diff options
Diffstat (limited to 'qemu-char.c')
| -rw-r--r-- | qemu-char.c | 169 |
1 files changed, 68 insertions, 101 deletions
diff --git a/qemu-char.c b/qemu-char.c index b1d80dd24e..1e882cfeea 100644 --- a/qemu-char.c +++ b/qemu-char.c @@ -218,15 +218,13 @@ static int null_chr_write(CharDriverState *chr, const uint8_t *buf, int len) return len; } -static int qemu_chr_open_null(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_null(QemuOpts *opts) { CharDriverState *chr; chr = g_malloc0(sizeof(CharDriverState)); chr->chr_write = null_chr_write; - - *_chr= chr; - return 0; + return chr; } /* MUX driver for serial I/O splitting */ @@ -636,21 +634,18 @@ static CharDriverState *qemu_chr_open_fd(int fd_in, int fd_out) return chr; } -static int qemu_chr_open_file_out(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_file_out(QemuOpts *opts) { 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 -errno; - } - - *_chr = qemu_chr_open_fd(-1, fd_out); - return 0; + if (fd_out < 0) + return NULL; + return qemu_chr_open_fd(-1, fd_out); } -static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_pipe(QemuOpts *opts) { int fd_in, fd_out; char filename_in[256], filename_out[256]; @@ -658,7 +653,7 @@ static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr) if (filename == NULL) { fprintf(stderr, "chardev: pipe: no filename given\n"); - return -EINVAL; + return NULL; } snprintf(filename_in, 256, "%s.in", filename); @@ -670,14 +665,11 @@ static int qemu_chr_open_pipe(QemuOpts *opts, CharDriverState **_chr) close(fd_in); if (fd_out >= 0) close(fd_out); - TFR(fd_in = fd_out = qemu_open(filename, O_RDWR | O_BINARY)); - if (fd_in < 0) { - return -errno; - } + TFR(fd_in = fd_out = open(filename, O_RDWR | O_BINARY)); + if (fd_in < 0) + return NULL; } - - *_chr = qemu_chr_open_fd(fd_in, fd_out); - return 0; + return qemu_chr_open_fd(fd_in, fd_out); } @@ -768,14 +760,12 @@ static void qemu_chr_close_stdio(struct CharDriverState *chr) fd_chr_close(chr); } -static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_stdio(QemuOpts *opts) { CharDriverState *chr; - if (stdio_nb_clients >= STDIO_MAX_CLIENTS) { - return -EBUSY; - } - + if (stdio_nb_clients >= STDIO_MAX_CLIENTS) + return NULL; if (stdio_nb_clients == 0) { old_fd0_flags = fcntl(0, F_GETFL); tcgetattr (0, &oldtty); @@ -792,8 +782,7 @@ static int qemu_chr_open_stdio(QemuOpts *opts, CharDriverState **_chr) display_type != DT_NOGRAPHIC); qemu_chr_fe_set_echo(chr, false); - *_chr = chr; - return 0; + return chr; } #ifdef __sun__ @@ -980,7 +969,7 @@ static void pty_chr_close(struct CharDriverState *chr) qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } -static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) { CharDriverState *chr; PtyCharDriver *s; @@ -995,7 +984,7 @@ static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) #endif if (openpty(&master_fd, &slave_fd, pty_name, NULL, NULL) < 0) { - return -errno; + return NULL; } /* Set raw attributes on the pty. */ @@ -1021,8 +1010,7 @@ static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) s->fd = master_fd; s->timer = qemu_new_timer_ms(rt_clock, pty_chr_timer, chr); - *_chr = chr; - return 0; + return chr; } static void tty_serial_init(int fd, int speed, @@ -1223,28 +1211,30 @@ static void qemu_chr_close_tty(CharDriverState *chr) } } -static int qemu_chr_open_tty(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_tty(QemuOpts *opts) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; int fd; - TFR(fd = qemu_open(filename, O_RDWR | O_NONBLOCK)); + TFR(fd = open(filename, O_RDWR | O_NONBLOCK)); if (fd < 0) { - return -errno; + return NULL; } 