External/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2024-07-12 12:55:46 +00:00
Code Issues Packages Projects Releases Wiki Activity

virsh: Refactor parseRateStr to avoid false-positive uninitialized variable

Browse Source 
Commit 6983d6d2 tried to improve parseRateStr but broke the build
instead for compilers that were not able to properly introspect the for
loop indexed by the enum resulting into the following error:

virsh-domain.c: In function 'parseRateStr':
virsh-domain.c:916:13: error: 'field_name' may be used uninitialized in this function [-Werror=maybe-uninitialized]
             vshError(ctl, _("malformed %s field"), field_name);
             ^
virsh-domain.c:915:13: error: 'tmp' may be used uninitialized in this function [-Werror=maybe-uninitialized]
         if (virStrToLong_ullp(token, NULL, 10, tmp) < 0) {
             ^
Rather than trying to fix the code, refactor the function again by
reusing virStringSplit.
This commit is contained in:
Peter Krempa 2015-08-12 07:31:33 +02:00
parent c7790408d7
commit 73ca6f98a3
1 changed files with 34 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
tools/virsh-domain.c
View File

@ -863,67 +863,49 @@ static const vshCmdOptDef opts_attach_interface[] = {
};
/* parse inbound and outbound which are in the format of
* 'average,peak,burst', in which peak and burst are optional,
* 'average,peak,burst,floor', in which peak and burst are optional,
* thus 'average,,burst' and 'average,peak' are also legal. */
static int parseRateStr(vshControl *ctl,
const char *rateStr,
virNetDevBandwidthRatePtr rate)
#define VSH_PARSE_RATE_FIELD(index, name) \
do { \
if (index < ntok && \
*tok[index] != '\0' && \
virStrToLong_ullp(tok[index], NULL, 10, &rate->name) < 0) { \
vshError(ctl, _("field '%s' is malformed"), #name); \
goto cleanup; \
} \
} while (0)
static int
vshParseRateStr(vshControl *ctl,
const char *rateStr,
virNetDevBandwidthRatePtr rate)
{
char *token;
char *next;
char *saveptr = NULL;
enum {
AVERAGE, PEAK, BURST, FLOOR
} state;
char **tok = NULL;
size_t ntok;
int ret = -1;
if (!rateStr)
if (!(tok = virStringSplitCount(rateStr, ",", 0, &ntok)))
return -1;
next = vshStrdup(ctl, rateStr);
for (state = AVERAGE; state <= FLOOR; state++) {
unsigned long long *tmp;
const char *field_name;
if (!(token = strtok_r(next, ",", &saveptr)))
break;
next = NULL;
switch (state) {
case AVERAGE:
tmp = &rate->average;
field_name = "average";
break;
case PEAK:
tmp = &rate->peak;
field_name = "peak";
break;
case BURST:
tmp = &rate->burst;
field_name = "burst";
break;
case FLOOR:
tmp = &rate->floor;
field_name = "floor";
break;
}
if (virStrToLong_ullp(token, NULL, 10, tmp) < 0) {
vshError(ctl, _("malformed %s field"), field_name);
goto cleanup;
}
if (ntok > 4) {
vshError(ctl, _("Rate string '%s' has too many fields"), rateStr);
goto cleanup;
}
VSH_PARSE_RATE_FIELD(0, average);
VSH_PARSE_RATE_FIELD(1, peak);
VSH_PARSE_RATE_FIELD(2, burst);
VSH_PARSE_RATE_FIELD(3, floor);
ret = 0;
cleanup:
VIR_FREE(next);
virStringFreeList(tok);
return ret;
}
#undef VSH_PARSE_RATE_FIELD
static bool
cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
{
@ -979,7 +961,7 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
if (inboundStr) {
memset(&inbound, 0, sizeof(inbound));
if (parseRateStr(ctl, inboundStr, &inbound) < 0)
if (vshParseRateStr(ctl, inboundStr, &inbound) < 0)
goto cleanup;
if (!inbound.average && !inbound.floor) {
vshError(ctl, _("either inbound average or floor is mandatory"));
@ -988,7 +970,7 @@ cmdAttachInterface(vshControl *ctl, const vshCmd *cmd)
}
if (outboundStr) {
memset(&outbound, 0, sizeof(outbound));
if (parseRateStr(ctl, outboundStr, &outbound) < 0)
if (vshParseRateStr(ctl, outboundStr, &outbound) < 0)
goto cleanup;
if (outbound.average == 0) {
vshError(ctl, _("outbound average is mandatory"));
@ -3307,7 +3289,7 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd)
memset(&outbound, 0, sizeof(outbound));
if (inboundStr) {
if (parseRateStr(ctl, inboundStr, &inbound) < 0)
if (vshParseRateStr(ctl, inboundStr, &inbound) < 0)
goto cleanup;
/* we parse the rate as unsigned long long, but the API
* only accepts UINT */
@ -3349,7 +3331,7 @@ cmdDomIftune(vshControl *ctl, const vshCmd *cmd)
}
if (outboundStr) {
if (parseRateStr(ctl, outboundStr, &outbound) < 0)
if (vshParseRateStr(ctl, outboundStr, &outbound) < 0)
goto cleanup;
if (outbound.average > UINT_MAX || outbound.peak > UINT_MAX ||
outbound.burst > UINT_MAX) {