diff options
Diffstat (limited to 'qemu-char.c')
| -rw-r--r-- | qemu-char.c | 165 |
1 files changed, 97 insertions, 68 deletions
diff --git a/qemu-char.c b/qemu-char.c index fb13b28454..926987b98a 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -219,13 +219,15 @@ static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len) return len; } -static CharDriverState *qemu_chr_open_null(QemuOpts *opts) +static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr) { CharDriverState *chr; chr = qemu_mallocz(sizeof(CharDriverState)); chr->chr_write = null_chr_write; - return chr; + + *_chr= chr; + return 0; } /* MUX driver for serial I/O splitting */ @@ -634,18 +636,21 @@ static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out) return chr; } -static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts) +static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr) { int fd_out; TFR(fd_out = qemu_open(qemu_opt_get(opts, "path"), O_WRONLY | O_TRUNC | O_CREAT | O_BINARY, 0666)); - if (fd_out < 0) - return NULL; - return qemu_chr_open_fd(-1, fd_out); + if (fd_out < 0) { + return -errno; + } + + *_chr = qemu_chr_open_fd(-1, fd_out); + return 0; } -static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts) +static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr) { int fd_in, fd_out; char filename_in[256], filename_out[256]; @@ -653,7 +658,7 @@ static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts) if (filename == NULL) { fprintf(stderr, "chardev: pipe: no filename given\n"); - return NULL; + return -EINVAL; } snprintf(filename_in, 256, "%s.in", filename); @@ -665,11 +670,14 @@ static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts) close(fd_in); if (fd_out >= 0) close(fd_out); - TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY)); - if (fd_in < 0) - return NULL; + TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); + if (fd_in < 0) { + return -errno; + } } - return qemu_chr_open_fd(fd_in, fd_out); + + *_chr = qemu_chr_open_fd(fd_in, fd_out); + return 0; } @@ -760,12 +768,14 @@ static void qemu_chr_close_stdio(struct CharDriverState *chr) fd_chr_close(chr); } -static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts) +static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr) { CharDriverState *chr; - if (stdio_nb_clients >= STDIO_MAX_CLIENTS) - return NULL; + if (stdio_nb_clients >= STDIO_MAX_CLIENTS) { + return -EBUSY; + } + if (stdio_nb_clients == 0) { old_fd0_flags = fcntl(0, F_GETFL); tcgetattr (0, &oldtty); @@ -782,7 +792,8 @@ static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts) display_type != DT_NOGRAPHIC); qemu_chr_set_echo(chr, false); - return chr; + *_chr = chr; + return 0; } #ifdef __sun__ @@ -969,7 +980,7 @@ static void pty_chr_close(struct CharDriverState *chr) qemu_chr_event(chr, CHR_EVENT_CLOSED); } -static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) +static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) { CharDriverState *chr; PtyCharDriver *s; @@ -987,7 +998,7 @@ static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) s = qemu_mallocz(sizeof(PtyCharDriver)); if (openpty(&s->fd, &slave_fd, pty_name, NULL, NULL) < 0) { - return NULL; + return -errno; } /* Set raw attributes on the pty. */ @@ -1009,7 +1020,8 @@ static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr); - return chr; + *_chr = chr; + return 0; } static void tty_serial_init(int fd, int speed, @@ -1210,30 +1222,28 @@ static void qemu_chr_close_tty(CharDriverState *chr) } } -static CharDriverState *qemu_chr_open_tty(QemuOpts *opts) +static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; int fd; - TFR(fd = open(filename, O_RDWR | O_NONBLOCK)); + TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK)); if (fd < 0) { - return NULL; + return -errno; } tty_serial_init(fd, 115200, 'N', 8, 1); chr = qemu_chr_open_fd(fd, fd); - if (!chr) { - close(fd); - return NULL; - } chr->chr_ioctl = tty_serial_ioctl; chr->chr_close = qemu_chr_close_tty; - return chr; + + *_chr = chr; + return 0; } #else /* ! __linux__ && ! __sun__ */ -static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) +static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) { - return NULL; + return -ENOTSUP; } #endif /* __linux__ || __sun__ */ @@ -1347,7 +1357,7 @@ static void pp_close(CharDriverState *chr) qemu_chr_event(chr, CHR_EVENT_CLOSED); } -static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) +static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1355,12 +1365,13 @@ static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) int fd; TFR(fd = open(filename, O_RDWR)); - if (fd < 0) - return NULL; + if (fd < 0) { + return -errno; + } if (ioctl(fd, PPCLAIM) < 0) { close(fd); - return NULL; + return -errno; } drv = qemu_mallocz(sizeof(ParallelCharDriver)); @@ -1375,7 +1386,8 @@ static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) qemu_chr_generic_open(chr); - return chr; + *_chr = chr; + return 0; } #endif /* __linux__ */ @@ -1417,21 +1429,24 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) return 0; } -static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) +static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; int fd; - fd = open(filename, O_RDWR); - if (fd < 0) - return