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#include "transmission.h"
#include "program.h"
#include "buffer.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#define NUM_COLUMNS 10
int transmission_is_daemon_running(void) {
const char *args[] = { "transmission-remote", "-si", NULL };
return program_exec(args, NULL, NULL);
}
int transmission_start_daemon(const char *download_dir) {
/* TODO: Make seed ratio configurable */
const char *args[] = { "transmission-daemon", "--global-seedratio", "2.0", "--download-dir", download_dir, NULL };
int res = program_exec(args, NULL, NULL);
if(res != 0)
return res;
fprintf(stderr, "Waiting for the transmission daemon to startup...\n");
int num_tries = 0;
const int max_tries = 7; /* 7 seconds */
while(transmission_is_daemon_running() != 0 && num_tries < max_tries) {
sleep(1);
++num_tries;
}
if(num_tries == max_tries) {
fprintf(stderr, "Failed to launch transmission daemon in 7 seconds\n");
return -1;
}
fprintf(stderr, "The transmission daemon is now running!\n");
return 0;
}
int transmission_add_torrent(const char *url) {
const char *args[] = { "transmission-remote", "-a", "--", url, NULL };
return program_exec(args, NULL, NULL);
}
int transmission_get_all_torrents(TorrentListCallback callback, void *userdata) {
int result = 0;
Buffer buffer;
buffer_init(&buffer);
const char *args[] = { "transmission-remote", "--list", NULL };
int exec_res = program_exec(args, program_buffer_write_callback, &buffer);
if(exec_res != 0) {
result = exec_res;
goto cleanup;
}
buffer_append(&buffer, "\0", 1);
char id[6];
char done[6];
char have[13];
char format[7];
char eta[33];
char eta2[13];
char up[11];
char down[11];
char ratio[11];
char status[33];
char name[256];
char *end_of_first_line = strchr(buffer.data, '\n');
if(!end_of_first_line)
goto cleanup;
int num_bytes_read = 0;
size_t offset = end_of_first_line - (char*)buffer.data;
while(offset < buffer.size) {
/* ID, Done, Have (size, format), ETA, Up, Down, Ratio, Status, Name */
int res = sscanf(buffer.data + offset, "%5s %5s %12s %6s %32s %12s %10s %10s %10s %32s %[^\n] %n", id, done, have, format, eta, eta2, up, down, ratio, status, name, &num_bytes_read);
if(res == EOF || res != NUM_COLUMNS + 1) {
int res = sscanf(buffer.data + offset, "%5s %5s %12s %6s %32s %10s %10s %10s %32s %[^\n] %n", id, done, have, format, eta, up, down, ratio, status, name, &num_bytes_read);
if(res == EOF || res != NUM_COLUMNS)
break;
}
callback(atoi(id), atof(done), name, userdata);
offset += num_bytes_read;
}
cleanup:
buffer_deinit(&buffer);
return result;
}
static int find_start_of_line(const char *str, int offset) {
for(int i = offset; i >= 0; --i) {
if(*str == '\n')
return i + 1;
}
return 0;
}
static int find_end_of_previous_line(const char *str, int offset) {
for(int i = offset; i >= 0; --i) {
if(*str == '\n')
return i - 1;
}
return 0;
}
int transmission_get_last_added_torrent(int *id_result, float *percentage_finished_result, char *title_result) {
int result = 0;
Buffer buffer;
buffer_init(&buffer);
const char *args[] = { "transmission-remote", "--list", NULL };
int exec_res = program_exec(args, program_buffer_write_callback, &buffer);
if(exec_res != 0) {
result = exec_res;
goto cleanup;
}
char id[6];
char done[6];
char have[13];
char format[7];
char eta[33];
char eta2[13];
char up[11];
char down[11];
char ratio[11];
char status[33];
char name[256];
int end_of_second_last_line = find_end_of_previous_line(buffer.data, (int)buffer.size - 1);
int start_of_second_last_line = find_start_of_line(buffer.data, end_of_second_last_line);
/* ID, Done, Have (size, format), ETA, Up, Down, Ratio, Status, Name */
int res = sscanf(buffer.data + start_of_second_last_line, "%5s %5s %12s %6s %32s %12s %10s %10s %10s %32s %[^\n]", id, done, have, format, eta, eta2, up, down, ratio, status, name);
if(res == EOF || res != NUM_COLUMNS + 1) {
int res = sscanf(buffer.data + start_of_second_last_line, "%5s %5s %12s %6s %32s %10s %10s %10s %32s %[^\n]", id, done, have, format, eta, up, down, ratio, status, name);
if(res == EOF || res != NUM_COLUMNS) {
result = -1;
goto cleanup;
}
}
*id_result = atoi(id);
*percentage_finished_result = atof(done);
strcpy(title_result, name);
cleanup:
buffer_deinit(&buffer);
return result;
}
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