51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*
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* Copyright © 2020 Alexey Gladkov <gladkov.alexey@gmail.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <assert.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <linux/mount.h>
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#include <linux/unistd.h>
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static inline int fsopen(const char *fsname, unsigned int flags)
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{
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return syscall(__NR_fsopen, fsname, flags);
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}
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static inline int fsconfig(int fd, unsigned int cmd, const char *key, const void *val, int aux)
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{
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return syscall(__NR_fsconfig, fd, cmd, key, val, aux);
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}
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int main(void)
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{
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int fsfd, ret;
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int hidepid = 2;
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assert((fsfd = fsopen("proc", 0)) != -1);
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ret = fsconfig(fsfd, FSCONFIG_SET_BINARY, "hidepid", &hidepid, 0);
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assert(ret == -1);
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assert(errno == EINVAL);
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assert(!fsconfig(fsfd, FSCONFIG_SET_STRING, "hidepid", "2", 0));
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assert(!fsconfig(fsfd, FSCONFIG_SET_STRING, "hidepid", "invisible", 0));
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assert(!close(fsfd));
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return 0;
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}
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