mirror of
https://github.com/sheumann/hush.git
synced 2024-12-25 18:33:06 +00:00
- remove most of the forward declarations. No obj-code changes.
This commit is contained in:
Bernhard Reutner-Fischer
parent
e8979889b4
commit
a702457eac
525
coreutils/test.c
525
coreutils/test.c
@ -161,90 +161,7 @@ static gid_t *group_array;
|
||||
static int ngroups;
|
||||
static jmp_buf leaving;
|
||||
|
||||
static enum token t_lex(char *s);
|
||||
static arith_t oexpr(enum token n);
|
||||
static arith_t aexpr(enum token n);
|
||||
static arith_t nexpr(enum token n);
|
||||
static int binop(void);
|
||||
static arith_t primary(enum token n);
|
||||
static int filstat(char *nm, enum token mode);
|
||||
static arith_t getn(const char *s);
|
||||
/* UNUSED
|
||||
static int newerf(const char *f1, const char *f2);
|
||||
static int olderf(const char *f1, const char *f2);
|
||||
static int equalf(const char *f1, const char *f2);
|
||||
*/
|
||||
static int test_eaccess(char *path, int mode);
|
||||
static int is_a_group_member(gid_t gid);
|
||||
static void initialize_group_array(void);
|
||||
|
||||
int test_main(int argc, char **argv)
|
||||
{
|
||||
int res;
|
||||
const char *arg0;
|
||||
bool _off;
|
||||
|
||||
arg0 = bb_basename(argv[0]);
|
||||
if (arg0[0] == '[') {
|
||||
--argc;
|
||||
if (!arg0[1]) { /* "[" ? */
|
||||
if (NOT_LONE_CHAR(argv[argc], ']')) {
|
||||
bb_error_msg("missing ]");
|
||||
return 2;
|
||||
}
|
||||
} else { /* assuming "[[" */
|
||||
if (strcmp(argv[argc], "]]") != 0) {
|
||||
bb_error_msg("missing ]]");
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
argv[argc] = NULL;
|
||||
}
|
||||
|
||||
res = setjmp(leaving);
|
||||
if (res)
|
||||
return res;
|
||||
|
||||
/* resetting ngroups is probably unnecessary. it will
|
||||
* force a new call to getgroups(), which prevents using
|
||||
* group data fetched during a previous call. but the
|
||||
* only way the group data could be stale is if there's
|
||||
* been an intervening call to setgroups(), and this
|
||||
* isn't likely in the case of a shell. paranoia
|
||||
* prevails...
|
||||
*/
|
||||
ngroups = 0;
|
||||
|
||||
/* Implement special cases from POSIX.2, section 4.62.4 */
|
||||
if (argc == 1)
|
||||
return 1;
|
||||
if (argc == 2)
|
||||
return *argv[1] == '\0';
|
||||
//assert(argc);
|
||||
/* remember if we saw argc==4 which wants *no* '!' test */
|
||||
_off = argc - 4;
|
||||
if (_off ?
|
||||
(LONE_CHAR(argv[1], '!'))
|
||||
: (argv[1][0] != '!' || argv[1][1] != '\0'))
|
||||
{
|
||||
if (argc == 3)
|
||||
return *argv[2] != '\0';
|
||||
|
||||
t_lex(argv[2 + _off]);
|
||||
if (t_wp_op && t_wp_op->op_type == BINOP) {
|
||||
t_wp = &argv[1 + _off];
|
||||
return binop() == _off;
|
||||
}
|
||||
}
|
||||
t_wp = &argv[1];
|
||||
res = !oexpr(t_lex(*t_wp));
|
||||
|
||||
if (*t_wp != NULL && *++t_wp != NULL) {
|
||||
bb_error_msg("%s: unknown operand", *t_wp);
|
||||
return 2;
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
static void syntax(const char *op, const char *msg) ATTRIBUTE_NORETURN;
|
||||
static void syntax(const char *op, const char *msg)
|
||||
@ -257,69 +174,82 @@ static void syntax(const char *op, const char *msg)
|
||||
longjmp(leaving, 2);
|
||||
}
|
||||
|
||||
static arith_t oexpr(enum token n)
|
||||
/* atoi with error detection */
|
||||
//XXX: FIXME: duplicate of existing libbb function?
