summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDenys Vlasenko <vda.linux@googlemail.com>2013-06-29 15:00:22 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2013-06-29 15:00:22 (GMT)
commite73f3c1d3d83699b723251f7e6a981021ce75475 (patch)
treee0272460fb0dbbe33412a09534c088634fd3ed24
parent64406a92a054f884747553011d4529103e2900e4 (diff)
downloadbusybox-refs/tags/1_21_1.tar.gz
busybox-refs/tags/1_21_1.tar.bz2
Apply post-1.21.0 patches, bump version to 1.21.11_21_11_21_stable
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--Makefile2
-rw-r--r--archival/libarchive/decompress_unxz.c47
-rw-r--r--include/platform.h2
-rw-r--r--util-linux/mdev.c402
-rw-r--r--util-linux/volume_id/ntfs.c2
5 files changed, 341 insertions, 114 deletions
diff --git a/Makefile b/Makefile
index c31ca89..ca06442 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
VERSION = 1
PATCHLEVEL = 21
-SUBLEVEL = 0
+SUBLEVEL = 1
EXTRAVERSION =
NAME = Unnamed
diff --git a/archival/libarchive/decompress_unxz.c b/archival/libarchive/decompress_unxz.c
index 79b48a1..986b7b1 100644
--- a/archival/libarchive/decompress_unxz.c
+++ b/archival/libarchive/decompress_unxz.c
@@ -30,8 +30,8 @@ static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
/* We use arch-optimized unaligned accessors */
#define get_unaligned_le32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_LE32(v); })
#define get_unaligned_be32(buf) ({ uint32_t v; move_from_unaligned32(v, buf); SWAP_BE32(v); })
-#define put_unaligned_le32(val, buf) move_to_unaligned16(buf, SWAP_LE32(val))
-#define put_unaligned_be32(val, buf) move_to_unaligned16(buf, SWAP_BE32(val))
+#define put_unaligned_le32(val, buf) move_to_unaligned32(buf, SWAP_LE32(val))
+#define put_unaligned_be32(val, buf) move_to_unaligned32(buf, SWAP_BE32(val))
#include "unxz/xz_dec_bcj.c"
#include "unxz/xz_dec_lzma2.c"
@@ -40,6 +40,7 @@ static uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc)
IF_DESKTOP(long long) int FAST_FUNC
unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
{
+ enum xz_ret xz_result;
struct xz_buf iobuf;
struct xz_dec *state;
unsigned char *membuf;
@@ -63,9 +64,8 @@ unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
/* Limit memory usage to about 64 MiB. */
state = xz_dec_init(XZ_DYNALLOC, 64*1024*1024);
+ xz_result = X_OK;
while (1) {
- enum xz_ret r;
-
if (iobuf.in_pos == iobuf.in_size) {
int rd = safe_read(src_fd, membuf, BUFSIZ);
if (rd < 0) {
@@ -73,28 +73,57 @@ unpack_xz_stream(transformer_aux_data_t *aux, int src_fd, int dst_fd)
total = -1;
break;
}
+ if (rd == 0 && xz_result == XZ_STREAM_END)
+ break;
iobuf.in_size = rd;
iobuf.in_pos = 0;
}
+ if (xz_result == XZ_STREAM_END) {
+ /*
+ * Try to start decoding next concatenated stream.
+ * Stream padding must always be a multiple of four
+ * bytes to preserve four-byte alignment. To keep the
+ * code slightly smaller, we aren't as strict here as
+ * the .xz spec requires. We just skip all zero-bytes
+ * without checking the alignment and thus can accept
+ * files that aren't valid, e.g. the XZ utils test
+ * files bad-0pad-empty.xz and bad-0catpad-empty.xz.
