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/*
Copyright (C) 2008, 2009, 2010 Jiri Olsa <olsajiri@gmail.com>
This file is part of the latrace.
The latrace 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 3 of the License, or
(at your option) any later version.
The latrace is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the latrace (file COPYING). If not, see
<http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <unistd.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <sys/inotify.h>
#include "config.h"
static char *get_notify_dir(char *dir)
{
static char notify_dir[LT_MAXFILE];
static int initialized = 0;
int s;
if (initialized)
return notify_dir;
s = snprintf(notify_dir, LT_MAXFILE, "%s/fifo", dir);
if (s >= LT_MAXFILE)
return NULL;
initialized = 1;
return notify_dir;
}
int lt_fifo_create(struct lt_config_audit *cfg, char *dir)
{
int fd;
char fifo[100];
sprintf(fifo, "%s/fifo-%d", get_notify_dir(dir),
(pid_t) syscall(SYS_gettid));
if (-1 == mkfifo(fifo, 0666)) {
perror("mkfifo failed");
return -1;
}
if (-1 == (fd = open(fifo, O_WRONLY))) {
perror("open fifo failed");
return -1;
}
return fd;
}
int lt_fifo_open(struct lt_config_app *cfg, char *dir, char *name)
{
int fd;
char str_fifo[LT_MAXFILE];
snprintf(str_fifo, LT_MAXFILE, "%s/%s", get_notify_dir(dir), name);
PRINT_VERBOSE(cfg, 1, "opening fifo: %s\n", str_fifo);
if (-1 == (fd = open(str_fifo, O_RDONLY)))
perror("open fifo failed");
PRINT_VERBOSE(cfg, 1, "pipe openned fd: %d\n", fd);
return fd;
}
int lt_fifo_notify_fd(struct lt_config_app *cfg, char *dir)
{
int fd;
char *notify_dir = get_notify_dir(dir);
struct stat st;
if (stat(notify_dir, &st)) {
if (mkdir(notify_dir, S_IRWXU)) {
perror("mkdir failed");
return -1;
}
if (stat(notify_dir, &st)) {
perror("stat failed");
return -1;
}
}
if (!S_ISDIR(st.st_mode)) {
PRINT_VERBOSE(cfg, 1, "WTF '%s' is not a directory..\n",
notify_dir);
return -1;
}
if (-1 == (fd = inotify_init())) {
perror("inotify_init failed");
return -1;
}
if (-1 == inotify_add_watch(fd, notify_dir, IN_CREATE)) {
perror("inotify_add_watch failed");
return -1;
}
PRINT_VERBOSE(cfg, 1, "fifo notification set to: %s\n", notify_dir);
return fd;
}
int lt_fifo_send(struct lt_config_audit *cfg, int fd, char *buf, int len)
{
static unsigned int written = 0;
if (-1 == write(fd, buf, len)) {
perror("write failed");
return -1;
}
written += len;
PRINT_VERBOSE(cfg, 1, "sending %d, total %u\n",
len, written);
return 0;
}
int lt_fifo_recv(struct lt_config_app *cfg, struct lt_thread *t, void *buf,
int bufsize)
{
static unsigned int red = 0;
ssize_t size;
struct lt_fifo_mbase *h = buf;
if (-1 == (size = read(t->fifo_fd, h, sizeof(struct lt_fifo_mbase)))) {
perror("read failed");
return -1;
}
if (size == 0)
return -1;
red += size;
PRINT_VERBOSE(cfg, 1, "received %d\n", h->len);
if ((size + h->len) > bufsize) {
printf("thread %d - buffer max size reached\n", t->tid);
return -1;
}
if (-1 == (size = read(t->fifo_fd, buf + sizeof(*h), h->len))) {
perror("read failed");
return -1;
}
red += size;
PRINT_VERBOSE(cfg, 1, "received %d, total %u\n",
size + sizeof(*h), red);
return 0;
}
int lt_fifo_msym_get(struct lt_config_audit *cfg, char *buf, int type,
struct timeval *tv, char *symname, char *libto,
char *arg, char *argd)
{
struct lt_fifo_msym *m = (struct lt_fifo_msym*) buf;
int len_data, len = sizeof(struct lt_fifo_msym);
/* TODO need proper buf size checking */
m->h.type = type;
m->h.tid = (pid_t) syscall(SYS_gettid);
m->h.tv = *tv;
m->sym = 0;
m->lib = strlen(symname);
m->arg = m->lib + strlen(libto) + 1;
m->argd = m->arg + strlen(arg) + 1;
len_data = sprintf(m->data, "%s %s %s %s", symname, libto, arg, argd);
m->data[m->lib++] = 0x0;
m->data[m->arg++] = 0x0;
m->data[m->argd++] = 0x0;
m->data[len_data++] = 0x0;
len += len_data;
m->h.len = len_data + (sizeof(*m) - sizeof(struct lt_fifo_mbase));
PRINT_VERBOSE(cfg, 1, "sending data %d <%s> <%s> <%s> <%s>\n",
m->h.len,
m->data + m->sym,
m->data + m->lib,
m->data + m->arg,
m->data + m->argd);
return len;
}
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