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watchdog: add -T option

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function                                             old     new   delta
 watchdog_main                                        159     219     +60
mdev: support match by major,minor. See bug 4714.
 +100 bytes.
This commit is contained in:
Denis Vlasenko 2008-09-07 23:22:08 +00:00
parent ee9deb863e
commit 8d89bed840
7 changed files with 81 additions and 66 deletions
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2
debianutils/start_stop_daemon.c
View File

@ -428,7 +428,7 @@ int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
write_pidfile(pidfile);
}
if (opt & OPT_c) {
struct bb_uidgid_t ugid;
struct bb_uidgid_t ugid = { -1, -1 };
parse_chown_usergroup_or_die(&ugid, chuid);
if (ugid.gid != (gid_t) -1) xsetgid(ugid.gid);
if (ugid.uid != (uid_t) -1) xsetuid(ugid.uid);

6
docs/mdev.txt
View File

@ -51,9 +51,11 @@ device nodes if your system needs something more than the default root/root
660 permissions.
The file has the format:
<device regex> <uid>:<gid> <octal permissions>
<device regex> <uid>:<gid> <octal permissions>
or @<maj[,min1[-min2]]> <uid>:<gid> <octal permissions>
For example:
hd[a-z][0-9]* 0:3 660
hd[a-z][0-9]* 0:3 660
The config file parsing stops at the first matching line. If no line is
matched, then the default of 0:0 660 is used. To set your own default, simply

7
include/usage.h
View File

@ -4561,14 +4561,15 @@
"Mon Dec 17 10:31:44 GMT 2000"
#define watchdog_trivial_usage \
"[-t N[ms]] [-F] DEV"
"[-t N[ms]] [-T N[ms]] [-F] DEV"
#define watchdog_full_usage "\n\n" \
"Periodically write to watchdog device DEV\n" \
"\nOptions:" \
"\n -t N Timer period (default 30)" \
"\n -T N Reboot after N seconds if not reset (default 60)" \
"\n -t N Reset every N seconds (default 30)" \
"\n -F Run in foreground" \
"\n" \
"\nUse -t 500ms to specify period in milliseconds" \
"\nUse 500ms to specify period in milliseconds" \
#define wc_trivial_usage \
"[OPTION]... [FILE]..."

5
libpwdgrp/uidgid_get.c
View File

@ -87,15 +87,12 @@ void FAST_FUNC xget_uidgid(struct bb_uidgid_t *u, const char *ug)
* ":group" sets gid only
* "user:" sets uid and gid (to user's primary group id)
* "user:group" sets uid and gid
* ('unset' uid or gid is actually set to -1)
* ('unset' uid or gid retains the value it has on entry)
*/
void FAST_FUNC parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group)
{
char *group;
u->uid = -1;
u->gid = -1;
/* Check if there is a group name */
group = strchr(user_group, '.'); /* deprecated? */
if (!group)

59
miscutils/watchdog.c
View File

@ -4,14 +4,17 @@
*
* Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
* Copyright (C) 2006 Bernhard Fischer <busybox@busybox.net>
* Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
#include "libbb.h"
#include "linux/watchdog.h"
#define OPT_FOREGROUND 0x01
#define OPT_TIMER 0x02
#define OPT_FOREGROUND (1 << 0)
#define OPT_STIMER (1 << 1)
#define OPT_HTIMER (1 << 2)
static void watchdog_shutdown(int sig UNUSED_PARAM)
{
@ -26,38 +29,42 @@ static void watchdog_shutdown(int sig UNUSED_PARAM)
int watchdog_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int watchdog_main(int argc, char **argv)
{
static const struct suffix_mult suffixes[] = {
{ "ms", 1 },
{ "", 1000 },
{ }
};
unsigned opts;
unsigned timer_duration = 30000; /* Userspace timer duration, in milliseconds */
char *t_arg;
unsigned stimer_duration; /* how often to restart */
unsigned htimer_duration = 60000; /* reboots after N ms if not restarted */
char *st_arg;
char *ht_arg;
opt_complementary = "=1"; /* must have 1 argument */
opts = getopt32(argv, "Ft:", &t_arg);
opt_complementary = "=1"; /* must have exactly 1 argument */
opts = getopt32(argv, "Ft:T:", &st_arg, &ht_arg);
if (opts & OPT_TIMER) {
static const struct suffix_mult suffixes[] = {
{ "ms", 1 },
{ "", 1000 },
{ }
};
timer_duration = xatou_sfx(t_arg, suffixes);
}
if (!(opts & OPT_FOREGROUND)) {
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
if (opts & OPT_HTIMER)
htimer_duration = xatou_sfx(ht_arg, suffixes);
stimer_duration = htimer_duration / 2;
if (opts & OPT_STIMER)
stimer_duration = xatou_sfx(st_arg, suffixes);
bb_signals(BB_FATAL_SIGS, watchdog_shutdown);
/* Use known fd # - avoid needing global 'int fd' */
xmove_fd(xopen(argv[argc - 1], O_WRONLY), 3);
// TODO?
// if (!(opts & OPT_TIMER)) {
// if (ioctl(fd, WDIOC_GETTIMEOUT, &timer_duration) == 0)
// timer_duration *= 500;
// else
// timer_duration = 30000;
// }
ioctl_or_warn(3, WDIOC_SETTIMEOUT, &htimer_duration);
#if 0
ioctl_or_warn(3, WDIOC_GETTIMEOUT, &htimer_duration);
printf("watchdog: SW timer is %dms, HW timer is %dms\n",
stimer_duration, htimer_duration * 1000);
#endif
if (!(opts & OPT_FOREGROUND)) {
bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
}
while (1) {
/*
@ -65,7 +72,7 @@ int watchdog_main(int argc, char **argv)
* is undefined at this point -- PFM
*/
write(3, "", 1); /* write zero byte */
usleep(timer_duration * 1000L);
usleep(stimer_duration * 1000L);
}
return EXIT_SUCCESS; /* - not reached, but gcc 4.2.1 is too dumb! */
}

