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udev: replace util_create_path() with mkdir_parents()

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This commit is contained in:
Kay Sievers 2012-04-17 00:26:02 +02:00
parent f13b388f97
commit 9e13dbae50
13 changed files with 194 additions and 263 deletions
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6
Makefile.am
View File

@ -1337,7 +1337,6 @@ noinst_LTLIBRARIES += \
libudev_private_la_SOURCES =\
$(libudev_la_SOURCES) \
src/libudev/libudev-util-private.c \
src/libudev/libudev-device-private.c \
src/libudev/libudev-queue-private.c
@ -1451,6 +1450,7 @@ libudev_core_la_CFLAGS = \
libudev_core_la_LIBADD = \
libudev-private.la \
libsystemd-label.la \
libsystemd-shared.la \
$(BLKID_LIBS) \
$(KMOD_LIBS)
@ -1503,6 +1503,7 @@ test_libudev_SOURCES = \
src/test/test-libudev.c
test_libudev_LDADD = \
libsystemd-label.la \
libsystemd-shared.la \
libudev.la
@ -1522,6 +1523,7 @@ test_udev_CPPFLAGS =\
$(libudev_core_la_CPPFLAGS)
test_udev_LDADD = \
libsystemd-label.la \
libsystemd-shared.la \
$(BLKID_LIBS) \
$(KMOD_LIBS) \
@ -3249,7 +3251,7 @@ upload: all distcheck
doc-sync: all
rsync -av --delete docs/libudev/html/ www.freedesktop.org:/srv/www.freedesktop.org/www/software/systemd/libudev/
rsync -av --delete docs/gudev/html/ www.freedesktop.org:/srv/www.freedesktop.org/www/software/systemd/gudev/
rsync -av --delete man/*.html www.freedesktop.org:/srv/www.freedesktop.org/www/software/systemd/man/
rsync -av man/*.html www.freedesktop.org:/srv/www.freedesktop.org/www/software/systemd/man/
git-tag:
git tag "v$(VERSION)" -m "systemd $(VERSION)"

2
TODO
View File

@ -19,8 +19,6 @@ Features:
* udev: unify selinux stuff with systemd
* udev: move udev's recursive mkdir to shared/
* udev: find a way to tell udev to not cancel firmware requests when running in initramfs
* udev: scsi_id -> sg3_utils -> kill scsi_id

7
src/libudev/libudev-device-private.c
View File

@ -25,7 +25,6 @@
static void udev_device_tag(struct udev_device *dev, const char *tag, bool add)
{
const char *id;
struct udev *udev = udev_device_get_udev(dev);
char filename[UTIL_PATH_SIZE];
id = udev_device_get_id_filename(dev);
@ -36,7 +35,7 @@ static void udev_device_tag(struct udev_device *dev, const char *tag, bool add)
if (add) {
int fd;
util_create_path(udev, filename);
mkdir_parents(filename, 0755);
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
if (fd >= 0)
close(fd);
@ -96,9 +95,9 @@ static bool device_has_info(struct udev_device *udev_device)
int udev_device_update_db(struct udev_device *udev_device)
{
struct udev *udev = udev_device_get_udev(udev_device);
bool has_info;
const char *id;
struct udev *udev = udev_device_get_udev(udev_device);
char filename[UTIL_PATH_SIZE];
char filename_tmp[UTIL_PATH_SIZE];
FILE *f;
@ -120,7 +119,7 @@ int udev_device_update_db(struct udev_device *udev_device)
/* write a database file */
util_strscpyl(filename_tmp, sizeof(filename_tmp), filename, ".tmp", NULL);
util_create_path(udev, filename_tmp);
mkdir_parents(filename_tmp, 0755);
f = fopen(filename_tmp, "we");
if (f == NULL) {
err(udev, "unable to create temporary db file '%s': %m\n", filename_tmp);

6
src/libudev/libudev-private.h
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@ -16,9 +16,11 @@
#include <signal.h>
#include <stdint.h>
#include <stdbool.h>
#include "libudev.h"
#include "macro.h"
#include "util.h"
#include "libudev.h"
#include "mkdir.h"
#define READ_END 0
#define WRITE_END 1
@ -164,8 +166,6 @@ unsigned int util_string_hash32(const char *key);
uint64_t util_string_bloom64(const char *str);
/* libudev-util-private.c */
int util_create_path(struct udev *udev, const char *path);
int util_create_path_selinux(struct udev *udev, const char *path);
int util_delete_path(struct udev *udev, const char *path);
uid_t util_lookup_user(struct udev *udev, const char *user);
gid_t util_lookup_group(struct udev *udev, const char *group);

