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dasdfmt: Fixup device name handling

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get_device_name() contains a chunk of unreachable code, as the
'name' argument is never filled with any value.
So turn things around to have get_device_name() always fill the
'name' argument with the real device name, and remove the
devname entry from the dasdfmt_info_t structure.

GitHub-ID: #8

Signed-off-by: Hannes Reinecke <hare@suse.com>
Acked-by: Jan Höppner <hoeppner@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
This commit is contained in:
Hannes Reinecke
2017-10-05 09:59:41 +02:00
committed by Michael Holzheu
parent 97047896ab
commit 0028f166aa
2 changed files with 30 additions and 41 deletions
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70
dasdfmt/dasdfmt.c
View File

@@ -456,7 +456,7 @@ static void program_interrupt_signal(int sig)
/*
* check given device name for blanks and some special characters
*/
static void get_device_name(dasdfmt_info_t *info, char *name, int argc,
static void get_device_name(dasdfmt_info_t *info, char *devname, int argc,
char *argv[])
{
struct util_proc_dev_entry dev_entry;
@@ -470,32 +470,20 @@ static void get_device_name(dasdfmt_info_t *info, char *name, int argc,
ERRMSG_EXIT(EXIT_MISUSE, "%s: No device specified!\n",
prog_name);
if (info->device_id < argc) {
strcpy(info->devname, argv[info->device_id]);
} else {
if ((strchr(name, ' ') != NULL) || (strchr(name, '#') != NULL) ||
(strchr(name, '[') != NULL) || (strchr(name, ']') != NULL) ||
(strchr(name, '!') != NULL) || (strchr(name, '>') != NULL) ||
(strchr(name, '(') != NULL) || (strchr(name, '<') != NULL) ||
(strchr(name, ')') != NULL) || (strchr(name, ':') != NULL) ||
(strchr(name, '&') != NULL) || (strchr(name, ';') != NULL))
ERRMSG_EXIT(EXIT_MISUSE, "%s: Your filename contains "
"blanks or special characters!\n",
prog_name);
if (strlen(argv[info->device_id]) >= PATH_MAX)
ERRMSG_EXIT(EXIT_MISUSE, "%s: device name too long!\n",
prog_name);
strcpy(devname, argv[info->device_id]);
strncpy(info->devname, name, PATH_MAX - 1);
info->devname[PATH_MAX - 1] = '\0';
}
if (stat(info->devname, &dev_stat) != 0)
if (stat(devname, &dev_stat) != 0)
ERRMSG_EXIT(EXIT_MISUSE, "%s: Could not get information for "
"device node %s: %s\n", prog_name, info->devname,
"device node %s: %s\n", prog_name, devname,
strerror(errno));
if (minor(dev_stat.st_rdev) & PARTN_MASK) {
ERRMSG_EXIT(EXIT_MISUSE, "%s: Unable to format partition %s. "
"Please specify a device.\n", prog_name,
info->devname);
devname);
}
if (util_proc_dev_get_entry(dev_stat.st_rdev, 1, &dev_entry) == 0) {
@@ -505,7 +493,7 @@ static void get_device_name(dasdfmt_info_t *info, char *name, int argc,
prog_name, dev_entry.name);
} else {
printf("%s WARNING: Unable to get driver name for device node %s",
prog_name, info->devname);
prog_name, devname);
}
}
@@ -586,7 +574,7 @@ static void check_layout(dasdfmt_info_t *info, unsigned int intensity)
/*
* check for disk type and set some variables (e.g. usage count)
*/
static void check_disk(dasdfmt_info_t *info)
static void check_disk(dasdfmt_info_t *info, char *devname)
{
int ro, errno_save;
@@ -609,13 +597,13 @@ static void check_disk(dasdfmt_info_t *info)
if (strncmp(info->dasd_info.type, "ECKD", 4) != 0) {
ERRMSG_EXIT(EXIT_FAILURE,
"%s: Unsupported disk type\n%s is not an "
"ECKD disk!\n", prog_name, info->devname);
"ECKD disk!\n", prog_name, devname);
}
if (dasd_sys_raw_track_access(info->devname)) {
if (dasd_sys_raw_track_access(devname)) {
ERRMSG_EXIT(EXIT_FAILURE,
"%s: Device '%s' is in raw-track access mode\n",
prog_name, info->devname);
prog_name, devname);
}
}
@@ -935,7 +923,8 @@ static format_data_t ask_user_for_blksize(format_data_t params)
/*
* print all information needed to format the device
*/
static void dasdfmt_print_info(dasdfmt_info_t *info, volume_label_t *vlabel,