|
||||
static arith_t getn(const char *s)
|
||||
{
|
||||
arith_t res;
|
||||
char *p;
|
||||
#if ENABLE_FEATURE_TEST_64
|
||||
long long r;
|
||||
#else
|
||||
long r;
|
||||
#endif
|
||||
|
||||
res = aexpr(n);
|
||||
if (t_lex(*++t_wp) == BOR) {
|
||||
return oexpr(t_lex(*++t_wp)) || res;
|
||||
}
|
||||
t_wp--;
|
||||
return res;
|
||||
errno = 0;
|
||||
#if ENABLE_FEATURE_TEST_64
|
||||
r = strtoll(s, &p, 10);
|
||||
#else
|
||||
r = strtol(s, &p, 10);
|
||||
#endif
|
||||
|
||||
if (errno != 0)
|
||||
syntax(s, "out of range");
|
||||
|
||||
if (*(skip_whitespace(p)))
|
||||
syntax(s, "bad number");
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static arith_t aexpr(enum token n)
|
||||
/* UNUSED
|
||||
static int newerf(const char *f1, const char *f2)
|
||||
{
|
||||
arith_t res;
|
||||
struct stat b1, b2;
|
||||
|
||||
res = nexpr(n);
|
||||
if (t_lex(*++t_wp) == BAND)
|
||||
return aexpr(t_lex(*++t_wp)) && res;
|
||||
t_wp--;
|
||||
return res;
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 && b1.st_mtime > b2.st_mtime);
|
||||
}
|
||||
|
||||
static arith_t nexpr(enum token n)
|
||||
static int olderf(const char *f1, const char *f2)
|
||||
{
|
||||
if (n == UNOT)
|
||||
return !nexpr(t_lex(*++t_wp));
|
||||
return primary(n);
|
||||
struct stat b1, b2;
|
||||
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 && b1.st_mtime < b2.st_mtime);
|
||||
}
|
||||
|
||||
static arith_t primary(enum token n)
|
||||
static int equalf(const char *f1, const char *f2)
|
||||
{
|
||||
arith_t res;
|
||||
struct stat b1, b2;
|
||||
|
||||
if (n == EOI) {
|
||||
syntax(NULL, "argument expected");
|
||||
}
|
||||
if (n == LPAREN) {
|
||||
res = oexpr(t_lex(*++t_wp));
|
||||
if (t_lex(*++t_wp) != RPAREN)
|
||||
syntax(NULL, "closing paren expected");
|
||||
return res;
|
||||
}
|
||||
if (t_wp_op && t_wp_op->op_type == UNOP) {
|
||||
/* unary expression */
|
||||
if (*++t_wp == NULL)
|
||||
syntax(t_wp_op->op_text, "argument expected");
|
||||
if (n == STREZ)
|
||||
return t_wp[0][0] == '\0';
|
||||
if (n == STRNZ)
|
||||
return t_wp[0][0] != '\0';
|
||||
if (n == FILTT)
|
||||
return isatty(getn(*t_wp));
|
||||
return filstat(*t_wp, n);
|
||||
}
|
||||
|
||||
t_lex(t_wp[1]);
|
||||
if (t_wp_op && t_wp_op->op_type == BINOP) {
|
||||
return binop();
|
||||
}
|
||||
|
||||
return t_wp[0][0] != '\0';
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 &&
|
||||
b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino);
|
||||
}
|
||||
*/
|
||||
|
||||
|
||||
static enum token t_lex(char *s)
|
||||
{
|
||||
const struct t_op *op;
|
||||
|
||||
t_wp_op = NULL;
|
||||
if (s == NULL) {
|
||||
return EOI;
|
||||
}
|
||||
|
||||
op = ops;
|
||||
do {
|
||||
if (strcmp(s, op->op_text) == 0) {
|
||||
t_wp_op = op;
|
||||
return op->op_num;
|
||||
}
|
||||
op++;
|
||||
} while (op < ops + ARRAY_SIZE(ops));
|
||||
|
||||
return OPERAND;
|
||||
}
|
||||
|
||||
|
||||
static int binop(void)
|
||||
{
|
||||
@ -381,6 +311,80 @@ static int binop(void)
|
||||
return 1; /* NOTREACHED */
|
||||
}
|
||||
|
||||
|
||||
static void initialize_group_array(void)
|
||||
{
|
||||
ngroups = getgroups(0, NULL);
|
||||
if (ngroups > 0) {
|
||||
/* FIXME: ash tries so hard to not die on OOM,
|
||||
* and we spoil it with just one xrealloc here */
|
||||
/* We realloc, because test_main can be entered repeatedly by shell.
