
memset (indent + amount, 0, 1);
return (fprintf (stream, "%s", indent));
}
@ -486,8 +423,7 @@ int einfon (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("einfon", 0, fmt, ap)))
retval = _einfovn (fmt, ap);
retval = _einfovn (fmt, ap);
va_end (ap);
return (retval);
@ -503,8 +439,7 @@ int ewarnn (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("ewarnn", 0, fmt, ap)))
retval = _ewarnvn (fmt, ap);
retval = _ewarnvn (fmt, ap);
va_end (ap);
return (retval);
@ -517,8 +452,7 @@ int eerrorn (const char *fmt, ...)
va_list ap;
va_start (ap, fmt);
if (! (retval = ebuffer ("eerrorn", 0, fmt, ap)))
retval = _eerrorvn (fmt, ap);
retval = _eerrorvn (fmt, ap);
va_end (ap);
return (retval);
@ -534,10 +468,8 @@ int einfo (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("einfo", 0, fmt, ap))) {
retval = _einfovn (fmt, ap);
retval += printf ("\n");
}
retval = _einfovn (fmt, ap);
retval += printf ("\n");
va_end (ap);
return (retval);
@ -554,10 +486,8 @@ int ewarn (const char *fmt, ...)
va_start (ap, fmt);
elog (LOG_WARNING, fmt, ap);
if (! (retval = ebuffer ("ewarn", 0, fmt, ap))) {
retval = _ewarnvn (fmt, ap);
retval += printf ("\n");
}
retval = _ewarnvn (fmt, ap);
retval += printf ("\n");
va_end (ap);
return (retval);
@ -569,6 +499,7 @@ void ewarnx (const char *fmt, ...)
int retval;
va_list ap;
eclose ();
if (fmt && ! is_env ("RC_QUIET", "yes")) {
va_start (ap, fmt);
elog (LOG_WARNING, fmt, ap);
@ -594,6 +525,7 @@ int eerror (const char *fmt, ...)
va_end (ap);
retval += fprintf (stderr, "\n");
eflush ();
return (retval);
}
hidden_def(eerror)
@ -602,6 +534,7 @@ void eerrorx (const char *fmt, ...)
{
va_list ap;
eclose ();
if (fmt) {
va_start (ap, fmt);
elog (LOG_ERR, fmt, ap);
@ -609,6 +542,7 @@ void eerrorx (const char *fmt, ...)
va_end (ap);
printf ("\n");
}
exit (EXIT_FAILURE);
}
hidden_def(eerrorx)
@ -622,11 +556,6 @@ int ebegin (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if ((retval = ebuffer ("ebegin", 0, fmt, ap))) {
va_end (ap);
return (retval);
}
retval = _einfovn (fmt, ap);
va_end (ap);
retval += printf (" ...");
@ -667,15 +596,6 @@ static int _do_eend (const char *cmd, int retval, const char *fmt, va_list ap)
int col = 0;
FILE *fp;
va_list apc;
int eb;
if (fmt) {
va_copy (apc, ap);
eb = ebuffer (cmd, retval, fmt, apc);
va_end (apc);
if (eb)
return (retval);
}
if (fmt && retval != 0) {
va_copy (apc, ap);
@ -739,9 +659,6 @@ void eindent (void)
int amount = 0;
char num[10];
if (ebuffer ("eindent", 0, NULL, NULL))
return;
if (env) {
errno = 0;
amount = strtol (env, NULL, 0);
@ -764,9 +681,6 @@ void eoutdent (void)
int amount = 0;
char num[10];
if (ebuffer ("eoutdent", 0, NULL, NULL))
return;
if (! env)
return;
@ -797,8 +711,7 @@ int einfovn (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("einfovn", 0, fmt, ap)))
retval = _einfovn (fmt, ap);
retval = _einfovn (fmt, ap);
va_end (ap);
return (retval);
@ -816,8 +729,7 @@ int ewarnvn (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("ewarnvn", 0, fmt, ap)))
retval = _ewarnvn (fmt, ap);
retval = _ewarnvn (fmt, ap);
va_end (ap);
return (retval);
@ -835,10 +747,8 @@ int einfov (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("einfov", 0, fmt, ap))) {
retval = _einfovn (fmt, ap);
retval += printf ("\n");
}
retval = _einfovn (fmt, ap);
retval += printf ("\n");
va_end (ap);
return (retval);
@ -856,10 +766,8 @@ int ewarnv (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("ewarnv", 0, fmt, ap))) {
retval = _ewarnvn (fmt, ap);
retval += printf ("\n");
}
retval = _ewarnvn (fmt, ap);
retval += printf ("\n");
va_end (ap);
return (retval);
@ -877,12 +785,10 @@ int ebeginv (const char *fmt, ...)
return (0);
va_start (ap, fmt);
if (! (retval = ebuffer ("ebeginv", 0, fmt, ap))) {
retval = _einfovn (fmt, ap);
retval += printf (" ...");
if (colour_terminal ())
retval += printf ("\n");
}
retval = _einfovn (fmt, ap);
retval += printf (" ...");
if (colour_terminal ())
retval += printf ("\n");
va_end (ap);
return (retval);

