95 lines
1.7 KiB
C
95 lines
1.7 KiB
C
/*
|
|
* demo.c - Fakefile demo
|
|
*
|
|
* Copyright 2012 by Werner Almesberger
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "fakefile.h"
|
|
|
|
|
|
static void usage(const char *name)
|
|
{
|
|
fprintf(stderr,
|
|
"usage: %s command [arg ...]\n"
|
|
" %s -e path errno command\n"
|
|
" %s -f path content command\n",
|
|
name, name, name);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct fakefile *ff;
|
|
struct fakefile_event *ev;
|
|
int error = 0;
|
|
const char *path = NULL, *fake = NULL;
|
|
char *end;
|
|
|
|
if (argc == 1)
|
|
usage(*argv);
|
|
if (*argv[1] == '-') {
|
|
if (argc < 5)
|
|
usage(*argv);
|
|
path = argv[2];
|
|
switch (argv[1][1]) {
|
|
case 'e':
|
|
error = strtoul(argv[3], &end, 0);
|
|
if (*end)
|
|
usage(*argv);
|
|
break;
|
|
case 'f':
|
|
fake = argv[3];
|
|
break;
|
|
default:
|
|
usage(*argv);
|
|
}
|
|
argv += 3;
|
|
}
|
|
ff = fakefile_execv(argv[1], argv+1);
|
|
while (1) {
|
|
ev = fakefile_poll();
|
|
switch (ev->type) {
|
|
case ff_et_open:
|
|
fprintf(stderr, "\"%s\"\n", ev->u.open.name);
|
|
if (path && !strcmp(ev->u.open.name, path)) {
|
|
if (!fake)
|
|
ev->u.open.res = -error;
|
|
} else {
|
|
ev->u.open.res = 0;
|
|
}
|
|
break;
|
|
case ff_et_read: {
|
|
size_t len, left;
|
|
|
|
len = ev->u.read.len;
|
|
left = strlen(fake);
|
|
if (len > left)
|
|
len = left;
|
|
ev->u.read.buf = (void *) fake;
|
|
ev->u.read.len = len;
|
|
fake += len;
|
|
break;
|
|
}
|
|
case ff_et_exit:
|
|
goto out;
|
|
default:
|
|
break;
|
|
}
|
|
fakefile_respond(ev);
|
|
}
|
|
out:
|
|
fakefile_end(ff);
|
|
return 0;
|
|
}
|