static void dasdfmt_print_info(dasdfmt_info_t *info, char *devname,
volume_label_t *vlabel,
unsigned int cylinders, unsigned int heads,
format_data_t *p)
{
@@ -945,7 +934,7 @@ static void dasdfmt_print_info(dasdfmt_info_t *info, volume_label_t *vlabel,
cylinders, heads, (cylinders * heads));
printf("\nI am going to format the device ");
printf("%s in the following way:\n", info->devname);
printf("%s in the following way:\n", devname);
printf(" Device number of device : 0x%x\n", info->dasd_info.devno);
printf(" Labelling device : %s\n",
(info->writenolabel) ? "no" : "yes");
@@ -1376,7 +1365,8 @@ static void dasdfmt_quick_format(dasdfmt_info_t *info, unsigned int cylinders,
disk_disabled = 0;
}
static void do_format_dasd(dasdfmt_info_t *info, volume_label_t *vlabel,
static void do_format_dasd(dasdfmt_info_t *info, char *devname,
volume_label_t *vlabel,
format_data_t *p, unsigned int cylinders,
unsigned int heads)
{
@@ -1399,19 +1389,19 @@ static void do_format_dasd(dasdfmt_info_t *info, volume_label_t *vlabel,
}
if ((info->verbosity > 0) || !info->withoutprompt || info->testmode)
dasdfmt_print_info(info, vlabel, cylinders, heads, p);
dasdfmt_print_info(info, devname, vlabel, cylinders, heads, p);
count = u2s_get_host_access_count(info->devname);
count = u2s_get_host_access_count(devname);
if (info->force_host) {
if (count > 1) {
ERRMSG_EXIT(EXIT_FAILURE,
"\n%s: Disk %s is online on OS instances in %d different LPARs.\n"
"Note: Your installation might include z/VM systems that are configured to\n"
"automatically vary on disks, regardless of whether they are subsequently used.\n\n",
prog_name, info->devname, count);
prog_name, devname, count);
} else if (count < 0) {
ERRMSG("\nHosts access information not available for disk %s.\n\n",
info->devname);
devname);
return;
}
} else if (count > 1)
@@ -1420,7 +1410,7 @@ static void do_format_dasd(dasdfmt_info_t *info, volume_label_t *vlabel,
"Ensure that the disk is not being used by a system outside your LPAR.\n"
"Note: Your installation might include z/VM systems that are configured to\n"
"automatically vary on disks, regardless of whether they are subsequently used.\n",
info->devname, count);
devname, count);
if (!info->testmode) {
if (!info->withoutprompt) {
@@ -1471,7 +1461,6 @@ int main(int argc, char *argv[])
{
dasdfmt_info_t info = {
.dasd_info = {0},
{0}
};
volume_label_t vlabel;
char old_volser[7];
@@ -1648,10 +1637,10 @@ int main(int argc, char *argv[])
get_device_name(&info, dev_filename, argc, argv);
filedes = open(info.devname, O_RDWR);
filedes = open(dev_filename, O_RDWR);
if (filedes == -1)
ERRMSG_EXIT(EXIT_FAILURE, "%s: Unable to open device %s: %s\n",
prog_name, info.devname, strerror(errno));
prog_name, dev_filename, strerror(errno));
get_device_info(&info);
@@ -1675,16 +1664,16 @@ int main(int argc, char *argv[])
exit(1);
}
if (dasdfmt_get_volser(info.devname,
if (dasdfmt_get_volser(dev_filename,
&info.dasd_info, old_volser) == 0)
vtoc_volume_label_set_volser(&vlabel, old_volser);
else
ERRMSG_EXIT(EXIT_FAILURE,
"%s: VOLSER not found on device %s\n",
prog_name, info.devname);
prog_name, dev_filename);
}
check_disk(&info);
check_disk(&info, dev_filename);
if (check_param(str, ERR_LENGTH, &format_params) < 0)
ERRMSG_EXIT(EXIT_MISUSE, "%s: %s\n", prog_name, str);
@@ -1695,7 +1684,8 @@ int main(int argc, char *argv[])
if (info.check)
check_disk_format(&info, cylinders, heads, &format_params);
else
do_format_dasd(&info, &vlabel, &format_params, cylinders, heads);
do_format_dasd(&info, dev_filename, &vlabel,
&format_params, cylinders, heads);
if (close(filedes) != 0)
ERRMSG("%s: error during close: %s\ncontinuing...\n",

1
dasdfmt/dasdfmt.h
View File

@@ -291,7 +291,6 @@ typedef struct bootstrap2 {
typedef struct dasdfmt_info {
dasd_information2_t dasd_info;
char devname[PATH_MAX];
int verbosity;
int testmode;
int withoutprompt;