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; - - *_chr = chr; - return 0; + return chr; } #else /* ! __linux__ && ! __sun__ */ -static int qemu_chr_open_pty(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_pty(QemuOpts *opts) { - return -ENOTSUP; + return NULL; } #endif /* __linux__ || __sun__ */ @@ -1358,7 +1348,7 @@ static void pp_close(CharDriverState *chr) qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } -static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1366,13 +1356,12 @@ static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) int fd; TFR(fd = open(filename, O_RDWR)); - if (fd < 0) { - return -errno; - } + if (fd < 0) + return NULL; if (ioctl(fd, PPCLAIM) < 0) { close(fd); - return -errno; + return NULL; } drv = g_malloc0(sizeof(ParallelCharDriver)); @@ -1387,8 +1376,7 @@ static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) qemu_chr_generic_open(chr); - *_chr = chr; - return 0; + return chr; } #endif /* __linux__ */ @@ -1430,24 +1418,21 @@ static int pp_ioctl(CharDriverState *chr, int cmd, void *arg) return 0; } -static int qemu_chr_open_pp(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_pp(QemuOpts *opts) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; int fd; - fd = qemu_open(filename, O_RDWR); - if (fd < 0) { - return -errno; - } + fd = open(filename, O_RDWR); + if (fd < 0) + return NULL; chr = g_malloc0(sizeof(CharDriverState)); chr->opaque = (void *)(intptr_t)fd; chr->chr_write = null_chr_write; chr->chr_ioctl = pp_ioctl; - - *_chr = chr; - return 0; + return chr; } #endif @@ -1663,7 +1648,7 @@ static int win_chr_poll(void *opaque) return 0; } -static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_win(QemuOpts *opts) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1678,12 +1663,10 @@ static int qemu_chr_open_win(QemuOpts *opts, CharDriverState **_chr) if (win_chr_init(chr, filename) < 0) { g_free(s); g_free(chr); - return -EIO; + return NULL; } qemu_chr_generic_open(chr); - - *_chr = chr; - return 0; + return chr; } static int win_chr_pipe_poll(void *opaque) @@ -1765,7 +1748,7 @@ static int win_chr_pipe_init(CharDriverState *chr, const char *filename) } -static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_win_pipe(QemuOpts *opts) { const char *filename = qemu_opt_get(opts, "path"); CharDriverState *chr; @@ -1780,15 +1763,13 @@ static int qemu_chr_open_win_pipe(QemuOpts *opts, CharDriverState **_chr) if (win_chr_pipe_init(chr, filename) < 0) { g_free(s); g_free(chr); - return -EIO; + return NULL; } qemu_chr_generic_open(chr); - - *_chr = chr; - return 0; + return chr; } -static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr) +static CharDriverState *qemu_chr_open_win_file(HANDLE fd_out) { CharDriverState *chr; WinCharState *s; @@ -1799,27 +1780,25 @@ static int qemu_chr_open_win_file(HANDLE fd_out, CharDriverState **pchr) chr->opaque = s; chr->chr_write = win_chr_write; qemu_chr_generic_open(chr); - *pchr = chr; - return 0; + return chr; } -static int qemu_chr_open_win_con(QemuOpts *opts, CharDriverState **chr) +static CharDriverState *qemu_chr_open_win_con(QemuOpts *opts) { - return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE), chr); + return qemu_chr_open_win_file(GetStdHandle(STD_OUTPUT_HANDLE)); } -static int qemu_chr_open_win_file_out(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_win_file_out(QemuOpts *opts) { 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 -EIO; - } + if (fd_out == INVALID_HANDLE_VALUE) + return NULL; - return qemu_chr_open_win_file(fd_out, _chr); + return qemu_chr_open_win_file(fd_out); } static int win_stdio_write(CharDriverState *chr, const