363 lines
9.2 KiB
C
Executable File
363 lines
9.2 KiB
C
Executable File
/* stat.c Feb 1987 - main, printit, statit
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*
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* stat - a program to perform what the stat(2) call does.
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*
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* usage: stat [-] [-all] -<field> [-<field> ...] [file1 file2 file3 ...]
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*
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* where <field> is one of the struct stat fields without the leading "st_".
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* The three times can be printed out as human times by requesting
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* -Ctime instead of -ctime (upper case 1st letter).
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* - means take the file names from stdin.
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* -0.. means fd0..
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* no files means all fds.
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*
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* output: if only one field is specified, that fields' contents are printed.
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* if more than one field is specified, the output is
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* file filed1: f1val, field2: f2val, etc
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*
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* written: Larry McVoy, (mcvoy@rsch.wisc.edu)
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*/
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# define ALLDEF /* Make -all default. (kjb) */
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# include <sys/types.h>
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# include <errno.h>
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# include <limits.h>
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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# include <time.h>
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# include <sys/stat.h>
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# define addr(x) ((void*) &sbuf.x)
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# define size(x) sizeof(sbuf.x)
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# define equal(s, t) (strcmp(s, t) == 0)
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# ifndef PATH_MAX
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# define PATH_MAX 1024
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# endif
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# undef LS_ADDS_SPACE /* AT&T Unix PC, ls prints "file[* /]" */
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/* This makes stat fail. */
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# ifndef _MINIX /* All but Minix have u_* and st_blocks */
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# define BSD
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# endif
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# ifndef S_IREAD
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# define S_IREAD S_IRUSR
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# define S_IWRITE S_IWUSR
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# define S_IEXEC S_IXUSR
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# endif
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char * arg0;
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struct stat sbuf;
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extern int errno;
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int first_file= 1;
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#ifndef S_IFLNK
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#define lstat stat
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#endif
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struct field {
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char* f_name; /* field name in stat */
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u_char* f_addr; /* address of the field in sbuf */
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u_short f_size; /* size of the object, needed for pointer arith */
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u_short f_print; /* show this field? */
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} fields[] = {
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{ "dev", addr(st_dev), size(st_dev), 0 },
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{ "ino", addr(st_ino), size(st_ino), 0 },
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{ "mode", addr(st_mode), size(st_mode), 0 },
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{ "nlink", addr(st_nlink), size(st_nlink), 0 },
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{ "uid", addr(st_uid), size(st_uid), 0 },
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{ "gid", addr(st_gid), size(st_gid), 0 },
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{ "rdev", addr(st_rdev), size(st_rdev), 0 },
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{ "size", addr(st_size), size(st_size), 0 },
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{ "Atime", addr(st_atime), size(st_atime), 0 },
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{ "atime", addr(st_atime), size(st_atime), 0 },
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{ "Mtime", addr(st_mtime), size(st_mtime), 0 },
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{ "mtime", addr(st_mtime), size(st_mtime), 0 },
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{ "Ctime", addr(st_ctime), size(st_ctime), 0 },
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{ "ctime", addr(st_ctime), size(st_ctime), 0 },
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# ifdef BSD
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{ "blksize", addr(st_blksize), size(st_blksize), 0 },
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{ "blocks", addr(st_blocks), size(st_blocks), 0 },
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# endif
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{ NULL, 0, 0, 0 },
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};
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void printstat(struct stat *sbuf, int nprint);
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void printit(struct stat* sb, struct field* f, int n);
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void rwx(mode_t mode, char *bit);
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void usage(void);
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int main(int ac, char** av)
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{
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int i, j, nprint = 0, files = 0;
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char buf[PATH_MAX], *check;
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int sym=0, ret=0, from_stdin = 0;
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int err;
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u_long fd;
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if ((arg0 = strrchr(av[0], '/')) == NULL) arg0 = av[0]; else arg0++;
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#ifdef S_IFLNK
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if (equal(arg0, "lstat")) sym = 1;
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#endif
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if (ac > 1 && equal(av[i = 1], "-"))
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i++, from_stdin++;
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for (i= 1; i<ac; i++) {
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if (av[i][0] == '-') {
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if (equal(av[i], "-")) {
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from_stdin= 1;
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files++;
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continue;
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}
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if (equal("-all", av[i])) {
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for (j=0; fields[j].f_name; j++)
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nprint++, fields[j].f_print++;
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continue;
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}
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if (equal("-s", av[i])) {
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#ifdef S_IFLNK
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sym=1;
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#endif
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continue;
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}
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fd = strtoul(av[i]+1, &check, 0);
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if (check != av[i]+1 && *check == '\0')
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{
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files++;
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continue;
