+++ /dev/null
-/*
- * 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;
-}
~ianmdlvl / elogind.git / blobdiff