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#include "defs.h"
/* these constants are the same as in <linux/capability.h> */
enum {
#include "caps0.h"
};
#include "xlat/cap_mask0.h"
/* these constants are CAP_TO_INDEX'ed constants from <linux/capability.h> */
enum {
#include "caps1.h"
};
#include "xlat/cap_mask1.h"
/* these constants are the same as in <linux/capability.h> */
enum {
_LINUX_CAPABILITY_VERSION_1 = 0x19980330,
_LINUX_CAPABILITY_VERSION_2 = 0x20071026,
_LINUX_CAPABILITY_VERSION_3 = 0x20080522
};
#include "xlat/cap_version.h"
typedef struct user_cap_header_struct {
uint32_t version;
int pid;
} *cap_user_header_t;
typedef struct user_cap_data_struct {
uint32_t effective;
uint32_t permitted;
uint32_t inheritable;
} *cap_user_data_t;
static cap_user_header_t
get_cap_header(struct tcb *tcp, unsigned long addr)
{
static struct user_cap_header_struct header;
if (!addr || !verbose(tcp))
return NULL;
if (umove(tcp, addr, &header) < 0)
return NULL;
return &header;
}
static void
print_cap_header(struct tcb *tcp, unsigned long addr, cap_user_header_t h)
{
if (!addr) {
tprints("NULL");
return;
}
if (!h) {
tprintf("%#lx", addr);
return;
}
tprints("{");
printxval(cap_version, h->version,
"_LINUX_CAPABILITY_VERSION_???");
tprintf(", %d}", h->pid);
}
static void
print_cap_bits(const uint32_t lo, const uint32_t hi)
{
if (lo || !hi)
printflags(cap_mask0, lo, "CAP_???");
if (hi) {
if (lo)
tprints("|");
printflags(cap_mask1, hi, "CAP_???");
}
}
static void
print_cap_data(struct tcb *tcp, unsigned long addr, const cap_user_header_t h)
{
struct user_cap_data_struct data[2];
unsigned int len;
if (!addr) {
tprints("NULL");
return;
}
if (!h || !verbose(tcp) ||
(exiting(tcp) && syserror(tcp))) {
tprintf("%#lx", addr);
return;
}
if (_LINUX_CAPABILITY_VERSION_2 == h->version ||
_LINUX_CAPABILITY_VERSION_3 == h->version)
len = 2;
else
len = 1;
if (umoven(tcp, addr, len * sizeof(data[0]), data) < 0) {
tprintf("%#lx", addr);
return;
}
tprints("{");
print_cap_bits(data[0].effective, len > 1 ? data[1].effective : 0);
tprints(", ");
print_cap_bits(data[0].permitted, len > 1 ? data[1].permitted : 0);
tprints(", ");
print_cap_bits(data[0].inheritable, len > 1 ? data[1].inheritable : 0);
tprints("}");
}
int
sys_capget(struct tcb *tcp)
{
cap_user_header_t h;
if (entering(tcp)) {
h = get_cap_header(tcp, tcp->u_arg[0]);
print_cap_header(tcp, tcp->u_arg[0], h);
tprints(", ");
} else {
h = syserror(tcp) ? NULL : get_cap_header(tcp, tcp->u_arg[0]);
print_cap_data(tcp, tcp->u_arg[1], h);
}
return 0;
}
int
sys_capset(struct tcb *tcp)
{
if (entering(tcp)) {
cap_user_header_t h = get_cap_header(tcp, tcp->u_arg[0]);
print_cap_header(tcp, tcp->u_arg[0], h);
tprints(", ");
print_cap_data(tcp, tcp->u_arg[1], h);
}
return 0;
}
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