+ */
+ do {
+ if (membuf[iobuf.in_pos] != 0) {
+ xz_dec_reset(state);
+ goto do_run;
+ }
+ iobuf.in_pos++;
+ } while (iobuf.in_pos < iobuf.in_size);
+ }
+ do_run:
// bb_error_msg(">in pos:%d size:%d out pos:%d size:%d",
// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size);
- r = xz_dec_run(state, &iobuf);
+ xz_result = xz_dec_run(state, &iobuf);
// bb_error_msg("<in pos:%d size:%d out pos:%d size:%d r:%d",
-// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, r);
+// iobuf.in_pos, iobuf.in_size, iobuf.out_pos, iobuf.out_size, xz_result);
if (iobuf.out_pos) {
xwrite(dst_fd, iobuf.out, iobuf.out_pos);
IF_DESKTOP(total += iobuf.out_pos;)
iobuf.out_pos = 0;
}
- if (r == XZ_STREAM_END) {
- break;
+ if (xz_result == XZ_STREAM_END) {
+ /*
+ * Can just "break;" here, if not for concatenated
+ * .xz streams.
+ * Checking for padding may require buffer
+ * replenishment. Can't do it here.
+ */
+ continue;
}
- if (r != XZ_OK && r != XZ_UNSUPPORTED_CHECK) {
+ if (xz_result != XZ_OK && xz_result != XZ_UNSUPPORTED_CHECK) {
bb_error_msg("corrupted data");
total = -1;
break;
}
}
+
xz_dec_end(state);
free(membuf);
diff --git a/include/platform.h b/include/platform.h
index 1282306..f4deb30 100644
--- a/include/platform.h
+++ b/include/platform.h
@@ -228,7 +228,7 @@ typedef uint32_t bb__aliased_uint32_t FIX_ALIASING;
# define move_from_unaligned32(v, u32p) (memcpy(&(v), (u32p), 4))
# define move_to_unaligned16(u16p, v) do { \
uint16_t __t = (v); \
- memcpy((u16p), &__t, 4); \
+ memcpy((u16p), &__t, 2); \
} while (0)
# define move_to_unaligned32(u32p, v) do { \
uint32_t __t = (v); \
diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 75de14f..3d4e135 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -80,7 +80,7 @@
//usage: IF_FEATURE_MDEV_CONF(
//usage: "\n"
//usage: "It uses /etc/mdev.conf with lines\n"
-//usage: " [-]DEVNAME UID:GID PERM"
+//usage: " [-][ENV=regex;]...DEVNAME UID:GID PERM"
//usage: IF_FEATURE_MDEV_RENAME(" [>|=PATH]|[!]")
//usage: IF_FEATURE_MDEV_EXEC(" [@|$|*PROG]")
//usage: "\n"
@@ -230,9 +230,34 @@
* SUBSYSTEM=block
*/
-static const char keywords[] ALIGN1 = "add\0remove\0change\0";
+#define DEBUG_LVL 2
+
+#if DEBUG_LVL >= 1
+# define dbg1(...) do { if (G.verbose) bb_error_msg(__VA_ARGS__); } while(0)
+#else
+# define dbg1(...) ((void)0)
+#endif
+#if DEBUG_LVL >= 2
+# define dbg2(...) do { if (G.verbose >= 2) bb_error_msg(__VA_ARGS__); } while(0)
+#else
+# define dbg2(...) ((void)0)
+#endif
+#if DEBUG_LVL >= 3
+# define dbg3(...) do { if (G.verbose >= 3) bb_error_msg(__VA_ARGS__); } while(0)
+#else
+# define dbg3(...) ((void)0)
+#endif
+
+
+static const char keywords[] ALIGN1 = "add\0remove\0"; // "change\0"
enum { OP_add, OP_remove };
+struct envmatch {
+ struct envmatch *next;
+ char *envname;
+ regex_t match;
+};
+
struct rule {
bool keep_matching;
bool regex_compiled;
@@ -243,12 +268,14 @@ struct rule {
char *ren_mov;
IF_FEATURE_MDEV_EXEC(char *r_cmd;)
regex_t match;
+ struct envmatch *envmatch;
};
struct globals {
int root_major, root_minor;
smallint verbose;
char *subsystem;
+ char *subsys_env; /* for putenv("SUBSYSTEM=subsystem") */
#if ENABLE_FEATURE_MDEV_CONF
const char *filename;
parser_t *parser;
