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/* See LICENSE file for copyright and license details. */
#include <sys/stat.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "arg.h"
char *argv0;
static char delim = '\n';
static long int pos_tests = 0;
static long int neg_tests = 0;
static int test_b(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISBLK (buf.st_mode); }
static int test_c(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISCHR (buf.st_mode); }
static int test_d(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISDIR (buf.st_mode); }
static int test_f(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISREG (buf.st_mode); }
static int test_g(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISGID & buf.st_mode ; }
static int test_h(char *s) { struct stat buf; if (lstat(s, &buf)) return 0; return S_ISLNK (buf.st_mode); }
static int test_k(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISVTX & buf.st_mode ; }
static int test_p(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISFIFO (buf.st_mode); }
static int test_S(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISSOCK (buf.st_mode); }
static int test_s(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return buf.st_size ; }
static int test_u(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISUID & buf.st_mode ; }
static int test_e(char *s) { return !faccessat(AT_FDCWD, s, F_OK, AT_EACCESS); }
static int test_r(char *s) { return !faccessat(AT_FDCWD, s, R_OK, AT_EACCESS); }
static int test_w(char *s) { return !faccessat(AT_FDCWD, s, W_OK, AT_EACCESS); }
static int test_x(char *s) { return !faccessat(AT_FDCWD, s, X_OK, AT_EACCESS); }
static int
test_t(char *s)
{
long int fd;
char *end;
errno = 0;
fd = strtol(s, &end, 10);
if (errno || *end || fd < 0 || fd > INT_MAX)
return 0;
return isatty((int)fd);
}
#define LIST_TESTS\
X('b', test_b, 0)\
X('c', test_c, 1)\
X('d', test_d, 2)\
X('e', test_e, 3)\
X('f', test_f, 4)\
X('g', test_g, 5)\
X('h', test_h, 6)\
X('k', test_k, 7)\
X('p', test_p, 8)\
X('r', test_r, 9)\
X('S', test_S, 10)\
X('s', test_s, 11)\
X('t', test_t, 12)\
X('u', test_u, 13)\
X('w', test_w, 14)\
X('x', test_x, 15)
#define LIST_SYNONYMS\
X('L', test_h, 6)
static int (*testmap[])(char *) = {
#define X(FLAG, FUNC, NUM) FUNC,
LIST_TESTS
#undef X
};
static void
usage(void)
{
fprintf(stderr, "usage: %s [-0bcdefghkLprSstuwx] [+bcdefghkLprSstuwx] [file ...]\n", argv0);
exit(1);
}
static void
test(char *s)
{
long int i, j;
for (i = 0; j = 1L << i, j <= pos_tests; i++) {
if ((pos_tests & j) && testmap[i](s)) {
printf("%s%c", s, delim);
fflush(stdout);
return;
}
}
for (i = 0; j = 1L << i, j <= neg_tests; i++) {
if ((neg_tests & j) && !testmap[i](s)) {
printf("%s%c", s, delim);
fflush(stdout);
return;
}
}
}
int
main(int argc, char *argv[])
{
char *line = NULL;
size_t size = 0;
ssize_t len;
ARGBEGIN {
case '0':
delim = '\0';
break;
#define X(FLAG, FUNC, NUM)\
case FLAG: pos_tests |= 1 << NUM; break;
LIST_TESTS
LIST_SYNONYMS
#undef X
default:
usage();
} ARGALT('+') {
#define X(FLAG, FUNC, NUM)\
case FLAG: neg_tests |= 1 << NUM; break;
LIST_TESTS
LIST_SYNONYMS
#undef X
default:
usage();
} ARGEND;
if (!pos_tests && !neg_tests) {
fprintf(stderr, "%s: at least one test is required\n", argv0);
return 1;
}
if (argc) {
for (; *argv; argv++)
test(*argv);
} else {
while (len = getdelim(&line, &size, delim, stdin), len >= 0) {
if (len && line[len - 1] == delim)
line[len - 1] = '\0';
test(line);
}
if (ferror(stdin)) {
fprintf(stderr, "%s: <stdin>: %s\n", argv0, strerror(errno));
return 1;
}
}
if (ferror(stdout)) {
fprintf(stderr, "%s: <stdout>: %s\n", argv0, strerror(errno));
return 1;
}
return 0;
}
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