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