|
||||
* Testcase (ash): 'while true; do test -x some_file; done'
|
||||
* and watch top. (some_file must have owner != you) */
|
||||
group_array = xrealloc(group_array, ngroups * sizeof(gid_t));
|
||||
getgroups(ngroups, group_array);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/* Return non-zero if GID is one that we have in our groups list. */
|
||||
//XXX: FIXME: duplicate of existing libbb function?
|
||||
// see toplevel TODO file:
|
||||
// possible code duplication ingroup() and is_a_group_member()
|
||||
static int is_a_group_member(gid_t gid)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Short-circuit if possible, maybe saving a call to getgroups(). */
|
||||
if (gid == getgid() || gid == getegid())
|
||||
return 1;
|
||||
|
||||
if (ngroups == 0)
|
||||
initialize_group_array();
|
||||
|
||||
/* Search through the list looking for GID. */
|
||||
for (i = 0; i < ngroups; i++)
|
||||
if (gid == group_array[i])
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/* Do the same thing access(2) does, but use the effective uid and gid,
|
||||
and don't make the mistake of telling root that any file is
|
||||
executable. */
|
||||
static int test_eaccess(char *path, int mode)
|
||||
{
|
||||
struct stat st;
|
||||
unsigned int euid = geteuid();
|
||||
|
||||
if (stat(path, &st) < 0)
|
||||
return -1;
|
||||
|
||||
if (euid == 0) {
|
||||
/* Root can read or write any file. */
|
||||
if (mode != X_OK)
|
||||
return 0;
|
||||
|
||||
/* Root can execute any file that has any one of the execute
|
||||
bits set. */
|
||||
if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (st.st_uid == euid) /* owner */
|
||||
mode <<= 6;
|
||||
else if (is_a_group_member(st.st_gid))
|
||||
mode <<= 3;
|
||||
|
||||
if (st.st_mode & mode)
|
||||
return 0;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
static int filstat(char *nm, enum token mode)
|
||||
{
|
||||
struct stat s;
|
||||
@ -453,147 +457,140 @@ static int filstat(char *nm, enum token mode)
|
||||
return 1; /* NOTREACHED */
|
||||
}
|
||||
|
||||
static enum token t_lex(char *s)
|
||||
{
|
||||
const struct t_op *op;
|
||||
|
||||
t_wp_op = NULL;
|
||||
if (s == NULL) {
|
||||
return EOI;
|
||||
static arith_t nexpr(enum token n)
|
||||
{
|
||||
if (n == UNOT)
|
||||
return !nexpr(t_lex(*++t_wp));
|
||||
return primary(n);
|
||||
}
|
||||
|
||||
|
||||
static arith_t aexpr(enum token n)
|
||||
{
|
||||
arith_t res;
|
||||
|
||||
res = nexpr(n);
|
||||
if (t_lex(*++t_wp) == BAND)
|
||||
return aexpr(t_lex(*++t_wp)) && res;
|
||||
t_wp--;
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
static arith_t oexpr(enum token n)
|
||||
{
|
||||
arith_t res;
|
||||
|
||||
res = aexpr(n);
|
||||
if (t_lex(*++t_wp) == BOR) {
|
||||
return oexpr(t_lex(*++t_wp)) || res;
|
||||
}
|
||||
t_wp--;
|
||||
return res;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static arith_t primary(enum token n)
|
||||
{
|
||||
arith_t res;
|
||||
|
||||
if (n == EOI) {
|
||||
syntax(NULL, "argument expected");
|
||||
}
|
||||
if (n == LPAREN) {
|
||||
res = oexpr(t_lex(*++t_wp));
