prometheus_sysctl_exporter: Replace magic numbers with identifiers.
Identifiers make it clearer what is going on and makes it easier to find consumers of sysctl functionality. No functional change. MFC after: 3 days Reviewed by: asomers Differential Revision: https://reviews.freebsd.org/D39797
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@ -62,7 +62,7 @@ static void
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oid_get_root(struct oid *o)
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{
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o->id[0] = 1;
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o->id[0] = CTL_KERN;
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o->len = 1;
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}
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@ -91,8 +91,8 @@ oid_get_next(const struct oid *cur, struct oid *next)
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int lookup[CTL_MAXNAME + 2];
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size_t nextsize;
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lookup[0] = 0;
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lookup[1] = 2;
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lookup[0] = CTL_SYSCTL;
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lookup[1] = CTL_SYSCTL_NEXT;
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memcpy(lookup + 2, cur->id, cur->len * sizeof(lookup[0]));
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nextsize = sizeof(next->id);
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if (sysctl(lookup, 2 + cur->len, &next->id, &nextsize, 0, 0) != 0) {
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@ -135,8 +135,8 @@ oid_get_format(const struct oid *o, struct oidformat *of)
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int lookup[CTL_MAXNAME + 2];
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size_t oflen;
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lookup[0] = 0;
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lookup[1] = 4;
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lookup[0] = CTL_SYSCTL;
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lookup[1] = CTL_SYSCTL_OIDFMT;
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memcpy(lookup + 2, o->id, o->len * sizeof(lookup[0]));
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oflen = sizeof(*of);
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if (sysctl(lookup, 2 + o->len, of, &oflen, 0, 0) != 0) {
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@ -344,8 +344,8 @@ oid_get_name(const struct oid *o, struct oidname *on)
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size_t i, len;
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/* Fetch the name and split it up in separate components. */
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lookup[0] = 0;
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lookup[1] = 1;
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lookup[0] = CTL_SYSCTL;
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lookup[1] = CTL_SYSCTL_NAME;
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memcpy(lookup + 2, o->id, o->len * sizeof(lookup[0]));
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len = sizeof(on->names);
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if (sysctl(lookup, 2 + o->len, on->names, &len, 0, 0) != 0)
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@ -464,8 +464,8 @@ oid_get_description(const struct oid *o, struct oiddescription *od)
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char *newline;
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size_t odlen;
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lookup[0] = 0;
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lookup[1] = 5;
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lookup[0] = CTL_SYSCTL;
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lookup[1] = CTL_SYSCTL_OIDDESCR;
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memcpy(lookup + 2, o->id, o->len * sizeof(lookup[0]));
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odlen = sizeof(od->description);
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if (sysctl(lookup, 2 + o->len, &od->description, &odlen, 0, 0) != 0) {
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