@@ -256,6 +283,7 @@ struct globals {
unsigned rule_idx;
#endif
struct rule cur_rule;
+ char timestr[sizeof("60.123456")];
} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
#define INIT_G() do { \
@@ -267,15 +295,8 @@ struct globals {
/* Prevent infinite loops in /sys symlinks */
#define MAX_SYSFS_DEPTH 3
-/* We use additional 64+ bytes in make_device() */
-#define SCRATCH_SIZE 80
-
-#if 0
-# define dbg(...) bb_error_msg(__VA_ARGS__)
-#else
-# define dbg(...) ((void)0)
-#endif
-
+/* We use additional bytes in make_device() */
+#define SCRATCH_SIZE 128
#if ENABLE_FEATURE_MDEV_CONF
@@ -288,14 +309,65 @@ static void make_default_cur_rule(void)
static void clean_up_cur_rule(void)
{
+ struct envmatch *e;
+
free(G.cur_rule.envvar);
+ free(G.cur_rule.ren_mov);
if (G.cur_rule.regex_compiled)
regfree(&G.cur_rule.match);
- free(G.cur_rule.ren_mov);
IF_FEATURE_MDEV_EXEC(free(G.cur_rule.r_cmd);)
+ e = G.cur_rule.envmatch;
+ while (e) {
+ free(e->envname);
+ regfree(&e->match);
+ e = e->next;
+ }
make_default_cur_rule();
}
+/* In later versions, endofname is in libbb */
+#define endofname mdev_endofname
+static
+const char* FAST_FUNC
+endofname(const char *name)
+{
+#define is_name(c) ((c) == '_' || isalpha((unsigned char)(c)))
+#define is_in_name(c) ((c) == '_' || isalnum((unsigned char)(c)))
+ if (!is_name(*name))
+ return name;
+ while (*++name) {
+ if (!is_in_name(*name))
+ break;
+ }
+ return name;
+}
+
+static char *parse_envmatch_pfx(char *val)
+{
+ struct envmatch **nextp = &G.cur_rule.envmatch;
+
+ for (;;) {
+ struct envmatch *e;
+ char *semicolon;
+ char *eq = strchr(val, '=');
+ if (!eq /* || eq == val? */)
+ return val;
+ if (endofname(val) != eq)
+ return val;
+ semicolon = strchr(eq, ';');
+ if (!semicolon)
+ return val;
+ /* ENVVAR=regex;... */
+ *nextp = e = xzalloc(sizeof(*e));
+ nextp = &e->next;
+ e->envname = xstrndup(val, eq - val);
+ *semicolon = '\0';
+ xregcomp(&e->match, eq + 1, REG_EXTENDED);
+ *semicolon = ';';
+ val = semicolon + 1;
+ }
+}
+
static void parse_next_rule(void)
{
/* Note: on entry, G.cur_rule is set to default */
@@ -308,12 +380,13 @@ static void parse_next_rule(void)
break;
/* Fields: [-]regex uid:gid mode [alias] [cmd] */
- dbg("token1:'%s'", tokens[1]);
+ dbg3("token1:'%s'", tokens[1]);
/* 1st field */
val = tokens[0];
G.cur_rule.keep_matching = ('-' == val[0]);
val += G.cur_rule.keep_matching; /* swallow leading dash */
+ val = parse_envmatch_pfx(val);
if (val[0] == '@') {
/* @major,minor[-minor2] */
/* (useful when name is ambiguous:
@@ -328,8 +401,10 @@ static void parse_next_rule(void)
if (sc == 2)
G.cur_rule.min1 = G.cur_rule.min0;
} else {
+ char *eq = strchr(val, '=');
if (val[0] == '$') {
- char *eq = strchr(++val, '=');
+ /* $ENVVAR=regex ... */
+ val++;
if (!eq) {
bb_error_msg("bad $envvar=regex on line %d", G.parser->lineno);
goto next_rule;
@@ -373,7 +448,7 @@ static void parse_next_rule(void)
clean_up_cur_rule();
} /* while (config_read) */
- dbg("config_close(G.parser)");
+ dbg3("config_close(G.parser)");
config_close(G.parser);
G.parser = NULL;
@@ -390,7 +465,7 @@ static const struct rule *next_rule(void)
/* Open conf file if we didn't do it yet */
if (!G.parser && G.filename) {