uint8_t *buf, int len) @@ -1960,7 +1939,7 @@ static void win_stdio_close(CharDriverState *chr) stdio_nb_clients--; } -static int qemu_chr_open_win_stdio(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_win_stdio(QemuOpts *opts) { CharDriverState *chr; WinStdioCharState *stdio; @@ -1969,7 +1948,7 @@ static int qemu_chr_open_win_stdio(QemuOpts *opts, CharDriverState **_chr) if (stdio_nb_clients >= STDIO_MAX_CLIENTS || ((display_type != DT_NOGRAPHIC) && (stdio_nb_clients != 0))) { - return -EIO; + return NULL; } chr = g_malloc0(sizeof(CharDriverState)); @@ -2028,9 +2007,7 @@ static int qemu_chr_open_win_stdio(QemuOpts *opts, CharDriverState **_chr) chr->chr_set_echo = qemu_chr_set_echo_win_stdio; qemu_chr_fe_set_echo(chr, false); - *_chr = chr; - - return 0; + return chr; } #endif /* !_WIN32 */ @@ -2111,12 +2088,11 @@ static void udp_chr_close(CharDriverState *chr) qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } -static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_udp(QemuOpts *opts) { CharDriverState *chr = NULL; NetCharDriver *s = NULL; int fd = -1; - int ret; chr = g_malloc0(sizeof(CharDriverState)); s = g_malloc0(sizeof(NetCharDriver)); @@ -2124,7 +2100,6 @@ static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr) fd = inet_dgram_opts(opts); if (fd < 0) { fprintf(stderr, "inet_dgram_opts failed\n"); - ret = -errno; goto return_err; } @@ -2135,9 +2110,7 @@ static int qemu_chr_open_udp(QemuOpts *opts, CharDriverState **_chr) chr->chr_write = udp_chr_write; chr->chr_update_read_handler = udp_chr_update_read_handler; chr->chr_close = udp_chr_close; - - *_chr = chr; - return 0; + return chr; return_err: g_free(chr); @@ -2145,7 +2118,7 @@ return_err: if (fd >= 0) { closesocket(fd); } - return ret; + return NULL; } /***********************************************************/ @@ -2436,7 +2409,7 @@ static void tcp_chr_close(CharDriverState *chr) qemu_chr_be_event(chr, CHR_EVENT_CLOSED); } -static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr) +static CharDriverState *qemu_chr_open_socket(QemuOpts *opts) { CharDriverState *chr = NULL; TCPCharDriver *s = NULL; @@ -2446,7 +2419,6 @@ static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr) 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); @@ -2472,10 +2444,8 @@ static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr) fd = inet_connect_opts(opts); } } - if (fd < 0) { - ret = -errno; + if (fd < 0) goto fail; - } if (!is_waitconnect) socket_set_nonblock(fd); @@ -2528,16 +2498,14 @@ static int qemu_chr_open_socket(QemuOpts *opts, CharDriverState **_chr) tcp_chr_accept(chr); socket_set_nonblock(s->listen_fd); } - - *_chr = chr; - return 0; + return chr; fail: if (fd >= 0) closesocket(fd); g_free(s); g_free(chr); - return ret; + return NULL; } /***********************************************************/ @@ -2730,7 +2698,7 @@ fail: static const struct { const char *name; - int (*open)(QemuOpts *opts, CharDriverState **chr); + CharDriverState *(*open)(QemuOpts *opts); } backend_table[] = { { .name = "null", .open = qemu_chr_open_null }, { .name = "socket", .open = qemu_chr_open_socket }, @@ -2771,7 +2739,6 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts, { CharDriverState *chr; int i; - int ret; if (qemu_opts_id(opts) == NULL) { fprintf(stderr, "chardev: no id specified\n"); @@ -2793,10 +2760,10 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts, return NULL; } - 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)); + chr = backend_table[i].open(opts); + if (!chr) { + fprintf(stderr, "chardev: opening backend \"%s\" failed\n", + qemu_opt_get(opts, "backend")); return NULL; } |