3rd-party/linux-kernel-module-cheat
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anonymous inode: move doc to readme

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This commit is contained in:
Ciro Santilli
2018-07-01 16:10:29 +01:00
parent 662d4f25a1
commit 923f655811
6 changed files with 50 additions and 24 deletions
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16
kernel_module/user/anonymous_inode.c
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@@ -14,10 +14,15 @@ int main(int argc, char **argv)
{
char buf[1024];
int fd_ioctl, fd_ioctl_anon, ret;
size_t i, nreads;
if (argc < 2) {
puts("Usage: ./prog <ioctl-file>");
puts("Usage: ./prog <ioctl-file> [<nreads>]");
return EXIT_FAILURE;
} else if (argc > 2) {
nreads = strtol(argv[2], NULL, 10);
} else {
nreads = 3;
}
fd_ioctl = open(argv[1], O_RDONLY);
if (fd_ioctl == -1) {
@@ -29,11 +34,10 @@ int main(int argc, char **argv)
perror("ioctl");
return EXIT_FAILURE;
}
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
sleep(1);
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
for (i = 0; i < nreads; ++i) {
ret = read(fd_ioctl_anon, buf, sizeof(buf));
printf("%.*s\n", ret, buf);
}
close(fd_ioctl_anon);
close(fd_ioctl);
return EXIT_SUCCESS;