|
||||
if (t_lex(*++t_wp) != RPAREN)
|
||||
syntax(NULL, "closing paren expected");
|
||||
return res;
|
||||
}
|
||||
if (t_wp_op && t_wp_op->op_type == UNOP) {
|
||||
/* unary expression */
|
||||
if (*++t_wp == NULL)
|
||||
syntax(t_wp_op->op_text, "argument expected");
|
||||
if (n == STREZ)
|
||||
return t_wp[0][0] == '\0';
|
||||
if (n == STRNZ)
|
||||
return t_wp[0][0] != '\0';
|
||||
if (n == FILTT)
|
||||
return isatty(getn(*t_wp));
|
||||
return filstat(*t_wp, n);
|
||||
}
|
||||
|
||||
op = ops;
|
||||
do {
|
||||
if (strcmp(s, op->op_text) == 0) {
|
||||
t_wp_op = op;
|
||||
return op->op_num;
|
||||
t_lex(t_wp[1]);
|
||||
if (t_wp_op && t_wp_op->op_type == BINOP) {
|
||||
return binop();
|
||||
}
|
||||
|
||||
return t_wp[0][0] != '\0';
|
||||
}
|
||||
|
||||
|
||||
int test_main(int argc, char **argv)
|
||||
{
|
||||
int res;
|
||||
const char *arg0;
|
||||
bool _off;
|
||||
|
||||
arg0 = bb_basename(argv[0]);
|
||||
if (arg0[0] == '[') {
|
||||
--argc;
|
||||
if (!arg0[1]) { /* "[" ? */
|
||||
if (NOT_LONE_CHAR(argv[argc], ']')) {
|
||||
bb_error_msg("missing ]");
|
||||
return 2;
|
||||
}
|
||||
} else { /* assuming "[[" */
|
||||
if (strcmp(argv[argc], "]]") != 0) {
|
||||
bb_error_msg("missing ]]");
|
||||
return 2;
|
||||
}
|
||||
}
|
||||
op++;
|
||||
} while (op < ops + ARRAY_SIZE(ops));
|
||||
|
||||
return OPERAND;
|
||||
}
|
||||
|
||||
/* atoi with error detection */
|
||||
//XXX: FIXME: duplicate of existing libbb function?
|
||||
static arith_t getn(const char *s)
|
||||
{
|
||||
char *p;
|
||||
#if ENABLE_FEATURE_TEST_64
|
||||
long long r;
|
||||
#else
|
||||
long r;
|
||||
#endif
|
||||
|
||||
errno = 0;
|
||||
#if ENABLE_FEATURE_TEST_64
|
||||
r = strtoll(s, &p, 10);
|
||||
#else
|
||||
r = strtol(s, &p, 10);
|
||||
#endif
|
||||
|
||||
if (errno != 0)
|
||||
syntax(s, "out of range");
|
||||
|
||||
if (*(skip_whitespace(p)))
|
||||
syntax(s, "bad number");
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* UNUSED
|
||||
static int newerf(const char *f1, const char *f2)
|
||||
{
|
||||
struct stat b1, b2;
|
||||
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 && b1.st_mtime > b2.st_mtime);
|
||||
}
|
||||
|
||||
static int olderf(const char *f1, const char *f2)
|
||||
{
|
||||
struct stat b1, b2;
|
||||
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 && b1.st_mtime < b2.st_mtime);
|
||||
}
|
||||
|
||||
static int equalf(const char *f1, const char *f2)
|
||||
{
|
||||
struct stat b1, b2;
|
||||
|
||||
return (stat(f1, &b1) == 0 &&
|
||||
stat(f2, &b2) == 0 &&
|
||||
b1.st_dev == b2.st_dev && b1.st_ino == b2.st_ino);
|
||||
}
|
||||
*/
|
||||
|
||||
/* Do the same thing access(2) does, but use the effective uid and gid,
|
||||
and don't make the mistake of telling root that any file is
|
||||
executable. */
|
||||
static int test_eaccess(char *path, int mode)
|
||||
{
|
||||
struct stat st;
|
||||
unsigned int euid = geteuid();
|
||||
|
||||
if (stat(path, &st) < 0)
|
||||
return -1;
|
||||
|
||||
if (euid == 0) {
|
||||
/* Root can read or write any file. */
|
