1 /* Linux namespaces(7) support. 2 3 Copyright (C) 2015-2023 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #ifndef NAT_LINUX_NAMESPACES_H 21 #define NAT_LINUX_NAMESPACES_H 22 23 /* Set to true to enable debugging of Linux namespaces code. */ 24 25 extern bool debug_linux_namespaces; 26 27 /* Enumeration of Linux namespace types. */ 28 29 enum linux_ns_type 30 { 31 /* IPC namespace: System V IPC, POSIX message queues. */ 32 LINUX_NS_IPC, 33 34 /* Mount namespace: mount points. */ 35 LINUX_NS_MNT, 36 37 /* Network namespace: network devices, stacks, ports, etc. */ 38 LINUX_NS_NET, 39 40 /* PID namespace: process IDs. */ 41 LINUX_NS_PID, 42 43 /* User namespace: user and group IDs. */ 44 LINUX_NS_USER, 45 46 /* UTS namespace: hostname and NIS domain name. */ 47 LINUX_NS_UTS, 48 49 /* Number of Linux namespaces. */ 50 NUM_LINUX_NS_TYPES 51 }; 52 53 /* Return nonzero if process PID has the same TYPE namespace as the 54 calling process, or if the kernel does not support TYPE namespaces 55 (in which case there is only one TYPE namespace). Return zero if 56 the kernel supports TYPE namespaces and the two processes have 57 different TYPE namespaces. */ 58 59 extern int linux_ns_same (pid_t pid, enum linux_ns_type type); 60 61 /* Like gdb_open_cloexec, but in the mount namespace of process 62 PID. */ 63 64 extern int linux_mntns_open_cloexec (pid_t pid, const char *filename, 65 int flags, mode_t mode); 66 67 /* Like unlink(2), but in the mount namespace of process PID. */ 68 69 extern int linux_mntns_unlink (pid_t pid, const char *filename); 70 71 /* Like readlink(2), but in the mount namespace of process PID. */ 72 73 extern ssize_t linux_mntns_readlink (pid_t pid, const char *filename, 74 char *buf, size_t bufsiz); 75 76 #endif /* NAT_LINUX_NAMESPACES_H */ 77