160 lines
4.3 KiB
C
160 lines
4.3 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <sys/stat.h>
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#include <string.h>
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#include <unistd.h>
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#include "utf.h"
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#include "util.h"
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#define STOI(s) enstrtonum(2, s, LLONG_MIN, LLONG_MAX)
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static int unary_b(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISBLK (buf.st_mode); }
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static int unary_c(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISCHR (buf.st_mode); }
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static int unary_d(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISDIR (buf.st_mode); }
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static int unary_f(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISREG (buf.st_mode); }
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static int unary_g(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISGID & buf.st_mode ; }
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static int unary_h(char *s) { struct stat buf; if (lstat(s, &buf)) return 0; return S_ISLNK (buf.st_mode); }
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static int unary_p(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISFIFO (buf.st_mode); }
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static int unary_S(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISSOCK (buf.st_mode); }
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static int unary_s(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return buf.st_size ; }
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static int unary_u(char *s) { struct stat buf; if ( stat(s, &buf)) return 0; return S_ISUID & buf.st_mode ; }
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static int unary_n(char *s) { return utflen(s); }
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static int unary_z(char *s) { return !utflen(s); }
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static int unary_e(char *s) { return access(s, F_OK); }
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static int unary_r(char *s) { return access(s, R_OK); }
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static int unary_w(char *s) { return access(s, W_OK); }
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static int unary_x(char *s) { return access(s, X_OK); }
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static int unary_t(char *s) { int fd = enstrtonum(2, s, 0, INT_MAX); return isatty(fd); }
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static int binary_se(char *s1, char *s2) { return strcmp(s1, s2) == 0; }
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static int binary_sn(char *s1, char *s2) { return strcmp(s1, s2) != 0; }
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static int binary_eq(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a == b; }
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static int binary_ne(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a != b; }
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static int binary_gt(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a > b; }
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static int binary_ge(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a >= b; }
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static int binary_lt(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a < b; }
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static int binary_le(char *s1, char *s2) { long long a = STOI(s1), b = STOI(s2); return a <= b; }
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struct test {
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char *name;
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int (*func)();
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};
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static struct test unary[] = {
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{ "-b", unary_b },
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{ "-c", unary_c },
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{ "-d", unary_d },
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{ "-e", unary_e },
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{ "-f", unary_f },
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{ "-g", unary_g },
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{ "-h", unary_h },
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{ "-L", unary_h },
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{ "-n", unary_n },
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{ "-p", unary_p },
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{ "-r", unary_r },
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{ "-S", unary_S },
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{ "-s", unary_s },
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{ "-t", unary_t },
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{ "-u", unary_u },
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{ "-w", unary_w },
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{ "-x", unary_x },
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{ "-z", unary_z },
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{ NULL, NULL },
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};
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static struct test binary[] = {
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{ "=" , binary_se },
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{ "!=" , binary_sn },
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{ "-eq", binary_eq },
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{ "-ne", binary_ne },
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{ "-gt", binary_gt },
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{ "-ge", binary_ge },
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{ "-lt", binary_lt },
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{ "-le", binary_le },
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{ NULL, NULL },
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};
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static struct test *
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find_test(struct test *tests, char *name)
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{
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struct test *t;
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for (t = tests; t->name; ++t)
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if (strcmp(t->name, name) == 0)
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return t;
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return NULL;
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}
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static int
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noarg(char **argv)
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{
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return 0;
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}
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static int
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onearg(char **argv)
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{
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return strlen(argv[0]);
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}
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static int
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twoarg(char **argv)
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{
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struct test *t = find_test(unary, *argv);
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if (strcmp(argv[0], "!") == 0)
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return !onearg(argv + 1);
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if (t)
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return t->func(argv[1]);
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return enprintf(2, "bad unary test %s\n", argv[0]), 0;
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}
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static int
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threearg(char **argv)
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{
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struct test *t = find_test(binary, argv[1]);
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if (t)
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return t->func(argv[0], argv[2]);
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if (strcmp(argv[0], "!") == 0)
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return !twoarg(argv + 1);
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return enprintf(2, "bad binary test %s\n", argv[1]), 0;
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}
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static int
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fourarg(char **argv)
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{
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if (strcmp(argv[0], "!") == 0)
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return !threearg(argv + 1);
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return enprintf(2, "too many arguments\n"), 0;
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}
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int
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main(int argc, char **argv)
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{
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int (*narg[])(char**) = { noarg, onearg, twoarg, threearg, fourarg };
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size_t len = strlen(argv[0]);
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if (len && argv[0][len - 1] == '[' && strcmp(argv[--argc], "]") != 0)
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enprintf(2, "no matching ]\n");
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--argc; ++argv;
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if (argc > 4)
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enprintf(2, "too many arguments\n");
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return !narg[argc](argv);
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}
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