||||
if (mode != X_OK)
|
||||
return 0;
|
||||
|
||||
/* Root can execute any file that has any one of the execute
|
||||
bits set. */
|
||||
if (st.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))
|
||||
return 0;
|
||||
argv[argc] = NULL;
|
||||
}
|
||||
|
||||
if (st.st_uid == euid) /* owner */
|
||||
mode <<= 6;
|
||||
else if (is_a_group_member(st.st_gid))
|
||||
mode <<= 3;
|
||||
res = setjmp(leaving);
|
||||
if (res)
|
||||
return res;
|
||||
|
||||
if (st.st_mode & mode)
|
||||
return 0;
|
||||
/* resetting ngroups is probably unnecessary. it will
|
||||
* force a new call to getgroups(), which prevents using
|
||||
* group data fetched during a previous call. but the
|
||||
* only way the group data could be stale is if there's
|
||||
* been an intervening call to setgroups(), and this
|
||||
* isn't likely in the case of a shell. paranoia
|
||||
* prevails...
|
||||
*/
|
||||
ngroups = 0;
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
static void initialize_group_array(void)
|
||||
{
|
||||
ngroups = getgroups(0, NULL);
|
||||
if (ngroups > 0) {
|
||||
/* FIXME: ash tries so hard to not die on OOM,
|
||||
* and we spoil it with just one xrealloc here */
|
||||
/* We realloc, because test_main can be entered repeatedly by shell.
|
||||
* Testcase (ash): 'while true; do test -x some_file; done'
|
||||
* and watch top. (some_file must have owner != you) */
|
||||
group_array = xrealloc(group_array, ngroups * sizeof(gid_t));
|
||||
getgroups(ngroups, group_array);
|
||||
}
|
||||
}
|
||||
|
||||
/* Return non-zero if GID is one that we have in our groups list. */
|
||||
//XXX: FIXME: duplicate of existing libbb function?
|
||||
// see toplevel TODO file:
|
||||
// possible code duplication ingroup() and is_a_group_member()
|
||||
static int is_a_group_member(gid_t gid)
|
||||
{
|
||||
int i;
|
||||
|
||||
/* Short-circuit if possible, maybe saving a call to getgroups(). */
|
||||
if (gid == getgid() || gid == getegid())
|
||||
/* Implement special cases from POSIX.2, section 4.62.4 */
|
||||
if (argc == 1)
|
||||
return 1;
|
||||
if (argc == 2)
|
||||
return *argv[1] == '\0';
|
||||
//assert(argc);
|
||||
/* remember if we saw argc==4 which wants *no* '!' test */
|
||||
_off = argc - 4;
|
||||
if (_off ?
|
||||
(LONE_CHAR(argv[1], '!'))
|
||||
: (argv[1][0] != '!' || argv[1][1] != '\0'))
|
||||
{
|
||||
if (argc == 3)
|
||||
return *argv[2] != '\0';
|
||||
|
||||
if (ngroups == 0)
|
||||
initialize_group_array();
|
||||
t_lex(argv[2 + _off]);
|
||||
if (t_wp_op && t_wp_op->op_type == BINOP) {
|
||||
t_wp = &argv[1 + _off];
|
||||
return binop() == _off;
|
||||
}
|
||||
}
|
||||
t_wp = &argv[1];
|
||||
res = !oexpr(t_lex(*t_wp));
|
||||
|
||||
/* Search through the list looking for GID. */
|
||||
for (i = 0; i < ngroups; i++)
|
||||
if (gid == group_array[i])
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
if (*t_wp != NULL && *++t_wp != NULL) {
|
||||
bb_error_msg("%s: unknown operand", *t_wp);
|
||||
return 2;
|
||||
}
|
||||
return res;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user