13
testsuite/mdev.tests
View File

@ -98,7 +98,6 @@ brw-r--r-- 1 0 0 a_sda
# continuing to use directory structure from prev test
rm -rf mdev.testdir/dev/*
# here we complicate things by having non-matching group 1 and using %0
echo "sda 0:0 644 @echo @echo TEST" >mdev.testdir/etc/mdev.conf
testing "mdev command" \
"env - PATH=$PATH ACTION=add DEVPATH=/block/sda chroot mdev.testdir /mdev 2>&1;
@ -110,6 +109,18 @@ brw-r--r-- 1 0 0 8,0 sda
" \
"" ""
# continuing to use directory structure from prev test
rm -rf mdev.testdir/dev/*
echo "@8,0 :1 644" >mdev.testdir/etc/mdev.conf
testing "mdev #maj,min and no explicit uid" \
"env - PATH=$PATH ACTION=add DEVPATH=/block/sda chroot mdev.testdir /mdev 2>&1;
ls -lnR mdev.testdir/dev | $FILTER_LS" \
"\
mdev.testdir/dev:
brw-r--r-- 1 0 1 8,0 sda
" \
"" ""
# clean up
rm -rf mdev.testdir

55
util-linux/mdev.c
View File

@ -59,8 +59,7 @@ static void make_device(char *path, int delete)
int major, minor, type, len;
int mode = 0660;
#if ENABLE_FEATURE_MDEV_CONF
uid_t uid = 0;
gid_t gid = 0;
struct bb_uidgid_t ugid = { 0, 0 };
parser_t *parser;
char *tokens[5];
#endif
@ -78,9 +77,10 @@ static void make_device(char *path, int delete)
/* Try to read major/minor string. Note that the kernel puts \n after
* the data, so we don't need to worry about null terminating the string
* because sscanf() will stop at the first nondigit, which \n is. We
* also depend on path having writeable space after it.
* because sscanf() will stop at the first nondigit, which \n is.
* We also depend on path having writeable space after it.
*/
major = -1;
if (!delete) {
strcpy(dev_maj_min, "/dev");
len = open_read_close(path, dev_maj_min + 1, 64);
@ -90,6 +90,8 @@ static void make_device(char *path, int delete)
return;
/* no "dev" file, so just try to run script */
*dev_maj_min = '\0';
} else if (sscanf(dev_maj_min, "%u:%u", &major, &minor) != 2) {
major = -1;
}
}
@ -113,8 +115,23 @@ static void make_device(char *path, int delete)
/* Fields: regex uid:gid mode [alias] [cmd] */
/* 1st field: regex to match this device */
{
/* 1st field: @<numeric maj,min>... */
if (tokens[0][0] == '@') {
/* @major,minor[-last] */
/* (useful when name is ambiguous:
* "/sys/class/usb/lp0" and
* "/sys/class/printer/lp0") */
int cmaj, cmin0, cmin1, sc;
if (major < 0)
continue; /* no dev, no match */
sc = sscanf(tokens[0], "@%u,%u-%u", &cmaj, &cmin0, &cmin1);
if (sc < 1 || major != cmaj
|| (sc == 2 && minor != cmin0)
|| (sc == 3 && (minor < cmin0 || minor > cmin1))
) {
continue; /* no match */
}
} else { /* ... or regex to match device name */
regex_t match;
int result;
@ -144,27 +161,7 @@ static void make_device(char *path, int delete)
* after parsing the rest of fields */
/* 2nd field: uid:gid - device ownership */
{
struct passwd *pass;
struct group *grp;
char *str_uid = tokens[1];
char *str_gid = strchrnul(str_uid, ':');
if (*str_gid)
*str_gid++ = '\0';
/* Parse UID */
pass = getpwnam(str_uid);
if (pass)
uid = pass->pw_uid;
else
uid = strtoul(str_uid, NULL, 10);
/* Parse GID */
grp = getgrnam(str_gid);
if (grp)
gid = grp->gr_gid;
else
gid = strtoul(str_gid, NULL, 10);
}
parse_chown_usergroup_or_die(&ugid, tokens[1]);
/* 3rd field: mode - device permissions */
mode = strtoul(tokens[2], NULL, 8);
@ -243,7 +240,7 @@ static void make_device(char *path, int delete)
config_close(parser);
#endif /* ENABLE_FEATURE_MDEV_CONF */
if (!delete && sscanf(dev_maj_min, "%u:%u", &major, &minor) == 2) {
if (!delete && major >= 0) {
if (ENABLE_FEATURE_MDEV_RENAME)
unlink(device_name);
@ -255,7 +252,7 @@ static void make_device(char *path, int delete)
symlink(device_name, "root");
#if ENABLE_FEATURE_MDEV_CONF
chown(device_name, uid, gid);
chown(device_name, ugid.uid, ugid.gid);
#if ENABLE_FEATURE_MDEV_RENAME
if (alias) {