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}
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for (j=0; fields[j].f_name; j++)
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if (equal(fields[j].f_name, &av[i][1])) {
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nprint++, fields[j].f_print++;
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break;
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}
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if (!fields[j].f_name) {
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if (!equal("-?", av[i])) {
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fprintf(stderr, "stat: %s: bad field\n", av[i]);
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}
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usage();
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}
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}
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else
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files++;
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}
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if (!nprint) {
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# ifndef ALLDEF
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usage();
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# else
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for (j=0; fields[j].f_name; j++)
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nprint++, fields[j].f_print++;
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# endif
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}
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if (from_stdin)
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files++; /* We don't know how many files come from stdin. */
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if (files == 0) { /* Stat all file descriptors. */
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for (i= 0; i<OPEN_MAX; i++) {
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err= fstat(i, &sbuf);
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if (err == -1 && errno == EBADF)
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continue;
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if (err == 0) {
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if (!first_file) fputc('\n', stdout);
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printf("fd %d:\n", i);
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printstat(&sbuf, nprint);
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}
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else {
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fprintf(stderr, "%s: fd %d: %s\n", arg0, i, strerror(errno));
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ret= 1;
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}
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}
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exit(ret);
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}
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for (i=1; i<ac; i++) {
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if (equal(av[i], "-")) {
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while (fgets(buf, sizeof(buf), stdin)) {
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char *p= strchr(buf, '\n');
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if (p) *p= 0;
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if (!sym) err= stat(av[i], &sbuf);
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if (sym || (err != 0 && errno == ENOENT)) {
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err= lstat(av[i], &sbuf);
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}
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if (err == -1) {
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fprintf(stderr, "%s: %s: %s\n",
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arg0, av[i], strerror(errno));
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ret= 1;
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}
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else {
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if (!first_file) fputc('\n', stdout);
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printf("%s:\n", buf);
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printstat(&sbuf, nprint);
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}
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}
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continue;
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}
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if (av[i][0] == '-') {
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fd= strtoul(av[i]+1, &check, 10);
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if (check == av[i]+1 || *check != '\0') continue;
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if (fd >= INT_MAX) {
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err= -1;
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errno= EBADF;
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}
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else {
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err= fstat((int) fd, &sbuf);
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}
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if (err != -1) {
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if (!first_file) fputc('\n', stdout);
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if (files != 1) printf("fd %lu:\n", fd);
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printstat(&sbuf, nprint);
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}
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else {
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fprintf(stderr, "fd %lu: %s\n", fd, strerror(errno));
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ret= 1;
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}
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continue;
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}
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if (!sym) err= stat(av[i], &sbuf);
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if (sym || (err != 0 && errno == ENOENT)) err= lstat(av[i], &sbuf);
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if (err != -1) {
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if (!first_file) fputc('\n', stdout);
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if (files != 1) printf("%s:\n", av[i]);
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printstat(&sbuf, nprint);
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}
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else {
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fprintf(stderr, "%s: %s: %s\n", arg0, av[i], strerror(errno));
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ret= 1;
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}
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}
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exit(ret);
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}
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/*------------------------------------------------------------------30/Jan/87-*
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* printstat(file, nprint) - do the work
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*----------------------------------------------------------------larry mcvoy-*/
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void printstat(struct stat *sbuf, int nprint)
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{
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int j;
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int first_field= 1;
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for (j=0; fields[j].f_name; j++) {
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if (fields[j].f_print) {
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if (!first_field) fputc('\n', stdout);
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printit(sbuf, &fields[j], nprint);
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first_field= 0;
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}
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}
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fputc('\n', stdout);
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first_file= 0;
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}
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/*------------------------------------------------------------------30/Jan/87-*
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* printit(sb, f, n) - print the field
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*
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* Inputs -> (struct stat*), (struct field*), (int)
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*
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* Results -> Displays the field, with special handling of weird fields like
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* mode and mtime. The mode field is dumped in octal, followed
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* by one or more of the S_IF<X> and/or S_I<X> values.
