Before:
__sysctl("sysctl.name2oid",2,0x7fffff763a80,0x7fffff763280,0x7fffff763680,8) =
0 (0x0)
__sysctl("sysctl.oidfmt.6.2",4,0x7fffff763ae0,0x7fffff762e78,0x0,0) = 0 (0x0)
__sysctl("sysctl.name.6.2",4,0x7fffff762180,0x7fffff761d00,0x0,0) = 0 (0x0)
__sysctl("sysctl.oidfmt.6.2",4,0x7fffff762980,0x7fffff761d08,0x0,0) = 0 (0x0)
__sysctl("sysctl.oiddescr.6.2",4,0x7fffff762580,0x7fffff761d00,0x0,0) = 0 (0x0)
After:
__sysctl("sysctl.name2oid
hw.model",2,0x7fffff161e60,0x7fffff161660,0x7fffff161a60,8) = 0 (0x0)
__sysctl("sysctl.oidfmt hw.model",4,0x7fffff161ec0,0x7fffff161258,0x0,0) = 0
(0x0)
__sysctl("sysctl.name { 6.2 }",4,0x7fffff160560,0x7fffff1600e0,0x0,0) = 0 (0x0)
__sysctl("sysctl.oidfmt hw.model",4,0x7fffff160d60,0x7fffff1600e8,0x0,0) = 0
(0x0)
__sysctl("sysctl.oiddescr hw.model",4,0x7fffff160960,0x7fffff1600e0,0x0,0) = 0
(0x0)
Reminded by: mjg
> On 5 Jul 2020, at 21:53, Pawel Biernacki <kak...@freebsd.org> wrote:
>
> Author: kaktus
> Date: Sun Jul 5 19:53:54 2020
> New Revision: 362947
> URL: https://svnweb.freebsd.org/changeset/base/362947
>
> Log:
> truss: print more information about traced sysctls
>
> MFC after: 2 weeks
> Sponsored by: Mysterious Code Ltd.
>
> Modified:
> head/usr.bin/truss/syscalls.c
>
> Modified: head/usr.bin/truss/syscalls.c
> ==============================================================================
> --- head/usr.bin/truss/syscalls.c Sun Jul 5 19:38:36 2020
> (r362946)
> +++ head/usr.bin/truss/syscalls.c Sun Jul 5 19:53:54 2020
> (r362947)
> @@ -1577,14 +1577,37 @@ print_cmsgs(FILE *fp, pid_t pid, bool receive, struct
> }
>
> static void
> -print_sysctl_oid(FILE *fp, int *oid, int len)
> +print_sysctl_oid(FILE *fp, int *oid, size_t len)
> {
> - int i;
> + size_t i;
> + bool first;
>
> - for (i = 0; i < len; i++)
> - fprintf(fp, ".%d", oid[i]);
> + first = true;
> + fprintf(fp, "{ ");
> + for (i = 0; i < len; i++) {
> + fprintf(fp, "%s%d", first ? "" : ".", oid[i]);
> + first = false;
> + }
> + fprintf(fp, " }");
> }
>
> +static void
> +print_sysctl(FILE *fp, int *oid, size_t len)
> +{
> + char name[BUFSIZ];
> + int qoid[CTL_MAXNAME + 2];
> + size_t i;
> +
> + qoid[0] = CTL_SYSCTL;
> + qoid[1] = CTL_SYSCTL_NAME;
> + memcpy(qoid + 2, oid, len * sizeof(int));
> + i = sizeof(name);
> + if (sysctl(qoid, len + 2, name, &i, 0, 0) == -1)
> + print_sysctl_oid(fp, oid, len);
> + else
> + fprintf(fp, "%s", name);
> +}
> +
> /*
> * Converts a syscall argument into a string. Said string is
> * allocated via malloc(), so needs to be free()'d. sc is
> @@ -2298,9 +2321,8 @@ print_arg(struct syscall_args *sc, unsigned long *args
> break;
> case Sysctl: {
> char name[BUFSIZ];
> - int oid[CTL_MAXNAME + 2], qoid[CTL_MAXNAME + 2];
> - size_t i;
> - int len;
> + int oid[CTL_MAXNAME + 2];
> + size_t len;
>
> memset(name, 0, sizeof(name));
> len = args[sc->offset + 1];
> @@ -2314,39 +2336,35 @@ print_arg(struct syscall_args *sc, unsigned long *args
> fprintf(fp, "debug");
> break;
> case CTL_SYSCTL_NAME:
> - fprintf(fp, "name");
> + fprintf(fp, "name ");
> print_sysctl_oid(fp, oid + 2, len - 2);
> break;
> case CTL_SYSCTL_NEXT:
> fprintf(fp, "next");
> break;
> case CTL_SYSCTL_NAME2OID:
> - fprintf(fp, "name2oid");
> + fprintf(fp, "name2oid %s",
> + get_string(pid,
> + args[sc->offset + 4],
> + args[sc->offset + 5]));
> break;
> case CTL_SYSCTL_OIDFMT:
> - fprintf(fp, "oidfmt");
> - print_sysctl_oid(fp, oid + 2, len - 2);
> + fprintf(fp, "oidfmt ");
> + print_sysctl(fp, oid + 2, len - 2);
> break;
> case CTL_SYSCTL_OIDDESCR:
> - fprintf(fp, "oiddescr");
> - print_sysctl_oid(fp, oid + 2, len - 2);
> + fprintf(fp, "oiddescr ");
> + print_sysctl(fp, oid + 2, len - 2);
> break;
> case CTL_SYSCTL_OIDLABEL:
> - fprintf(fp, "oidlabel");
> - print_sysctl_oid(fp, oid + 2, len - 2);
> + fprintf(fp, "oidlabel ");
> + print_sysctl(fp, oid + 2, len - 2);
> break;
> default:
> - print_sysctl_oid(fp, oid + 1, len - 1);
> + print_sysctl(fp, oid + 1, len - 1);
> }
> } else {
> - qoid[0] = CTL_SYSCTL;
> - qoid[1] = CTL_SYSCTL_NAME;
> - memcpy(qoid + 2, oid, len * sizeof(int));
> - i = sizeof(name);
> - if (sysctl(qoid, len + 2, name, &i, 0, 0) == -1)
> - print_sysctl_oid(fp, qoid + 2, len);
> - else
> - fprintf(fp, "%s", name);
> + print_sysctl(fp, oid, len);
> }
> fprintf(fp, "\"");
> }
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