int open(const char *path, int flags, ...)
{
va_list ap;
int fd;
int mode;
typeof(open) *original_open = dlsym(RTLD_NEXT, "open");
va_start(ap, flags);
mode = va_arg(ap, int);
va_end(ap);
debug(D_DEBUG, "open from %d.\n", getpid());
fd = original_open(path, flags, mode);
if(fd > -1)
{
struct monitor_msg msg;
msg.type = OPEN;
msg.origin = getpid();
strcpy(msg.data.s, path);
send_monitor_msg(&msg);
}
return fd;
}
int request_snapshot(struct rmonitor_file_watch_info *f) {
const char *label = construct_label(f);
if(!label) {
//no snapshot to request
return 0;
}
struct rmonitor_msg msg;
bzero(&msg, sizeof(msg));
msg.type = SNAPSHOT;
msg.error = 0;
msg.origin = -1;
strncpy(msg.data.s, label, sizeof(msg.data.s) - 1);
int status = send_monitor_msg(&msg);
return status;
}
pid_t fork()
{
pid_t pid;
typeof(fork) *original_fork = dlsym(RTLD_NEXT, "fork");
debug(D_DEBUG, "fork from %d.\n", getpid());
pid = original_fork();
if(!pid)
{
struct monitor_msg msg;
msg.type = BRANCH;
msg.origin = getpid();
msg.data.p = getppid();
send_monitor_msg(&msg);
}
return pid;
}
FILE *fopen(const char *path, const char *mode)
{
FILE *file;
typeof(fopen) *original_fopen = dlsym(RTLD_NEXT, "fopen");
debug(D_DEBUG, "fopen from %d.\n", getpid());
file = original_fopen(path, mode);
if(file)
{
struct monitor_msg msg;
msg.type = OPEN;
msg.origin = getpid();
strcpy(msg.data.s, path);
send_monitor_msg(&msg);
}
return file;
}
int fchdir(int fd)
{
int status;
typeof(fchdir) *original_fchdir = dlsym(RTLD_NEXT, "fchdir");
debug(D_DEBUG, "fchdir from %d.\n", getpid());
status = original_fchdir(fd);
if(status == 0)
{
struct monitor_msg msg;
char *newpath = getcwd(NULL, 0);
msg.type = CHDIR;
msg.origin = getpid();
strcpy(msg.data.s, newpath);
free(newpath);
send_monitor_msg(&msg);
}
return status;
}
pid_t waitpid(pid_t pid, int *status, int options)
{
int status_; //status might be NULL, thus we use status_ to retrive the state.
pid_t pidb;
typeof(waitpid) *original_waitpid = dlsym(RTLD_NEXT, "waitpid");
debug(D_DEBUG, "waiting from %d.\n", getpid());
pidb = original_waitpid(pid, &status_, options);
if(WIFEXITED(status_) || WIFSIGNALED(status_))
{
struct monitor_msg msg;
msg.type = END;
msg.origin = getpid();
msg.data.p = pidb;
send_monitor_msg(&msg);
}
if(status)
*status = status_;
return pid;
}