| Line |
Branch |
Exec |
Source |
| 1 |
|
|
/** |
| 2 |
|
|
* This file is part of the CernVM File System. |
| 3 |
|
|
*/ |
| 4 |
|
|
|
| 5 |
|
|
|
| 6 |
|
|
#include "swissknife_capabilities.h" |
| 7 |
|
|
|
| 8 |
|
|
#include <errno.h> |
| 9 |
|
|
#include <sys/capability.h> |
| 10 |
|
|
|
| 11 |
|
|
#include <cassert> |
| 12 |
|
|
|
| 13 |
|
|
#include "util/logging.h" |
| 14 |
|
|
|
| 15 |
|
|
namespace swissknife { |
| 16 |
|
|
|
| 17 |
|
✗ |
bool ObtainDacReadSearchCapability() { |
| 18 |
|
✗ |
const cap_value_t cap = CAP_DAC_READ_SEARCH; |
| 19 |
|
|
#ifdef CAP_IS_SUPPORTED |
| 20 |
|
✗ |
assert(CAP_IS_SUPPORTED(cap)); |
| 21 |
|
|
#endif |
| 22 |
|
|
|
| 23 |
|
✗ |
cap_t caps_proc = cap_get_proc(); |
| 24 |
|
✗ |
assert(caps_proc != NULL); |
| 25 |
|
|
|
| 26 |
|
|
cap_flag_value_t cap_state; |
| 27 |
|
✗ |
int retval = cap_get_flag(caps_proc, cap, CAP_EFFECTIVE, &cap_state); |
| 28 |
|
✗ |
assert(retval == 0); |
| 29 |
|
|
|
| 30 |
|
✗ |
if (cap_state == CAP_SET) { |
| 31 |
|
✗ |
cap_free(caps_proc); |
| 32 |
|
✗ |
return true; |
| 33 |
|
|
} |
| 34 |
|
|
|
| 35 |
|
✗ |
retval = cap_get_flag(caps_proc, cap, CAP_PERMITTED, &cap_state); |
| 36 |
|
✗ |
assert(retval == 0); |
| 37 |
|
✗ |
if (cap_state != CAP_SET) { |
| 38 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogStdout, |
| 39 |
|
|
"Warning: CAP_DAC_READ_SEARCH cannot be obtained. " |
| 40 |
|
|
"It's not in the process's permitted set."); |
| 41 |
|
✗ |
cap_free(caps_proc); |
| 42 |
|
✗ |
return false; |
| 43 |
|
|
} |
| 44 |
|
|
|
| 45 |
|
✗ |
retval = cap_set_flag(caps_proc, CAP_EFFECTIVE, 1, &cap, CAP_SET); |
| 46 |
|
✗ |
assert(retval == 0); |
| 47 |
|
|
|
| 48 |
|
✗ |
retval = cap_set_proc(caps_proc); |
| 49 |
|
✗ |
cap_free(caps_proc); |
| 50 |
|
|
|
| 51 |
|
✗ |
if (retval != 0) { |
| 52 |
|
✗ |
LogCvmfs(kLogCvmfs, kLogStderr, |
| 53 |
|
|
"Cannot reset capabilities for current process " |
| 54 |
|
|
"(errno: %d)", |
| 55 |
|
|
errno); |
| 56 |
|
✗ |
return false; |
| 57 |
|
|
} |
| 58 |
|
|
|
| 59 |
|
✗ |
return true; |
| 60 |
|
|
} |
| 61 |
|
|
|
| 62 |
|
|
} // namespace swissknife |
| 63 |
|
|
|