NULL; + fd = qemu_open(filename, O_RDWR); + if (fd < 0) { + return -errno; + } chr = qemu_mallocz(sizeof(CharDriverState)); chr->opaque = (void *)(intptr_t)fd; chr->chr_write = null_chr_write; chr->chr_ioctl = pp_ioctl; - return chr; + + *_chr = chr; + return 0; } #endif @@ -1637,7 +1652,7 @@ static int win_chr_poll(void *opaque) return 0; } -static CharDriverState *qemu_chr_open_win(QemuOpts *opts) +static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1652,10 +1667,12 @@ static CharDriverState *qemu_chr_open_win(QemuOpts *opts) if (win_chr_init(chr, filename) < 0) { free(s); free(chr); - return NULL; + return -EIO; } qemu_chr_generic_open(chr); - return chr; + + *_chr = chr; + return 0; } static int win_chr_pipe_poll(void *opaque) @@ -1737,7 +1754,7 @@ static int win_chr_pipe_init(CharDriverState *chr, const char *filename) } -static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts) +static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1752,10 +1769,12 @@ static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts) if (win_chr_pipe_init(chr, filename) < 0) { free(s); free(chr); - return NULL; + return -EIO; } qemu_chr_generic_open(chr); - return chr; + + *_chr = chr; + return 0; } static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out) @@ -1772,22 +1791,23 @@ static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out) return chr; } -static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts) +static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **_chr) { - return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE)); + return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr); } -static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts) +static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr) { const char *file_out = qemu_opt_get(opts, "path"); HANDLE fd_out; fd_out = CreateFile(file_out, GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); - if (fd_out == INVALID_HANDLE_VALUE) - return NULL; + if (fd_out == INVALID_HANDLE_VALUE) { + return -EIO; + } - return qemu_chr_open_win_file(fd_out); + return qemu_chr_open_win_file(fd_out, _chr); } #endif /* !_WIN32 */ @@ -1868,11 +1888,12 @@ static void udp_chr_close(CharDriverState *chr) qemu_chr_event(chr, CHR_EVENT_CLOSED); } -static CharDriverState *qemu_chr_open_udp(QemuOpts *opts) +static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr) { CharDriverState *chr = NULL; NetCharDriver *s = NULL; int fd = -1; + int ret; chr = qemu_mallocz(sizeof(CharDriverState)); s = qemu_mallocz(sizeof(NetCharDriver)); @@ -1880,6 +1901,7 @@ static CharDriverState *qemu_chr_open_udp(QemuOpts *opts) fd = inet_dgram_opts(opts); if (fd < 0) { fprintf(stderr, "inet_dgram_opts failed\n"); + ret = -errno; goto return_err; } @@ -1890,16 +1912,17 @@ static CharDriverState *qemu_chr_open_udp(QemuOpts *opts) chr->chr_write = udp_chr_write; chr->chr_update_read_handler = udp_chr_update_read_handler; chr->chr_close = udp_chr_close; - return chr; + + *_chr = chr; + return 0; return_err: - if (chr) - free(chr); - if (s) - free(s); - if (fd >= 0) + qemu_free(chr); + qemu_free(s); + if (fd >= 0) { closesocket(fd); - return NULL; + } + return ret; } /***********************************************************/ @@ -2178,7 +2201,7 @@ static void tcp_chr_close(CharDriverState *chr) qemu_chr_event(chr, CHR_EVENT_CLOSED); } -static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) +static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr) { CharDriverState *chr = NULL; TCPCharDriver *s = NULL; @@ -2188,6 +2211,7 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) int do_nodelay; int is_unix; int is_telnet; + int ret; is_listen = qemu_opt_get_bool(opts, "server", 0); is_waitconnect = qemu_opt_get_bool(opts, "wait", 1); @@ -2213,8 +2237,10 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) fd = inet_connect_opts(opts); } } - if (fd < 0) + if (fd < 0) { + ret = -errno; goto fail; + } if (!is_waitconnect) socket_set_nonblock(fd); @@ -2266,14 +2292,16 @@ static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) tcp_chr_accept(chr); socket_set_nonblock(s->listen_fd); } - return chr; + + *_chr = chr; + return 0; fail: if (fd >= 0) closesocket(fd); qemu_free(s); qemu_free(chr); - return NULL; + return ret; } /***********************************************************/ @@ -2466,7 +2494,7 @@ fail: static const struct { const char *name; - CharDriverState *(*open)(QemuOpts *opts); + int (*open)(QemuOpts *opts, CharDriverState **chr); } backend_table[] = { { .name = "null", .open = qemu_chr_open_null }, { .name = "socket", .open = qemu_chr_open_socket }, @@ -2506,6 +2534,7 @@ CharDriverState *qemu_chr_open_opts(QemuOpts *opts, { CharDriverState *chr; int i; + int ret; if (qemu_opts_id(opts) == NULL) { fprintf(stderr, "chardev: no id specified\n"); @@ -2527,10 +2556,10 @@ CharDriverState *qemu_chr_open_opts(QemuOpts *opts, return NULL; } - chr = backend_table[i].open(opts); - if (!chr) { - fprintf(stderr, "chardev: opening backend \"%s\" failed\n", - qemu_opt_get(opts, "backend")); + ret = backend_table[i].open(opts, &chr); + if (ret < 0) { + fprintf(stderr, "chardev: opening backend \"%s\" failed: %s\n", + qemu_opt_get(opts, "backend"), strerror(-ret)); return NULL; } |