- dbg("config_open('%s')", G.filename);
+ dbg3("config_open('%s')", G.filename);
G.parser = config_open2(G.filename, fopen_for_read);
G.filename = NULL;
}
@@ -399,7 +474,7 @@ static const struct rule *next_rule(void)
/* mdev -s */
/* Do we have rule parsed already? */
if (G.rule_vec[G.rule_idx]) {
- dbg("< G.rule_vec[G.rule_idx:%d]=%p", G.rule_idx, G.rule_vec[G.rule_idx]);
+ dbg3("< G.rule_vec[G.rule_idx:%d]=%p", G.rule_idx, G.rule_vec[G.rule_idx]);
return G.rule_vec[G.rule_idx++];
}
make_default_cur_rule();
@@ -416,13 +491,28 @@ static const struct rule *next_rule(void)
rule = memcpy(xmalloc(sizeof(G.cur_rule)), &G.cur_rule, sizeof(G.cur_rule));
G.rule_vec = xrealloc_vector(G.rule_vec, 4, G.rule_idx);
G.rule_vec[G.rule_idx++] = rule;
- dbg("> G.rule_vec[G.rule_idx:%d]=%p", G.rule_idx, G.rule_vec[G.rule_idx]);
+ dbg3("> G.rule_vec[G.rule_idx:%d]=%p", G.rule_idx, G.rule_vec[G.rule_idx]);
}
}
return rule;
}
+static int env_matches(struct envmatch *e)
+{
+ while (e) {
+ int r;
+ char *val = getenv(e->envname);
+ if (!val)
+ return 0;
+ r = regexec(&e->match, val, /*size*/ 0, /*range[]*/ NULL, /*eflags*/ 0);
+ if (r != 0) /* no match */
+ return 0;
+ e = e->next;
+ }
+ return 1;
+}
+
#else
# define next_rule() (&G.cur_rule)
@@ -468,7 +558,7 @@ static char *build_alias(char *alias, const char *device_name)
/* mknod in /dev based on a path like "/sys/block/hda/hda1"
* NB1: path parameter needs to have SCRATCH_SIZE scratch bytes
- * after NUL, but we promise to not mangle (IOW: to restore if needed)
+ * after NUL, but we promise to not mangle (IOW: to restore NUL if needed)
* path string.
* NB2: "mdev -s" may call us many times, do not leak memory/fds!
*
@@ -478,9 +568,7 @@ static char *build_alias(char *alias, const char *device_name)
static void make_device(char *device_name, char *path, int operation)
{
int major, minor, type, len;
-
- if (G.verbose)
- bb_error_msg("device: %s, %s", device_name, path);
+ char *path_end = path + strlen(path);
/* 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
@@ -489,29 +577,51 @@ static void make_device(char *device_name, char *path, int operation)
*/
major = -1;
if (operation == OP_add) {
- char *dev_maj_min = path + strlen(path);
-
- strcpy(dev_maj_min, "/dev");
- len = open_read_close(path, dev_maj_min + 1, 64);
- *dev_maj_min = '\0';
+ strcpy(path_end, "/dev");
+ len = open_read_close(path, path_end + 1, SCRATCH_SIZE - 1);
+ *path_end = '\0';
if (len < 1) {
if (!ENABLE_FEATURE_MDEV_EXEC)
return;
/* no "dev" file, but we can still run scripts
* based on device name */
- } else if (sscanf(++dev_maj_min, "%u:%u", &major, &minor) == 2) {
- if (G.verbose)
- bb_error_msg("maj,min: %u,%u", major, minor);
+ } else if (sscanf(path_end + 1, "%u:%u", &major, &minor) == 2) {
+ dbg1("dev %u,%u", major, minor);
} else {
major = -1;
}
}
/* else: for delete, -1 still deletes the node, but < -1 suppresses that */
- /* Determine device name, type, major and minor */
- if (!device_name)
- device_name = (char*) bb_basename(path);
- /* http://kernel.org/doc/pending/hotplug.txt says that only
+ /* Determine device name */
+ if (!device_name) {
+ /*
+ * There was no $DEVNAME envvar (for example, mdev -s never has).
