54 lines
982 B
C
54 lines
982 B
C
#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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/* backward compat in case it's not defined */
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#ifndef O_TMPFILE
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#define O_TMPFILE (020000000|O_DIRECTORY)
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#endif
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/*
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* DESCRIPTION:
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* Check if the kernel support O_TMPFILE.
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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 fd;
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struct stat buf;
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if (argc < 2) {
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fprintf(stderr, "Usage: %s dir\n", argv[0]);
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return (2);
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}
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if (stat(argv[1], &buf) < 0) {
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perror("stat");
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return (2);
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}
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if (!S_ISDIR(buf.st_mode)) {
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fprintf(stderr, "\"%s\" is not a directory\n", argv[1]);
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return (2);
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}
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fd = open(argv[1], O_TMPFILE | O_WRONLY, 0666);
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if (fd < 0) {
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if (errno == EISDIR) {
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fprintf(stderr,
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"The kernel doesn't support O_TMPFILE\n");
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return (1);
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} else if (errno == EOPNOTSUPP) {
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fprintf(stderr,
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"The filesystem doesn't support O_TMPFILE\n");
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return (2);
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}
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perror("open");
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} else {
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close(fd);
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}
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return (0);
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}
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