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*----------------------------------------------------------------larry mcvoy-*/
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void printit(struct stat* sb, struct field* f, int n)
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{
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if (n > 1)
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printf("%s: ", f->f_name);
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if (equal(f->f_name, "mode")) {
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/* This lot changed to my personal liking. (kjb) */
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char bit[11];
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printf("%07lo, ", (u_long) sb->st_mode);
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strcpy(bit, "----------");
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switch (sb->st_mode&S_IFMT) {
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case S_IFDIR: bit[0]='d'; break;
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# ifdef S_IFFIFO
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case S_IFFIFO: bit[0]='p'; break;
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# endif
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case S_IFCHR: bit[0]='c'; break;
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case S_IFBLK: bit[0]='b'; break;
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# ifdef S_IFSOCK
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case S_IFSOCK: bit[0]='S'; break;
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# endif
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# ifdef S_IFMPC
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case S_IFMPC: bit[0]='C'; break;
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# endif
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# ifdef S_IFMPB
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case S_IFMPB: bit[0]='B'; break;
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# endif
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# ifdef S_IFLNK
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case S_IFLNK: bit[0]='l'; break;
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# endif
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}
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rwx(sb->st_mode, bit+1);
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rwx(sb->st_mode<<3, bit+4);
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rwx(sb->st_mode<<6, bit+7);
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if (sb->st_mode&S_ISUID) bit[3]='s';
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if (sb->st_mode&S_ISGID) bit[6]='s';
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if (sb->st_mode&S_ISVTX) bit[9]='t';
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printf("\"%s\"", bit);
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}
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/* times in human form, uppercase first letter */
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else if (equal("Ctime", f->f_name)) {
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printf("%.24s (%lu)", ctime(&sb->st_ctime), (u_long) sb->st_ctime);
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f[1].f_print= 0;
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}
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else if (equal("Mtime", f->f_name)) {
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printf("%.24s (%lu)", ctime(&sb->st_mtime), (u_long) sb->st_mtime);
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f[1].f_print= 0;
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}
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else if (equal("Atime", f->f_name)) {
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printf("%.24s (%lu)", ctime(&sb->st_atime), (u_long) sb->st_atime);
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f[1].f_print= 0;
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}
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else if (equal("ctime", f->f_name)) {
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printf("%lu", (u_long) sb->st_ctime);
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}
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else if (equal("mtime", f->f_name)) {
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printf("%lu", (u_long) sb->st_mtime);
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}
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else if (equal("atime", f->f_name)) {
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printf("%lu", (u_long) sb->st_atime);
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}
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else {
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switch (f->f_size) {
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case sizeof(char):
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printf("%d", * (u_char *) f->f_addr);
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break;
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case sizeof(short):
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printf("%u", (u_int) * (u_short *) f->f_addr);
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break;
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#if INT_MAX != SHRT_MAX
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case sizeof(int):
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printf("%u", * (u_int *) f->f_addr);
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break;
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#endif
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#if LONG_MAX != INT_MAX && LONG_MAX != SHRT_MAX
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case sizeof(long):
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printf("%lu", * (u_long *) f->f_addr);
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break;
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#endif
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default:
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fprintf(stderr, "\nProgram error: bad '%s' field size %d\n",
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f->f_name, f->f_size);
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break;
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}
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}
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}
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void rwx(mode_t mode, char *bit)
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{
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if (mode&S_IREAD) bit[0]='r';
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if (mode&S_IWRITE) bit[1]='w';
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if (mode&S_IEXEC) bit[2]='x';
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}
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void usage(void)
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{
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fprintf(stderr,
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"Usage: %s [-] [-fd] [-all] [-s] [-field ...] [file1 ...]\n",
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arg0);
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exit(1);
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}
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