+ * But it is very useful: it contains the *path*, not only basename,
+ * Thankfully, uevent file has it.
+ * Example of .../sound/card0/controlC0/uevent file on Linux-3.7.7:
+ * MAJOR=116
+ * MINOR=7
+ * DEVNAME=snd/controlC0
+ */
+ strcpy(path_end, "/uevent");
+ len = open_read_close(path, path_end + 1, SCRATCH_SIZE - 1);
+ if (len < 0)
+ len = 0;
+ *path_end = '\0';
+ path_end[1 + len] = '\0';
+ device_name = strstr(path_end + 1, "\nDEVNAME=");
+ if (device_name) {
+ device_name += sizeof("\nDEVNAME=")-1;
+ strchrnul(device_name, '\n')[0] = '\0';
+ } else {
+ /* Fall back to just basename */
+ device_name = (char*) bb_basename(path);
+ }
+ }
+ /* Determine device type */
+ /*
+ * http://kernel.org/doc/pending/hotplug.txt says that only
* "/sys/block/..." is for block devices. "/sys/bus" etc is not.
* But since 2.6.25 block devices are also in /sys/class/block.
* We use strstr("/block/") to forestall future surprises.
@@ -537,6 +647,8 @@ static void make_device(char *device_name, char *path, int operation)
rule = next_rule();
#if ENABLE_FEATURE_MDEV_CONF
+ if (!env_matches(rule->envmatch))
+ continue;
if (rule->maj >= 0) { /* @maj,min rule */
if (major != rule->maj)
continue;
@@ -547,7 +659,7 @@ static void make_device(char *device_name, char *path, int operation)
}
if (rule->envvar) { /* $envvar=regex rule */
str_to_match = getenv(rule->envvar);
- dbg("getenv('%s'):'%s'", rule->envvar, str_to_match);
+ dbg3("getenv('%s'):'%s'", rule->envvar, str_to_match);
if (!str_to_match)
continue;
}
@@ -555,7 +667,7 @@ static void make_device(char *device_name, char *path, int operation)
if (rule->regex_compiled) {
int regex_match = regexec(&rule->match, str_to_match, ARRAY_SIZE(off), off, 0);
- dbg("regex_match for '%s':%d", str_to_match, regex_match);
+ dbg3("regex_match for '%s':%d", str_to_match, regex_match);
//bb_error_msg("matches:");
//for (int i = 0; i < ARRAY_SIZE(off); i++) {
// if (off[i].rm_so < 0) continue;
@@ -574,9 +686,8 @@ static void make_device(char *device_name, char *path, int operation)
}
/* else: it's final implicit "match-all" rule */
rule_matches:
+ dbg2("rule matched, line %d", G.parser ? G.parser->lineno : -1);
#endif
- dbg("rule matched");
-
/* Build alias name */
alias = NULL;
if (ENABLE_FEATURE_MDEV_RENAME && rule->ren_mov) {
@@ -619,34 +730,30 @@ static void make_device(char *device_name, char *path, int operation)
}
}
}
- dbg("alias:'%s'", alias);
+ dbg3("alias:'%s'", alias);
command = NULL;
IF_FEATURE_MDEV_EXEC(command = rule->r_cmd;)
if (command) {
- const char *s = "$@*";
- const char *s2 = strchr(s, command[0]);
-
/* Are we running this command now?
