89 lines
1.6 KiB
C
89 lines
1.6 KiB
C
/* A simple program to check which file descriptors are open and
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* print some info about them.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <sys/types.h>
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif /* HAVE_STDLIB_H */
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif /* HAVE_UNISTD_H */
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#ifdef HAVE_FCNTL_H
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# include <fcntl.h>
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#else /* HAVE_FCNTL_H */
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# include <sys/file.h>
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#endif /* HAVE_FCNTL_H */
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#include "ksh_stat.h"
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int usage();
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char *progname = "check-fd";
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#define MAXFD 256 /* a somewhat arbitrary number */
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int
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main(argc, argv)
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int argc;
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char **argv;
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{
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extern int optind;
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int opt;
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int do_close = 0;
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struct stat statb;
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int i;
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if (argc > 0 && argv[0] && *argv[0])
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progname = argv[0];
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while ((opt = getopt(argc, argv, "c")) != EOF) {
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switch (opt) {
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case 'c':
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do_close = 1;
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break;
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default:
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usage(1);
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}
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}
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if (optind != argc) {
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fprintf(stderr, "%s: too many arguments\n", progname);
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usage(0);
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}
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if (do_close) {
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for (i = 0; i < MAXFD; i++)
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if (i == 1)
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printf("(can't check 1)\n");
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else if (close(i) >= 0)
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printf("%d was open\n", i);
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} else {
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for (i = 0; i < MAXFD; i++)
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if (fstat(i, &statb) == 0)
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printf(
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"%d is open (dev/inode %hd/%ld, flags 0x%x)\n",
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i, statb.st_dev, statb.st_ino,
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fcntl(i, F_GETFL, 0));
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}
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return 0;
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}
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int
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usage(verbose)
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int verbose;
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{
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fprintf(stderr, "Usage: %s [-?c]\n", progname);
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if (verbose)
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fprintf(stderr, "\
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-c use close(2) instead of fstat(2) to check for open fds\n\
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(prints dev, inode and fcntl(F_GETFL) flags)\n\
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");
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exit(1);
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return 0;
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}
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