239
src/libudev/libudev-util-private.c
View File

@ -1,239 +0,0 @@
/*
* libudev - interface to udev device information
*
* Copyright (C) 2003-2009 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include <sys/param.h>
#include "libudev.h"
#include "libudev-private.h"
static int create_path(struct udev *udev, const char *path, bool selinux)
{
char p[UTIL_PATH_SIZE];
char *pos;
struct stat stats;
int err;
util_strscpy(p, sizeof(p), path);
pos = strrchr(p, '/');
if (pos == NULL)
return 0;
while (pos != p && pos[-1] == '/')
pos--;
if (pos == p)
return 0;
pos[0] = '\0';
if (stat(p, &stats) == 0) {
if ((stats.st_mode & S_IFMT) == S_IFDIR)
return 0;
else
return -ENOTDIR;
}
err = util_create_path(udev, p);
if (err != 0)
return err;
if (selinux)
udev_selinux_setfscreatecon(udev, p, S_IFDIR|0755);
err = mkdir(p, 0755);
if (err != 0) {
err = -errno;
if (err == -EEXIST && stat(p, &stats) == 0) {
if ((stats.st_mode & S_IFMT) == S_IFDIR)
err = 0;
else
err = -ENOTDIR;
}
}
if (selinux)
udev_selinux_resetfscreatecon(udev);
return err;
}
int util_create_path(struct udev *udev, const char *path)
{
return create_path(udev, path, false);
}
int util_create_path_selinux(struct udev *udev, const char *path)
{
return create_path(udev, path, true);
}
int util_delete_path(struct udev *udev, const char *path)
{
char p[UTIL_PATH_SIZE];
char *pos;
int err = 0;
if (path[0] == '/')
while(path[1] == '/')
path++;
util_strscpy(p, sizeof(p), path);
pos = strrchr(p, '/');
if (pos == p || pos == NULL)
return 0;
for (;;) {
*pos = '\0';
pos = strrchr(p, '/');
/* don't remove the last one */
if ((pos == p) || (pos == NULL))
break;
err = rmdir(p);
if (err < 0) {
if (errno == ENOENT)
err = 0;
break;
}
}
return err;
}
uid_t util_lookup_user(struct udev *udev, const char *user)
{
char *endptr;
struct passwd pwbuf;
struct passwd *pw;
uid_t uid;
size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
char *buf = alloca(buflen);
if (strcmp(user, "root") == 0)
return 0;
uid = strtoul(user, &endptr, 10);
if (endptr[0] == '\0')
return uid;
errno = getpwnam_r(user, &pwbuf, buf, buflen, &pw);
if (pw != NULL)
return pw->pw_uid;
if (errno == 0 || errno == ENOENT || errno == ESRCH)
err(udev, "specified user '%s' unknown\n", user);
else
err(udev, "error resolving user '%s': %m\n", user);
return 0;
}
gid_t util_lookup_group(struct udev *udev, const char *group)
{
char *endptr;
struct group grbuf;
struct group *gr;
gid_t gid = 0;
size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
char *buf = NULL;
if (strcmp(group, "root") == 0)
return 0;
gid = strtoul(group, &endptr, 10);
if (endptr[0] == '\0')
return gid;
gid = 0;
for (;;) {
char *newbuf;
newbuf = realloc(buf, buflen);
if (!newbuf)
break;
buf = newbuf;
errno = getgrnam_r(group, &grbuf, buf, buflen, &gr);
if (gr != NULL) {
gid = gr->gr_gid;
} else if (errno == ERANGE) {
buflen *= 2;
continue;
} else if (errno == 0 || errno == ENOENT || errno == ESRCH) {
err(udev, "specified group '%s' unknown\n", group);
} else {
err(udev, "error resolving group '%s': %m\n", group);
}
break;
}
free(buf);
return gid;
}
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
int util_resolve_subsys_kernel(struct udev *udev, const char *string,
char *result, size_t maxsize, int read_value)
{
char temp[UTIL_PATH_SIZE];
char *subsys;
char *sysname;
struct udev_device *dev;
char *attr;
if (string[0] != '[')
return -1;
util_strscpy(temp, sizeof(temp), string);
subsys = &temp[1];
sysname = strchr(subsys, '/');
if (sysname == NULL)
return -1;
sysname[0] = '\0';
sysname = &sysname[1];
attr = strchr(sysname, ']');
if (attr == NULL)
return -1;
attr[0] = '\0';
attr = &attr[1];
if (attr[0] == '/')
attr = &attr[1];
if (attr[0] == '\0')
attr = NULL;
if (read_value && attr == NULL)
return -1;
dev = udev_device_new_from_subsystem_sysname(udev, subsys, sysname);
if (dev == NULL)
return -1;
if (read_value) {
const char *val;
val = udev_device_get_sysattr_value(dev, attr);
if (val != NULL)
util_strscpy(result, maxsize, val);
else
result[0] = '\0';
dbg(udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
} else {
size_t l;
char *s;
s = result;
l = util_strpcpyl(&s, maxsize, udev_device_get_syspath(dev), NULL);
if (attr != NULL)
util_strpcpyl(&s, l, "/", attr, NULL);
dbg(udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
}
udev_device_unref(dev);
return 0;
}