- * Run $cmd on delete, @cmd on create, *cmd on both
+ * Run @cmd on create, $cmd on delete, *cmd on any
*/
- if (s2 - s != (operation == OP_remove) || *s2 == '*') {
- /* We are here if: '*',
- * or: '@' and delete = 0,
- * or: '$' and delete = 1
- */
+ if ((command[0] == '@' && operation == OP_add)
+ || (command[0] == '$' && operation == OP_remove)
+ || (command[0] == '*')
+ ) {
command++;
} else {
command = NULL;
}
}
- dbg("command:'%s'", command);
+ dbg3("command:'%s'", command);
/* "Execute" the line we found */
node_name = device_name;
if (ENABLE_FEATURE_MDEV_RENAME && alias) {
node_name = alias = build_alias(alias, device_name);
- dbg("alias2:'%s'", alias);
+ dbg3("alias2:'%s'", alias);
}
if (operation == OP_add && major >= 0) {
@@ -656,8 +763,17 @@ static void make_device(char *device_name, char *path, int operation)
mkdir_recursive(node_name);
*slash = '/';
}
- if (G.verbose)
- bb_error_msg("mknod: %s (%d,%d) %o", node_name, major, minor, rule->mode | type);
+ if (ENABLE_FEATURE_MDEV_CONF) {
+ dbg1("mknod %s (%d,%d) %o"
+ " %u:%u",
+ node_name, major, minor, rule->mode | type,
+ rule->ugid.uid, rule->ugid.gid
+ );
+ } else {
+ dbg1("mknod %s (%d,%d) %o",
+ node_name, major, minor, rule->mode | type
+ );
+ }
if (mknod(node_name, rule->mode | type, makedev(major, minor)) && errno != EEXIST)
bb_perror_msg("can't create '%s'", node_name);
if (ENABLE_FEATURE_MDEV_CONF) {
@@ -671,8 +787,7 @@ static void make_device(char *device_name, char *path, int operation)
//TODO: on devtmpfs, device_name already exists and symlink() fails.
//End result is that instead of symlink, we have two nodes.
//What should be done?
- if (G.verbose)
- bb_error_msg("symlink: %s", device_name);
+ dbg1("symlink: %s", device_name);
symlink(node_name, device_name);
}
}
@@ -681,27 +796,21 @@ static void make_device(char *device_name, char *path, int operation)
if (ENABLE_FEATURE_MDEV_EXEC && command) {
/* setenv will leak memory, use putenv/unsetenv/free */
char *s = xasprintf("%s=%s", "MDEV", node_name);
- char *s1 = xasprintf("%s=%s", "SUBSYSTEM", G.subsystem);
putenv(s);
- putenv(s1);
- if (G.verbose)
- bb_error_msg("running: %s", command);
+ dbg1("running: %s", command);
if (system(command) == -1)
bb_perror_msg("can't run '%s'", command);
- bb_unsetenv_and_free(s1);
bb_unsetenv_and_free(s);
}
if (operation == OP_remove && major >= -1) {
if (ENABLE_FEATURE_MDEV_RENAME && alias) {
if (aliaslink == '>') {
- if (G.verbose)
- bb_error_msg("unlink: %s", device_name);
+ dbg1("unlink: %s", device_name);
unlink(device_name);
}
}
- if (G.verbose)
- bb_error_msg("unlink: %s", node_name);
+ dbg1("unlink: %s", node_name);
unlink(node_name);
}
@@ -746,9 +855,16 @@ static int FAST_FUNC dirAction(const char *fileName UNUSED_PARAM,
* under /sys/class/ */
if (1 == depth) {
free(G.subsystem);
+ if (G.subsys_env) {
+ bb_unsetenv_and_free(G.subsys_env);
+ G.subsys_env = NULL;
+ }
G.subsystem = strrchr(fileName, '/');
- if (G.subsystem)
+ if (G.subsystem) {
G.subsystem = xstrdup(G.subsystem + 1);
+ G.subsys_env = xasprintf("%s=%s", "SUBSYSTEM", G.subsystem);
+ putenv(G.subsys_env);
+ }
}
return (depth >= MAX_SYSFS_DEPTH ? SKIP : TRUE);
@@ -813,12 +929,107 @@ static void load_firmware(const char *firmware, const char *sysfs_path)
full_write(loading_fd, "-1", 2);
out:
+ xchdir("/dev");
if (ENABLE_FEATURE_CLEAN_UP) {
close(firmware_fd);
close(loading_fd);
}
}
+static char *curtime(void)
+{
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ sprintf(G.timestr, "%u.%06u", (unsigned)tv.tv_sec % 60, (unsigned)tv.tv_usec);
+ return G.timestr;
+}
+
+static void open_mdev_log(const char *seq, unsigned my_pid)
+{
+ int logfd = open("mdev.log", O_WRONLY | O_APPEND);
+ if (logfd >= 0) {
+ xmove_fd(logfd, STDERR_FILENO);
+ G.verbose = 2;
+ applet_name = xasprintf("%s[%s]", applet_name, seq ? seq : utoa(my_pid));
+ }
+}
+
+/* If it exists, does /dev/mdev.seq match $SEQNUM?
