1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
7 * Licensed under GPLv2, see file LICENSE in this tarball for details.
12 static void kill_helper(void)
14 if (G.helper_pid > 0) {
15 kill(G.helper_pid, SIGTERM);
20 // generic signal handler
21 static void signal_handler(int signo)
24 if (SIGALRM == signo) {
26 bb_error_msg_and_die("timed out");
29 // SIGCHLD. reap zombies
30 if (safe_waitpid(G.helper_pid, &err, WNOHANG) > 0) {
32 bb_error_msg_and_die("helper killed by signal %u", WTERMSIG(err));
36 bb_error_msg_and_die("helper exited (%u)", WEXITSTATUS(err));
42 void FAST_FUNC launch_helper(const char **argv)
44 // setup vanilla unidirectional pipes interchange
51 // NB: handler must be installed before vfork
57 G.helper_pid = vfork();
59 bb_perror_msg_and_die("vfork");
61 i = (!G.helper_pid) * 2; // for parent:0, for child:2
62 close(pipes[i + 1]); // 1 or 3 - closing one write end
63 close(pipes[2 - i]); // 2 or 0 - closing one read end
64 xmove_fd(pipes[i], STDIN_FILENO); // 0 or 2 - using other read end
65 xmove_fd(pipes[3 - i], STDOUT_FILENO); // 3 or 1 - other write end
68 // child: try to execute connection helper
69 // NB: SIGCHLD & SIGALRM revert to SIG_DFL on exec
70 BB_EXECVP(*argv, (char **)argv);
75 // check whether child is alive
76 //redundant:signal_handler(SIGCHLD);
77 // child seems OK -> parent goes on
81 const FAST_FUNC char *command(const char *fmt, const char *param)
83 const char *msg = fmt;
87 msg = xasprintf(fmt, param);
88 printf("%s\r\n", msg);
94 // NB: parse_url can modify url[] (despite const), but only if '@' is there
96 static char FAST_FUNC *parse_url(char *url, char **user, char **pass)
98 // parse [user[:pass]@]host
100 char *s = strchr(url, '@');
101 *user = *pass = NULL;
106 s = strchr(*user, ':');
116 void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol)
119 SRC_BUF_SIZE = 45, /* This *MUST* be a multiple of 3 */
120 DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
126 char dst_buf[DST_BUF_SIZE + 1];
129 fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : (FILE *)text;
130 src_buf = bb_common_bufsiz1;
131 // N.B. strlen(NULL) segfaults!
133 // though we do not call uuencode(NULL, NULL) explicitly
134 // still we do not want to break things suddenly
142 size = fread((char *)src_buf, 1, SRC_BUF_SIZE, fp);
143 if ((ssize_t)size < 0)
144 bb_perror_msg_and_die(bb_msg_read_error);
147 if (len > SRC_BUF_SIZE)
152 // encode the buffer we just read in
153 bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64);
160 fwrite(dst_buf, 1, 4 * ((size + 2) / 3), stdout);
162 if (fname && NOT_LONE_DASH(fname))
167 void FAST_FUNC decode_base64(FILE *src_stream, FILE *dst_stream)
179 /* Get next _valid_ character.
180 * global vector bb_uuenc_tbl_base64[] contains this string:
181 * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n"
184 ch = fgetc(src_stream);
186 bb_error_msg_and_die(bb_msg_read_error);
188 // - means end of MIME section
191 ungetc(ch, src_stream);
194 table_ptr = strchr(bb_uuenc_tbl_base64, ch);
195 } while (table_ptr == NULL);
197 /* Convert encoded character to decimal */
198 ch = table_ptr - bb_uuenc_tbl_base64;
200 if (*table_ptr == '=') {
201 if (term_count == 0) {
202 translated[count] = '\0';
206 } else if (*table_ptr == '\n') {
207 /* Check for terminating line */
208 if (term_count == 5) {
214 translated[count] = ch;
220 /* Merge 6 bit chars to 8 bit */
222 fputc(translated[0] << 2 | translated[1] >> 4, dst_stream);
225 fputc(translated[1] << 4 | translated[2] >> 2, dst_stream);
228 fputc(translated[2] << 6 | translated[3], dst_stream);
235 * get username and password from a file descriptor
237 void FAST_FUNC get_cred_or_die(int fd)
240 G.user = xstrdup(bb_ask(fd, /* timeout: */ 0, "User: "));
241 G.pass = xstrdup(bb_ask(fd, /* timeout: */ 0, "Password: "));
243 G.user = xmalloc_reads(fd, /* pfx: */ NULL, /* maxsize: */ NULL);
244 G.pass = xmalloc_reads(fd, /* pfx: */ NULL, /* maxsize: */ NULL);
246 if (!G.user || !*G.user || !G.pass)
247 bb_error_msg_and_die("no username or password");