return v;
}
+static int envvar_match(unsigned flags, const char *en,
+ const char *const *patv,
+ const char **ev)
+{
+ const char *const *patp;
+ const char *q, *pat;
+ int acceptp;
+
+ for (patp= patv; (pat= *patp); patp++) {
+ q= en;
+ acceptp= 1;
+ if (*pat == '!' && (flags & FILTF_WILDCARD)) { acceptp= 0; pat++; }
+
+ for (;;) {
+ if (!*pat) {
+ if (*q != '=') {
+ D( if (debugmode)
+ printf(";; mismatch `%s' (prefix)\n", *patp); )
+ break;
+ }
+ D( if (debugmode) printf(";; matched pattern `%s'\n", *patp); )
+ goto match;
+ } else if (*pat == '*' && (flags & FILTF_WILDCARD)) {
+ q = strchr(q, '=');
+ if (!q) {
+ D( if (debugmode)
+ printf(";; mismatch `%s' (discard: no `=')\n", *patp); )
+ return -1;
+ }
+ D( if (debugmode)
+ printf(";; wildcard match for `%s'\n", *patp); )
+ goto match;
+ } else {
+ if (*pat++ != *q++) {
+ D( if (debugmode) printf(";; mismatch `%s'\n", *patp); )
+ break;
+ }
+ }
+ }
+ }
+ return 0;
+
+match:
+ if (!acceptp) return -1;
+ *ev= q + 1;
+ return +1;
+}
+
void filter_environment(unsigned flags, const char *prefix_in,
const char *const *patv,
void (*foundone)(const char *fulln,
void *p)
{
char *const *ep;
- const char *const *patp;
- const char *en, *ev, *pat, *q;
+ const char *en, *ev;
char enbuf[MAX_ENVVAR_NAME];
size_t n, pn = strlen(prefix_in);
- int acceptp;
D( if (debugmode) printf(";; filter_environment...\n"); )
for (ep= environ; (en= *ep); ep++) {
D( if (debugmode) printf(";; consider env-var `%s'\n", en); )
if (strncmp(en, prefix_in, pn) != 0 || !en[pn]) {
D( if (debugmode) printf(";; doesn't match prefix\n"); )
- goto next_ev;
+ continue;
}
- for (patp= patv; (pat= *patp); patp++) {
- q= en + pn;
- acceptp= 1;
- if (*pat == '!' && (flags & FILTF_WILDCARD)) {
- acceptp= 0; pat++;
- }
- for (;;) {
- if (!*pat) {
- if (*q != '=') {
- D( if (debugmode)
- printf(";; mismatch `%s' (prefix)\n", *patp); )
- goto next_pat;
- }
- D( if (debugmode) printf(";; matched `%s'\n", *patp); )
- ev = q + 1;
- break;
- } else if (*pat == '*' && (flags & FILTF_WILDCARD)) {
- q = strchr(q, '=');
- if (!q) {
- D( if (debugmode)
- printf(";; mismatch `%s' (discard: no `=')\n", *patp); )
- goto next_ev;
- }
- D( if (debugmode)
- printf(";; wildcard match for `%s'\n", *patp); )
- ev = q + 1;
- break;
- } else
- if (*pat++ != *q++) {
- D( if (debugmode) printf(";; mismatch `%s'\n", *patp); )
- goto next_pat;
- }
- }
- if (acceptp) {
- n= q - en;
- if (n >= sizeof(enbuf))
- error("environment variable name too long");
- memcpy(enbuf, en, n);
- enbuf[n]= 0;
- D( if (debugmode)
- printf(";; full = `%s'; tail = `%s'; value = `%s'\n",
- enbuf, enbuf + pn, ev); )
- foundone(enbuf, enbuf + pn, ev, p);
- } D( else if (debugmode)
- printf(";; matched negated pattern\n"); )
- goto next_ev;
- next_pat:;
+ if (envvar_match(flags, en + pn, patv, &ev) > 0) {
+ n= strcspn(en, "=");
+ if (n >= sizeof(enbuf))
+ error("environment variable name too long");
+ memcpy(enbuf, en, n);
+ enbuf[n]= 0;
+ D( if (debugmode)
+ printf(";; full = `%s'; tail = `%s'; value = `%s'\n",
+ enbuf, enbuf + pn, ev); )
+ foundone(enbuf, enbuf + pn, ev, p);
}
- next_ev:;
}
}