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Split qual_syscall into separate functions

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Split qual_syscall into qualify_scno, qualify_syscall_class,
and qualify_syscall_name.
This might be needed later to implement syscall fault injection.

* syscall.c (qualify_scno, qualify_syscall_class, qualify_syscall_name):
New functions.
(qual_syscall): Use them.
This commit is contained in:
Дмитрий Левин 2016-11-15 22:57:33 +00:00
parent b299b3e611
commit 0323fa3217
1 changed files with 63 additions and 33 deletions
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96
syscall.c
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@ -427,6 +427,19 @@ qualify_one(const unsigned int n, unsigned int bitflag, const int not, const int
}
}
static bool
qualify_scno(const char *const s, const unsigned int bitflag,
const int not)
{
unsigned int i;
if (*s < '0' || *s > '9' || (i = string_to_uint(s)) >= MAX_NSYSCALLS)
return false;
qualify_one(i, bitflag, not, -1);
return true;
}
static int
lookup_class(const char *s)
{
@ -447,45 +460,62 @@ lookup_class(const char *s)
return -1;
}
static bool
qualify_syscall_class(const char *const s, const unsigned int bitflag,
const int not)
{
unsigned int p;
const int n = lookup_class(s);
if (n < 0)
return false;
for (p = 0; p < SUPPORTED_PERSONALITIES; ++p) {
unsigned int i;
for (i = 0; i < nsyscall_vec[p]; ++i) {
if (sysent_vec[p][i].sys_name
&& (sysent_vec[p][i].sys_flags & n) == n) {
qualify_one(i, bitflag, not, p);
}
}
}
return true;
}
static bool
qualify_syscall_name(const char *const s, const unsigned int bitflag,
const int not)
{
bool found = false;
unsigned int p;
for (p = 0; p < SUPPORTED_PERSONALITIES; ++p) {
unsigned int i;
for (i = 0; i < nsyscall_vec[p]; ++i) {
if (sysent_vec[p][i].sys_name
&& strcmp(s, sysent_vec[p][i].sys_name) == 0) {
qualify_one(i, bitflag, not, p);
found = true;
}
}
}
return found;
}
static int
qual_syscall(const char *s, const unsigned int bitflag, const int not)
{
unsigned int p;
unsigned int i;
int n;
int rc = -1;
if ((n = lookup_class(s)) >= 0) {
for (p = 0; p < SUPPORTED_PERSONALITIES; ++p) {
for (i = 0; i < nsyscall_vec[p]; ++i) {
if ((sysent_vec[p][i].sys_flags & n) == n) {
qualify_one(i, bitflag, not, p);
}
}
}
if (qualify_scno(s, bitflag, not)
|| qualify_syscall_class(s, bitflag, not)
|| qualify_syscall_name(s, bitflag, not)) {
return 0;
}
if (*s >= '0' && *s <= '9') {
i = string_to_uint(s);
if (i >= MAX_NSYSCALLS)
return -1;
qualify_one(i, bitflag, not, -1);
return 0;
}
for (p = 0; p < SUPPORTED_PERSONALITIES; p++) {
for (i = 0; i < nsyscall_vec[p]; i++) {
if (sysent_vec[p][i].sys_name
&& strcmp(s, sysent_vec[p][i].sys_name) == 0
) {
qualify_one(i, bitflag, not, p);
rc = 0;
}
}
}
return rc;
return -1;
}
static int