0baafa0ef4
Closer to KNF, better coding practices, more similar to other services, no more global variables, a few more comments, that kind of stuff. No major functional changes. Change-Id: I6e8f53bfafd6f41e92031fba76c40a31d2107a8e
35 lines
696 B
C
35 lines
696 B
C
#include "inc.h"
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int
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check_perm(struct ipc_perm * req, endpoint_t who, int mode)
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{
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int req_mode;
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int cur_mode;
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uid_t uid;
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gid_t gid;
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uid = getnuid(who);
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gid = getngid(who);
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mode &= 0666;
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/* Root is allowed to do anything. */
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if (uid == 0)
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return 1;
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if (uid == req->uid || uid == req->cuid) {
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/* Same user. */
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req_mode = (req->mode >> 6) & 0x7;
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cur_mode = (mode >> 6) & 0x7;
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} else if (gid == req->gid || gid == req->cgid) {
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/* Same group. */
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req_mode = (req->mode >> 3) & 0x7;
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cur_mode = (mode >> 3) & 0x7;
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} else {
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/* Other user and group. */
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req_mode = req->mode & 0x7;
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cur_mode = mode & 0x7;
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}
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return (cur_mode && ((cur_mode & req_mode) == cur_mode));
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}
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