+ * If it does not match, earlier mdev is running
+ * in parallel, and we need to wait.
+ * Active mdev pokes us with SIGCHLD to check the new file.
+ */
+static int
+wait_for_seqfile(const char *seq)
+{
+ /* We time out after 2 sec */
+ static const struct timespec ts = { 0, 32*1000*1000 };
+ int timeout = 2000 / 32;
+ int seq_fd = -1;
+ int do_once = 1;
+ sigset_t set_CHLD;
+
+ sigemptyset(&set_CHLD);
+ sigaddset(&set_CHLD, SIGCHLD);
+ sigprocmask(SIG_BLOCK, &set_CHLD, NULL);
+
+ for (;;) {
+ int seqlen;
+ char seqbuf[sizeof(int)*3 + 2];
+
+ if (seq_fd < 0) {
+ seq_fd = open("mdev.seq", O_RDWR);
+ if (seq_fd < 0)
+ break;
+ }
+ seqlen = pread(seq_fd, seqbuf, sizeof(seqbuf) - 1, 0);
+ if (seqlen < 0) {
+ close(seq_fd);
+ seq_fd = -1;
+ break;
+ }
+ seqbuf[seqlen] = '\0';
+ if (seqbuf[0] == '\n') {
+ /* seed file: write out seq ASAP */
+ xwrite_str(seq_fd, seq);
+ xlseek(seq_fd, 0, SEEK_SET);
+ dbg2("first seq written");
+ break;
+ }
+ if (strcmp(seq, seqbuf) == 0) {
+ /* correct idx */
+ break;
+ }
+ if (do_once) {
+ dbg2("%s waiting for '%s'", curtime(), seqbuf);
+ do_once = 0;
+ }
+ if (sigtimedwait(&set_CHLD, NULL, &ts) >= 0) {
+ dbg3("woken up");
+ continue; /* don't decrement timeout! */
+ }
+ if (--timeout == 0) {
+ dbg1("%s waiting for '%s'", "timed out", seqbuf);
+ break;
+ }
+ }
+ sigprocmask(SIG_UNBLOCK, &set_CHLD, NULL);
+ return seq_fd;
+}
+
+static void signal_mdevs(unsigned my_pid)
+{
+ procps_status_t* p = NULL;
+ while ((p = procps_scan(p, PSSCAN_ARGV0)) != NULL) {
+ if (p->pid != my_pid
+ && p->argv0
+ && strcmp(bb_basename(p->argv0), "mdev") == 0
+ ) {
+ kill(p->pid, SIGCHLD);
+ }
+ }
+}
+
int mdev_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int mdev_main(int argc UNUSED_PARAM, char **argv)
{
@@ -840,8 +1051,8 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
xchdir("/dev");
if (argv[1] && strcmp(argv[1], "-s") == 0) {
- /* Scan:
- * mdev -s
+ /*
+ * Scan: mdev -s
*/
struct stat st;
@@ -853,6 +1064,8 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
G.root_major = major(st.st_dev);
G.root_minor = minor(st.st_dev);
+ putenv((char*)"ACTION=add");
+
/* ACTION_FOLLOWLINKS is needed since in newer kernels
* /sys/block/loop* (for example) are symlinks to dirs,
* not real directories.
