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#include "../include/Rpc.hpp"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <limits.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/fcntl.h>
namespace gsr {
static void get_runtime_filepath(char *buffer, size_t buffer_size, const char *filename) {
char dir[PATH_MAX];
const char *runtime_dir = getenv("XDG_RUNTIME_DIR");
if(runtime_dir)
snprintf(dir, sizeof(dir), "%s", runtime_dir);
else
snprintf(dir, sizeof(dir), "/run/user/%d", geteuid());
if(access(dir, F_OK) != 0)
snprintf(dir, sizeof(dir), "/tmp");
snprintf(buffer, buffer_size, "%s/%s", dir, filename);
}
Rpc::~Rpc() {
if(fd > 0)
close(fd);
if(file)
fclose(file);
if(!fifo_filepath.empty())
remove(fifo_filepath.c_str());
}
bool Rpc::create(const char *name) {
if(file) {
fprintf(stderr, "Error: Rpc::create: already created/opened\n");
return false;
}
char fifo_filepath_tmp[PATH_MAX];
get_runtime_filepath(fifo_filepath_tmp, sizeof(fifo_filepath_tmp), name);
fifo_filepath = fifo_filepath_tmp;
remove(fifo_filepath.c_str());
if(mkfifo(fifo_filepath.c_str(), 0600) != 0) {
fprintf(stderr, "Error: mkfifo failed, error: %s, %s\n", strerror(errno), fifo_filepath.c_str());
return false;
}
if(!open_filepath(fifo_filepath.c_str())) {
remove(fifo_filepath.c_str());
fifo_filepath.clear();
return false;
}
return true;
}
bool Rpc::open(const char *name) {
if(file) {
fprintf(stderr, "Error: Rpc::open: already created/opened\n");
return false;
}
char fifo_filepath_tmp[PATH_MAX];
get_runtime_filepath(fifo_filepath_tmp, sizeof(fifo_filepath_tmp), name);
return open_filepath(fifo_filepath_tmp);
}
bool Rpc::open_filepath(const char *filepath) {
fd = ::open(filepath, O_RDWR | O_NONBLOCK);
if(fd <= 0)
return false;
file = fdopen(fd, "r+");
if(!file) {
close(fd);
fd = 0;
return false;
}
fd = 0;
return true;
}
bool Rpc::write(const char *str, size_t size) {
if(!file) {
fprintf(stderr, "Error: Rpc::write: fifo not created/opened yet\n");
return false;
}
ssize_t offset = 0;
while(offset < (ssize_t)size) {
const ssize_t bytes_written = fwrite(str + offset, 1, size - offset, file);
fflush(file);
if(bytes_written > 0)
offset += bytes_written;
}
return true;
}
void Rpc::poll() {
if(!file) {
//fprintf(stderr, "Error: Rpc::poll: fifo not created/opened yet\n");
return;
}
std::string name;
char line[1024];
while(fgets(line, sizeof(line), file)) {
int line_len = strlen(line);
if(line_len == 0)
continue;
if(line[line_len - 1] == '\n') {
line[line_len - 1] = '\0';
--line_len;
}
name = line;
auto it = handlers_by_name.find(name);
if(it != handlers_by_name.end())
it->second(name);
}
}
bool Rpc::add_handler(const std::string &name, RpcCallback callback) {
return handlers_by_name.insert(std::make_pair(name, std::move(callback))).second;
}
}
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