Messages in this thread Patch in this message | | | From | Balbir Singh <> | Date | Mon, 11 Sep 2006 13:10:43 +0530 | Subject | [RFC][PATCH -mm] Fix getdelays.c - cpumask length and error reporting. |
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Fix the length passed while (un)registering cpumask. We were passing sizeof the array, make it strlen().
Error value printed in fatal errors should be derived from the message. The message contains an nlmsgerr embedded with an error value. We must report that value to the user.
Signed-off-by: Balbir Singh <balbir@in.ibm.com> ---
Documentation/accounting/getdelays.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-)
diff -puN Documentation/accounting/getdelays.c~taskstats-fix-delayacct-utility Documentation/accounting/getdelays.c --- linux-2.6.18-rc6/Documentation/accounting/getdelays.c~taskstats-fix-delayacct-utility 2006-09-11 12:43:50.000000000 +0530 +++ linux-2.6.18-rc6-balbir/Documentation/accounting/getdelays.c 2006-09-11 12:46:57.000000000 +0530 @@ -285,7 +285,7 @@ int main(int argc, char *argv[]) if (maskset) { rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, TASKSTATS_CMD_ATTR_REGISTER_CPUMASK, - &cpumask, sizeof(cpumask)); + &cpumask, strlen(cpumask) + 1); PRINTF("Sent register cpumask, retval %d\n", rc); if (rc < 0) { printf("error sending register cpumask\n"); @@ -315,7 +315,8 @@ int main(int argc, char *argv[]) } if (msg.n.nlmsg_type == NLMSG_ERROR || !NLMSG_OK((&msg.n), rep_len)) { - printf("fatal reply error, errno %d\n", errno); + struct nlmsgerr *err = NLMSG_DATA(&msg); + printf("fatal reply error, errno %d\n", err->error); goto done; } @@ -383,7 +384,7 @@ done: if (maskset) { rc = send_cmd(nl_sd, id, mypid, TASKSTATS_CMD_GET, TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK, - &cpumask, sizeof(cpumask)); + &cpumask, strlen(cpumask) + 1); printf("Sent deregister mask, retval %d\n", rc); if (rc < 0) err(rc, "error sending deregister cpumask\n"); _ --
Balbir Singh, Linux Technology Center, IBM Software Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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