1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
/* 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 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);
}
static int (*testmap[])(char *) = {
test_b,
test_c,
test_d,
test_e,
test_f,
test_g,
test_h,
test_k,
test_p,
test_r,
test_S,
test_s,
test_t,
test_u,
test_w,
test_x
};
static void
usage(void)
{
fprintf(stderr, "usage: %s [-0bcdefghkLprSstuwx] file ...\n", argv0);
exit(1);
}
static void
test(char *s)
{
long int i, j;
for (i = 0; j = 1L << i, j <= tests; i++) {
if ((tests & j) && testmap[i](s)) {
printf("%s%c", s, delim);
fflush(stdout);
break;
}
}
}
int
main(int argc, char *argv[])
{
char *line = NULL;
size_t size = 0;
ssize_t len;
ARGBEGIN {
case '0':
delim = '\0';
break;
case 'b': tests |= 1 << 0; break;
case 'c': tests |= 1 << 1; break;
case 'd': tests |= 1 << 2; break;
case 'e': tests |= 1 << 3; break;
case 'f': tests |= 1 << 4; break;
case 'g': tests |= 1 << 5; break;
case 'h': tests |= 1 << 6; break;
case 'k': tests |= 1 << 7; break;
case 'L': tests |= 1 << 6; break;
case 'p': tests |= 1 << 8; break;
case 'r': tests |= 1 << 9; break;
case 'S': tests |= 1 << 10; break;
case 's': tests |= 1 << 11; break;
case 't': tests |= 1 << 12; break;
case 'u': tests |= 1 << 13; break;
case 'w': tests |= 1 << 14; break;
case 'x': tests |= 1 << 15; break;
default:
usage();
} ARGEND;
if (!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", strerror(errno));
return 1;
}
}
if (ferror(stdout)) {
fprintf(stderr, "%s: <stdout>: %s\n", strerror(errno));
return 1;
}
return 0;
}
|