@@ -878,11 +1091,13 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
char *action;
char *env_devname;
char *env_devpath;
+ unsigned my_pid;
+ int seq_fd;
smalluint op;
/* Hotplug:
* env ACTION=... DEVPATH=... SUBSYSTEM=... [SEQNUM=...] mdev
- * ACTION can be "add" or "remove"
+ * ACTION can be "add", "remove", "change"
* DEVPATH is like "/block/sda" or "/class/input/mice"
*/
action = getenv("ACTION");
@@ -893,39 +1108,20 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
if (!action || !env_devpath /*|| !G.subsystem*/)
bb_show_usage();
fw = getenv("FIRMWARE");
- /* If it exists, does /dev/mdev.seq match $SEQNUM?
- * If it does not match, earlier mdev is running
- * in parallel, and we need to wait */
seq = getenv("SEQNUM");
- if (seq) {
- int timeout = 2000 / 32; /* 2000 msec */
- do {
- int seqlen;
- char seqbuf[sizeof(int)*3 + 2];
-
- seqlen = open_read_close("mdev.seq", seqbuf, sizeof(seqbuf) - 1);
- if (seqlen < 0) {
- seq = NULL;
- break;
- }
- seqbuf[seqlen] = '\0';
- if (seqbuf[0] == '\n' /* seed file? */
- || strcmp(seq, seqbuf) == 0 /* correct idx? */
- ) {
- break;
- }
- usleep(32*1000);
- } while (--timeout);
- }
- {
- int logfd = open("/dev/mdev.log", O_WRONLY | O_APPEND);
- if (logfd >= 0) {
- xmove_fd(logfd, STDERR_FILENO);
- G.verbose = 1;
- bb_error_msg("seq: %s action: %s", seq, action);
- }
- }
+ my_pid = getpid();
+ open_mdev_log(seq, my_pid);
+
+ seq_fd = seq ? wait_for_seqfile(seq) : -1;
+
+ dbg1("%s "
+ "ACTION:%s SUBSYSTEM:%s DEVNAME:%s DEVPATH:%s"
+ "%s%s",
+ curtime(),
+ action, G.subsystem, env_devname, env_devpath,
+ fw ? " FW:" : "", fw ? fw : ""
+ );
snprintf(temp, PATH_MAX, "/sys%s", env_devpath);
if (op == OP_remove) {
@@ -935,16 +1131,18 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
if (!fw)
make_device(env_devname, temp, op);
}
- else if (op == OP_add) {
+ else {
make_device(env_devname, temp, op);
if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) {
- if (fw)
+ if (op == OP_add && fw)
load_firmware(fw, temp);
}
}
- if (seq) {
- xopen_xwrite_close("mdev.seq", utoa(xatou(seq) + 1));
+ dbg1("%s exiting", curtime());
+ if (seq_fd >= 0) {
+ xwrite_str(seq_fd, utoa(xatou(seq) + 1));
+ signal_mdevs(my_pid);
}
}
diff --git a/util-linux/volume_id/ntfs.c b/util-linux/volume_id/ntfs.c
index 7b2612f..0444e54 100644
--- a/util-linux/volume_id/ntfs.c
+++ b/util-linux/volume_id/ntfs.c
@@ -150,7 +150,7 @@ int FAST_FUNC volume_id_probe_ntfs(struct volume_id *id /*,uint64_t off*/)
attr = (struct file_attribute*) &buf[attr_off];
attr_type = le32_to_cpu(attr->type);
- attr_len = le16_to_cpu(attr->len);
+ attr_len = le32_to_cpu(attr->len);
val_off = le16_to_cpu(attr->value_offset);
val_len = le32_to_cpu(attr->value_len);
attr_off += attr_len;