14
src/librc-misc.c
View File

@ -644,6 +644,20 @@ char **rc_config_env (char **env)
} else
env = rc_strlist_add (env, "RC_DEFAULTLEVEL=" RC_LEVEL_DEFAULT);
/* Store the name of the tty that stdout is connected to
* We do this so our init scripts can call eflush without any knowledge
* of our fd's */
if (isatty (fileno (stdout))) {
if ((p = rc_xstrdup (ttyname (fileno (stdout))))) {
i = strlen ("RC_TTY=") + strlen (p) + 1;
line = rc_xmalloc (sizeof (char *) * i);
snprintf (line, i, "RC_TTY=%s", p);
env = rc_strlist_add (env, line);
free (p);
free (line);
}
}
memset (sys, 0, sizeof (sys));
/* Linux can run some funky stuff like Xen, VServer, UML, etc

12
src/rc.c
View File

@ -462,13 +462,7 @@ static void set_ksoftlevel (const char *runlevel)
static void wait_for_services ()
{
int status = 0;
struct timeval tv;
while (wait (&status) != -1);
/* Wait for a little bit to flush our ebuffer */
tv.tv_usec = 50000;
tv.tv_sec = 0;
select (0, NULL, NULL, NULL, &tv);
}
static void add_pid (pid_t pid)
@ -1077,7 +1071,7 @@ int main (int argc, char **argv)
/* We always stop the service when in these runlevels */
if (going_down) {
pid_t pid = rc_stop_service (service);
if (pid > 0 && ! rc_is_env ("RC_PARALLEL_STARTUP", "yes"))
if (pid > 0 && ! rc_is_env ("RC_PARALLEL", "yes"))
rc_waitpid (pid);
}
@ -1141,7 +1135,7 @@ int main (int argc, char **argv)
/* After all that we can finally stop the blighter! */
if (! found) {
pid_t pid = rc_stop_service (service);
if (pid > 0 && ! rc_is_env ("RC_PARALLEL_STARTUP", "yes"))
if (pid > 0 && ! rc_is_env ("RC_PARALLEL", "yes"))
rc_waitpid (pid);
}
}
@ -1227,7 +1221,7 @@ interactive_option:
if ((pid = rc_start_service (service)))
add_pid (pid);
if (! rc_is_env ("RC_PARALLEL_STARTUP", "yes")) {
if (! rc_is_env ("RC_PARALLEL", "yes")) {
rc_waitpid (pid);
remove_pid (pid);
}

16
src/runscript.c
View File

@ -199,7 +199,7 @@ static void uncoldplug (char *service)
static void cleanup (void)
{
/* Flush our buffered output if any */
eflush ();
eclose ();
if (hook_out)
rc_plugin_run (hook_out, applet);
@ -267,6 +267,10 @@ static bool svc_exec (const char *service, const char *arg1, const char *arg2)
{
bool retval;
/* To ensure any output has hit our ebuffer */
fflush (stdout);
fflush (stderr);
/* We need to disable our child signal handler now so we block
until our script returns. */
signal (SIGCHLD, NULL);
@ -466,7 +470,7 @@ static void svc_start (const char *service, bool deps)
STRLIST_FOREACH (services, svc, i)
if (rc_service_state (svc, rc_service_stopped)) {
pid_t pid = rc_start_service (svc);
if (! rc_is_env ("RC_PARALLEL_STARTUP", "yes"))
if (! rc_is_env ("RC_PARALLEL", "yes"))
rc_waitpid (pid);
}
@ -670,7 +674,7 @@ static void svc_stop (const char *service, bool deps)
rc_service_state (svc, rc_service_inactive))
{
pid_t pid = rc_stop_service (svc);
if (! rc_is_env ("RC_PARALLEL_STARTUP", "yes"))
if (! rc_is_env ("RC_PARALLEL", "yes"))
rc_waitpid (pid);
tmplist = rc_strlist_add (tmplist, svc);
}
@ -883,7 +887,7 @@ int main (int argc, char **argv)
softlevel = rc_get_runlevel ();
/* If not called from RC or another service then don't be parallel */
unsetenv ("RC_PARALLEL_STARTUP");
unsetenv ("RC_PARALLEL");
}
setenv ("RC_ELOG", service, 1);
@ -895,13 +899,13 @@ int main (int argc, char **argv)
snprintf (pid, sizeof (pid), "%d", (int) getpid ());
setenv ("RC_RUNSCRIPT_PID", pid, 1);
if (rc_is_env ("RC_PARALLEL_STARTUP", "yes")) {
if (rc_is_env ("RC_PARALLEL", "yes")) {
char ebname[PATH_MAX];
char *eb;
snprintf (ebname, sizeof (ebname), "%s.%s", applet, pid);
eb = rc_strcatpaths (RC_SVCDIR "ebuffer", ebname, (char *) NULL);
setenv ("RC_EBUFFER", eb, 1);
ebuffer (eb);
free (eb);
}