161
src/libudev/libudev-util.c
View File

@ -19,7 +19,10 @@
#include <ctype.h>
#include <fcntl.h>
#include <time.h>
#include <pwd.h>
#include <grp.h>
#include <sys/stat.h>
#include <sys/param.h>
#include "libudev.h"
#include "libudev-private.h"
@ -29,6 +32,164 @@
* @short_description: utils
*/
int util_delete_path(struct udev *udev, const char *path)
{
char p[UTIL_PATH_SIZE];
char *pos;
int err = 0;
if (path[0] == '/')
while(path[1] == '/')
path++;
util_strscpy(p, sizeof(p), path);
pos = strrchr(p, '/');
if (pos == p || pos == NULL)
return 0;
for (;;) {
*pos = '\0';
pos = strrchr(p, '/');
/* don't remove the last one */
if ((pos == p) || (pos == NULL))
break;
err = rmdir(p);
if (err < 0) {
if (errno == ENOENT)
err = 0;
break;
}
}
return err;
}
uid_t util_lookup_user(struct udev *udev, const char *user)
{
char *endptr;
struct passwd pwbuf;
struct passwd *pw;
uid_t uid;
size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
char *buf = alloca(buflen);
if (strcmp(user, "root") == 0)
return 0;
uid = strtoul(user, &endptr, 10);
if (endptr[0] == '\0')
return uid;
errno = getpwnam_r(user, &pwbuf, buf, buflen, &pw);
if (pw != NULL)
return pw->pw_uid;
if (errno == 0 || errno == ENOENT || errno == ESRCH)
err(udev, "specified user '%s' unknown\n", user);
else
err(udev, "error resolving user '%s': %m\n", user);
return 0;
}
gid_t util_lookup_group(struct udev *udev, const char *group)
{
char *endptr;
struct group grbuf;
struct group *gr;
gid_t gid = 0;
size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
char *buf = NULL;
if (strcmp(group, "root") == 0)
return 0;
gid = strtoul(group, &endptr, 10);
if (endptr[0] == '\0')
return gid;
gid = 0;
for (;;) {
char *newbuf;
newbuf = realloc(buf, buflen);
if (!newbuf)
break;
buf = newbuf;
errno = getgrnam_r(group, &grbuf, buf, buflen, &gr);
if (gr != NULL) {
gid = gr->gr_gid;
} else if (errno == ERANGE) {
buflen *= 2;
continue;
} else if (errno == 0 || errno == ENOENT || errno == ESRCH) {
err(udev, "specified group '%s' unknown\n", group);
} else {
err(udev, "error resolving group '%s': %m\n", group);
}
break;
}
free(buf);
return gid;
}
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
int util_resolve_subsys_kernel(struct udev *udev, const char *string,
char *result, size_t maxsize, int read_value)
{
char temp[UTIL_PATH_SIZE];
char *subsys;
char *sysname;
struct udev_device *dev;
char *attr;
if (string[0] != '[')
return -1;
util_strscpy(temp, sizeof(temp), string);
subsys = &temp[1];
sysname = strchr(subsys, '/');
if (sysname == NULL)
return -1;
sysname[0] = '\0';
sysname = &sysname[1];
attr = strchr(sysname, ']');
if (attr == NULL)
return -1;
attr[0] = '\0';
attr = &attr[1];
if (attr[0] == '/')
attr = &attr[1];
if (attr[0] == '\0')
attr = NULL;
if (read_value && attr == NULL)
return -1;
dev = udev_device_new_from_subsystem_sysname(udev, subsys, sysname);
if (dev == NULL)
return -1;
if (read_value) {
const char *val;
val = udev_device_get_sysattr_value(dev, attr);
if (val != NULL)
util_strscpy(result, maxsize, val);
else
result[0] = '\0';
dbg(udev, "value '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
} else {
size_t l;
char *s;
s = result;
l = util_strpcpyl(&s, maxsize, udev_device_get_syspath(dev), NULL);
if (attr != NULL)
util_strpcpyl(&s, l, "/", attr, NULL);
dbg(udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
}
udev_device_unref(dev);
return 0;
}
ssize_t util_get_sys_core_link_value(struct udev *udev, const char *slink, const char *syspath, char *value, size_t size)
{
char path[UTIL_PATH_SIZE];

