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util: move read_password method out of qemu-img into osdep/oslib

Browse source 
The qemu-img.c file has a read_password() method impl that is
used to prompt for passwords on the console, with impls for
POSIX and Windows. This will be needed by qemu-io.c too, so
move it into the QEMU osdep/oslib files where it can be shared
without code duplication

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Daniel P. Berrange 2015-05-12 17:09:19 +01:00 committed by Kevin Wolf
parent 8336aafae1
commit d57e4e482e
4 changed files with 93 additions and 92 deletions
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2
include/qemu/osdep.h
View file

@ -259,4 +259,6 @@ void qemu_set_tty_echo(int fd, bool echo);
void os_mem_prealloc(int fd, char *area, size_t sz);
int qemu_read_password(char *buf, int buf_size);
#endif

93
qemu-img.c
View file

@ -165,97 +165,6 @@ static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...)
return ret;
}
#if defined(WIN32)
/* XXX: put correct support for win32 */
static int read_password(char *buf, int buf_size)
{
int c, i;
printf("Password: ");
fflush(stdout);
i = 0;
for(;;) {
c = getchar();
if (c < 0) {
buf[i] = '\0';
return -1;
} else if (c == '\n') {
break;
} else if (i < (buf_size - 1)) {
buf[i++] = c;
}
}
buf[i] = '\0';
return 0;
}
#else
#include <termios.h>
static struct termios oldtty;
static void term_exit(void)
{
tcsetattr (0, TCSANOW, &oldtty);
}
static void term_init(void)
{
struct termios tty;
tcgetattr (0, &tty);
oldtty = tty;
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
atexit(term_exit);
}
static int read_password(char *buf, int buf_size)
{
uint8_t ch;
int i, ret;
printf("password: ");
fflush(stdout);
term_init();
i = 0;
for(;;) {
ret = read(0, &ch, 1);
if (ret == -1) {
if (errno == EAGAIN || errno == EINTR) {
continue;
} else {
break;
}
} else if (ret == 0) {
ret = -1;
break;
} else {
if (ch == '\r') {
ret = 0;
break;
}
if (i < (buf_size - 1))
buf[i++] = ch;
}
}
term_exit();
buf[i] = '\0';
printf("\n");
return ret;
}
#endif
static int print_block_option_help(const char *filename, const char *fmt)
{
@ -312,7 +221,7 @@ static BlockBackend *img_open(const char *id, const char *filename,
bs = blk_bs(blk);
if (bdrv_is_encrypted(bs) && require_io) {
qprintf(quiet, "Disk image '%s' is encrypted.\n", filename);
if (read_password(password, sizeof(password)) < 0) {
if (qemu_read_password(password, sizeof(password)) < 0) {
error_report("No password given");
goto fail;
}

66
util/oslib-posix.c
View file

@ -50,6 +50,7 @@ extern int daemon(int, int);
#include <termios.h>
#include <unistd.h>
#include <termios.h>
#include <glib/gprintf.h>
@ -415,3 +416,68 @@ void os_mem_prealloc(int fd, char *area, size_t memory)
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
}
}
static struct termios oldtty;
static void term_exit(void)
{
tcsetattr(0, TCSANOW, &oldtty);
}
static void term_init(void)
{
struct termios tty;
tcgetattr(0, &tty);
oldtty = tty;
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr(0, TCSANOW, &tty);
atexit(term_exit);
}
int qemu_read_password(char *buf, int buf_size)
{
uint8_t ch;
int i, ret;
printf("password: ");
fflush(stdout);
term_init();
i = 0;
for (;;) {
ret = read(0, &ch, 1);
if (ret == -1) {
if (errno == EAGAIN || errno == EINTR) {
continue;
} else {
break;
}
} else if (ret == 0) {
ret = -1;
break;
} else {
if (ch == '\r') {
ret = 0;
break;
}
if (i < (buf_size - 1)) {
buf[i++] = ch;
}
}
}
term_exit();
buf[i] = '\0';
printf("\n");
return ret;
}

24
util/oslib-win32.c
View file

@ -470,3 +470,27 @@ void os_mem_prealloc(int fd, char *area, size_t memory)
memset(area + pagesize * i, 0, 1);
}
}
/* XXX: put correct support for win32 */
int qemu_read_password(char *buf, int buf_size)
{
int c, i;
printf("Password: ");
fflush(stdout);
i = 0;
for (;;) {
c = getchar();
if (c < 0) {
buf[i] = '\0';
return -1;
} else if (c == '\n') {
break;
} else if (i < (buf_size - 1)) {
buf[i++] = c;
}
}
buf[i] = '\0';
return 0;
}