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