move imported udev into place

1 files changed, 242 insertions, 0 deletions

diff --git a/src/udev/libudev-util-private.c b/src/udev/libudev-util-private.c
new file mode 100644
index 0000000000..08f0ba2228
--- /dev/null
+++ b/src/udev/libudev-util-private.c
@@ -0,0 +1,242 @@
+/*
+ * 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';
+
+        dbg(udev, "stat '%s'\n", p);
+        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;
+
+        dbg(udev, "mkdir '%s'\n", p);
+        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;
+        size_t buflen = sysconf(_SC_GETPW_R_SIZE_MAX);
+        char buf[buflen];
+        struct passwd pwbuf;
+        struct passwd *pw;
+        uid_t uid;
+
+        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;
+        size_t buflen = sysconf(_SC_GETGR_R_SIZE_MAX);
+        char *buf;
+        struct group grbuf;
+        struct group *gr;
+        gid_t gid = 0;
+
+        if (strcmp(group, "root") == 0)
+                return 0;
+        gid = strtoul(group, &endptr, 10);
+        if (endptr[0] == '\0')
+                return gid;
+        buf = NULL;
+        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';
+                info(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);
+                info(udev, "path '[%s/%s]%s' is '%s'\n", subsys, sysname, attr, result);
+        }
+        udev_device_unref(dev);
+        return 0;
+}