Author: stefanct Date: Mon Apr 1 02:45:57 2013 New Revision: 1664 URL: http://flashrom.org/trac/flashrom/changeset/1664
Log: serial.c: be more pedantic. Check more return codes and close the file handle in case of errors in sp_openserport(). Signed-off-by: Stefan Tauner <[email protected]> Acked-by: Stefan Tauner <[email protected]> Modified: trunk/serial.c Modified: trunk/serial.c ============================================================================== --- trunk/serial.c Mon Apr 1 02:45:51 2013 (r1663) +++ trunk/serial.c Mon Apr 1 02:45:57 2013 (r1664) @@ -185,8 +185,8 @@ } DCB dcb; if (!GetCommState(fd, &dcb)) { - msg_perr_strerror("Could not fetch serial port configuration: "); - return SER_INV_FD; + msg_perr_strerror("Could not fetch original serial port configuration: "); + goto out_close; } const struct baudentry *entry = round_baud(baud); dcb.BaudRate = entry->baud; @@ -195,16 +195,19 @@ dcb.StopBits = ONESTOPBIT; if (!SetCommState(fd, &dcb)) { msg_perr_strerror("Could not change serial port configuration: "); - return SER_INV_FD; + goto out_close; } if (!GetCommState(fd, &dcb)) { - msg_perr_strerror("Could not fetch serial port configuration: "); - return SER_INV_FD; + msg_perr_strerror("Could not fetch new serial port configuration: "); + goto out_close; } msg_pdbg("Baud rate is %ld.\n", dcb.BaudRate); return fd; +out_close: + CloseHandle(sp_fd); + return SER_INV_FD; #else - struct termios options; + struct termios wanted, observed; int fd; fd = open(dev, O_RDWR | O_NOCTTY | O_NDELAY); if (fd < 0) { @@ -212,18 +215,43 @@ return SER_INV_FD; } fcntl(fd, F_SETFL, 0); - tcgetattr(fd, &options); + if (tcgetattr(fd, &observed) != 0) { + msg_perr_strerror("Could not fetch original serial port configuration: "); + goto out_close; + } + wanted = observed; const struct baudentry *entry = round_baud(baud); - cfsetispeed(&options, entry->flag); - cfsetospeed(&options, entry->flag); - msg_pdbg("Setting baud rate to %d.\n", entry->baud); - options.c_cflag &= ~(PARENB | CSTOPB | CSIZE | CRTSCTS); - options.c_cflag |= (CS8 | CLOCAL | CREAD); - options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); - options.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL | IGNCR | INLCR); - options.c_oflag &= ~OPOST; - tcsetattr(fd, TCSANOW, &options); + if (cfsetispeed(&wanted, entry->flag) != 0 || cfsetospeed(&wanted, entry->flag) != 0) { + msg_perr_strerror("Could not set serial baud rate: "); + goto out_close; + } + wanted.c_cflag &= ~(PARENB | CSTOPB | CSIZE | CRTSCTS); + wanted.c_cflag |= (CS8 | CLOCAL | CREAD); + wanted.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); + wanted.c_iflag &= ~(IXON | IXOFF | IXANY | ICRNL | IGNCR | INLCR); + wanted.c_oflag &= ~OPOST; + if (tcsetattr(fd, TCSANOW, &wanted) != 0) { + msg_perr_strerror("Could not change serial port configuration: "); + goto out_close; + } + if (tcgetattr(fd, &observed) != 0) { + msg_perr_strerror("Could not fetch new serial port configuration: "); + goto out_close; + } + if (observed.c_cflag != wanted.c_cflag || + observed.c_lflag != wanted.c_lflag || + observed.c_iflag != wanted.c_iflag || + observed.c_oflag != wanted.c_oflag || + cfgetispeed(&observed) != cfgetispeed(&wanted)) { + msg_perr("%s: Some requested options did not stick.\n", __func__); + goto out_close; + } + msg_pdbg("Baud rate is %d.\n", entry->baud); return fd; + +out_close: + close(sp_fd); + return SER_INV_FD; #endif } _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
