81 lines
2.2 KiB
C
81 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* manage device node user ACL
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include "sd-login.h"
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#include "device-util.h"
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#include "login-util.h"
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#include "logind-acl.h"
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#include "log.h"
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#include "udev-builtin.h"
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static int builtin_uaccess(sd_device *dev, int argc, char *argv[], bool test) {
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const char *path = NULL, *seat;
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bool changed_acl = false;
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uid_t uid;
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int r;
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umask(0022);
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/* don't muck around with ACLs when the system is not running systemd */
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if (!logind_running())
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return 0;
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r = sd_device_get_devname(dev, &path);
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if (r < 0) {
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log_device_error_errno(dev, r, "Failed to get device name: %m");
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goto finish;
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}
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if (sd_device_get_property_value(dev, "ID_SEAT", &seat) < 0)
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seat = "seat0";
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r = sd_seat_get_active(seat, NULL, &uid);
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if (r < 0) {
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if (IN_SET(r, -ENXIO, -ENODATA))
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/* No active session on this seat */
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r = 0;
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else
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log_device_error_errno(dev, r, "Failed to determine active user on seat %s: %m", seat);
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goto finish;
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}
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r = devnode_acl(path, true, false, 0, true, uid);
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if (r < 0) {
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log_device_full_errno(dev, r == -ENOENT ? LOG_DEBUG : LOG_ERR, r, "Failed to apply ACL: %m");
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goto finish;
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}
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changed_acl = true;
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r = 0;
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finish:
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if (path && !changed_acl) {
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int k;
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/* Better be safe than sorry and reset ACL */
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k = devnode_acl(path, true, false, 0, false, 0);
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if (k < 0) {
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log_device_full_errno(dev, k == -ENOENT ? LOG_DEBUG : LOG_ERR, k, "Failed to apply ACL: %m");
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if (r >= 0)
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r = k;
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}
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}
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return r;
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}
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const UdevBuiltin udev_builtin_uaccess = {
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.name = "uaccess",
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.cmd = builtin_uaccess,
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.help = "Manage device node user ACL",
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};
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