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util: add function for dropping root privileges

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Share the code for dropping supplementary groups and setting effective,
saved, and real user UID/GID between system drivers.
This commit is contained in:
Miroslav Lichvar
2015-12-08 17:16:45 +01:00
parent 334ac06102
commit 3cf6acdf24
6 changed files with 28 additions and 34 deletions
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3
util.h
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@@ -145,6 +145,9 @@ extern int UTI_CreateDirAndParents(const char *path, mode_t mode, uid_t uid, gid
permissions and its uid/gid must match the specified values. */
extern int UTI_CheckDirPermissions(const char *path, mode_t perm, uid_t uid, gid_t gid);
/* Set process user/group IDs and drop supplementary groups */
extern void UTI_DropRoot(uid_t uid, gid_t gid);
/* Fill buffer with random bytes */
extern void UTI_GetRandomBytes(void *buf, unsigned int len);