d974f67a52
Test that reads from a newly-created efivarfs file (with no data written) will return EOF. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Cc: Matt Fleming <matt.fleming@intel.com> Cc: Lingzhu Xiang <lxiang@redhat.com> Cc: Dave Young <dyoung@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
38 lines
679 B
C
38 lines
679 B
C
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
const char *path;
|
|
char buf[4];
|
|
int fd, rc;
|
|
|
|
if (argc < 2) {
|
|
fprintf(stderr, "usage: %s <path>\n", argv[0]);
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
path = argv[1];
|
|
|
|
/* create a test variable */
|
|
fd = open(path, O_RDWR | O_CREAT, 0600);
|
|
if (fd < 0) {
|
|
perror("open(O_WRONLY)");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
rc = read(fd, buf, sizeof(buf));
|
|
if (rc != 0) {
|
|
fprintf(stderr, "Reading a new var should return EOF\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|