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Red Hat Bugzilla – Attachment 193981 Details for
Bug 288461
dev_lock fails with suid applications
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test program to exhibit the problem
devlocktest.c (text/plain), 802 bytes, created by
Dennis van Dok
on 2007-09-12 21:03:08 UTC
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Description:
test program to exhibit the problem
Filename:
MIME Type:
Creator:
Dennis van Dok
Created:
2007-09-12 21:03:08 UTC
Size:
802 bytes
patch
obsolete
>#include <stdlib.h> >#include <stdio.h> >#include <lockdev.h> >#include <sys/types.h> >#include <unistd.h> > >int main(int argc, char *argv[]) >{ > pid_t ret; > // test the lock_dev call > uid_t uid, euid; > char *dev; > > uid = getuid(); > euid = geteuid(); > > if (argc > 1) { > dev = argv[1]; > } else { > printf("Usage: %s <device>\n", argv[0]); > return 1; > } > printf("Pid: %u, Real uid: %u; effective uid: %u.\n", getpid(), uid, euid); > > printf("Trying to lock device: %s\n", dev); > > ret = dev_lock(dev); > if (ret < 0) { > perror("dev_lock"); > return ret; > } else { > printf("success\n"); > } > > printf("Unlocking device...\n"); > ret = dev_unlock(dev, getpid()); > if (0 > ret) { > perror("dev_unlock"); > return ret; > } else { > printf("success\n"); > } > return ret; >}
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bug 288461
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