| 1 |
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| 2 |
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| 3 | #ifndef __IDMAP_UTILS_H
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| 4 | #define __IDMAP_UTILS_H
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| 5 |
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| 6 | #ifndef _GNU_SOURCE
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| 7 | #define _GNU_SOURCE
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| 8 | #endif
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| 9 | #include <errno.h>
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| 10 | #include <linux/types.h>
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| 11 | #include <sched.h>
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| 12 | #include <signal.h>
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| 13 | #include <stdbool.h>
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| 14 | #include <stdio.h>
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| 15 | #include <stdlib.h>
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| 16 | #include <string.h>
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| 17 | #include <syscall.h>
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| 18 | #include <sys/capability.h>
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| 19 | #include <sys/fsuid.h>
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| 20 | #include <sys/types.h>
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| 21 | #include <unistd.h>
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| 22 |
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| 23 | extern int get_userns_fd(unsigned long nsid, unsigned long hostid,
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| 24 | unsigned long range);
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| 25 |
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| 26 | extern int caps_down(void);
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| 27 | extern int cap_down(cap_value_t down);
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| 28 |
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| 29 | extern bool switch_ids(uid_t uid, gid_t gid);
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| 30 | extern int setup_userns(void);
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| 31 | extern int enter_userns(void);
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| 32 |
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| 33 | static inline bool switch_userns(int fd, uid_t uid, gid_t gid, bool drop_caps)
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| 34 | {
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| 35 | if (setns(fd, CLONE_NEWUSER))
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| 36 | return false;
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| 37 |
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| 38 | if (!switch_ids(uid, gid))
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| 39 | return false;
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| 40 |
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| 41 | if (drop_caps && !caps_down())
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| 42 | return false;
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| 43 |
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| 44 | return true;
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| 45 | }
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| 46 |
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| 47 | extern int wait_for_pid(pid_t pid);
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| 48 | extern int write_file(const char *path, const char *val);
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| 49 | extern uint64_t get_unique_mnt_id(const char *path);
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| 50 |
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| 51 | #endif
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