2
src/login/logind-user-dbus.c
View File

@ -189,7 +189,7 @@ static int bus_user_append_idle_hint_since(DBusMessageIter *i, const char *prope
return 0;
}
static bus_user_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
static int bus_user_append_default_cgroup(DBusMessageIter *i, const char *property, void *data) {
User *u = data;
char *t;
int r;

18
src/shared/mkdir.c
View File

@ -53,13 +53,24 @@ int safe_mkdir(const char *path, mode_t mode, uid_t uid, gid_t gid) {
}
int mkdir_parents(const char *path, mode_t mode) {
struct stat st;
const char *p, *e;
assert(path);
/* Creates every parent directory in the path except the last
* component. */
/* return immediately if directory exists */
e = strrchr(path, '/');
if (!e)
return -EINVAL;
p = strndupa(path, e - path);
if (stat(p, &st) >= 0) {
if ((st.st_mode & S_IFMT) == S_IFDIR)
return 0;
else
return -ENOTDIR;
}
/* create every parent directory in the path, except the last component */
p = path + strspn(path, "/");
for (;;) {
int r;
@ -73,11 +84,10 @@ int mkdir_parents(const char *path, mode_t mode) {
if (*p == 0)
return 0;
if (!(t = strndup(path, e - path)))
if (!(t = strndupa(path, e - path)))
return -ENOMEM;
r = label_mkdir(t, mode);
free(t);
if (r < 0 && errno != EEXIST)
return -errno;

2
src/test/test-udev.c
View File

@ -96,7 +96,7 @@ int main(int argc, char *argv[])
mode |= S_IFCHR;
if (strcmp(action, "remove") != 0) {
util_create_path(udev, udev_device_get_devnode(dev));
mkdir_parents(udev_device_get_devnode(dev), 0755);
mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
} else {
unlink(udev_device_get_devnode(dev));

2
src/udev/udev-builtin-firmware.c
View File

@ -121,7 +121,7 @@ static int builtin_firmware(struct udev_device *dev, int argc, char *argv[], boo
/* This link indicates the missing firmware file and the associated device */
log_debug("did not find firmware file '%s'\n", firmware);
do {
err = util_create_path(udev, misspath);
err = mkdir_parents(misspath, 0755);
if (err != 0 && err != -ENOENT)
break;
err = symlink(udev_device_get_devpath(dev), misspath);

6
src/udev/udev-node.c
View File

@ -100,7 +100,7 @@ static int node_symlink(struct udev *udev, const char *node, const char *slink)
} else {
log_debug("creating symlink '%s' to '%s'\n", slink, target);
do {
err = util_create_path_selinux(udev, slink);
err = mkdir_parents(slink, 0755);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, slink, S_IFLNK);
@ -117,7 +117,7 @@ static int node_symlink(struct udev *udev, const char *node, const char *slink)
util_strscpyl(slink_tmp, sizeof(slink_tmp), slink, TMP_FILE_EXT, NULL);
unlink(slink_tmp);
do {
err = util_create_path_selinux(udev, slink_tmp);
err = mkdir_parents(slink_tmp, 0755);
if (err != 0 && err != -ENOENT)
break;
udev_selinux_setfscreatecon(udev, slink_tmp, S_IFLNK);
@ -226,7 +226,7 @@ static void link_update(struct udev_device *dev, const char *slink, bool add)
do {
int fd;
err = util_create_path(udev, filename);
err = mkdir_parents(filename, 0755);
if (err != 0 && err != -ENOENT)
break;
fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);

2
src/udev/udev-watch.c
View File

@ -111,7 +111,7 @@ void udev_watch_begin(struct udev *udev, struct udev_device *dev)
}
snprintf(filename, sizeof(filename), "/run/udev/watch/%d", wd);
util_create_path(udev, filename);
mkdir_parents(filename, 0755);
unlink(filename);
symlink(udev_device_get_id_filename(dev), filename);

4
src/udev/udevd.c
View File

@ -857,7 +857,7 @@ static void static_dev_create_from_modules(struct udev *udev)
continue;
util_strscpyl(filename, sizeof(filename), "/dev/", devname, NULL);
util_create_path_selinux(udev, filename);
mkdir_parents(filename, 0755);
udev_selinux_setfscreatecon(udev, filename, mode);
log_debug("mknod '%s' %c%u:%u\n", filename, type, maj, min);
if (mknod(filename, mode, makedev(maj, min)) < 0 && errno == EEXIST)
@ -938,7 +938,7 @@ static int convert_db(struct udev *udev)
return 0;
/* make sure we do not get here again */
util_create_path(udev, "/run/udev/data");
mkdir_parents("/run/udev/data", 0755);
mkdir(filename, 0755);
/* old database */