-/*************************************************
-* Decode bit settings for log/debug *
-*************************************************/
-
-/* This function decodes a string containing bit settings in the form of +name
-and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
-also recognizes a numeric setting of the form =<number>, but this is not
-intended for user use. It's an easy way for Exim to pass the debug settings
-when it is re-exec'ed.
-
-The log options are held in two unsigned ints (because there became too many
-for one). The top bit in the table means "put in 2nd selector". This does not
-yet apply to debug options, so the "=" facility sets only the first selector.
-
-The "all" selector, which must be equal to 0xffffffff, is recognized specially.
-It sets all the bits in both selectors. However, there is a facility for then
-unsetting certain bits, because we want to turn off "memory" in the debug case.
-
-A bad value for a debug setting is treated as an unknown option - error message
-to stderr and die. For log settings, which come from the configuration file,
-we write to the log on the way out...
-
-Arguments:
- selector1 address of the first bit string
- selector2 address of the second bit string, or NULL
- notall1 bits to exclude from "all" for selector1
- notall2 bits to exclude from "all" for selector2
- string the configured string
- options the table of option names
- count size of table
- which "log" or "debug"
-
-Returns: nothing on success - bomb out on failure
-*/
-
-static void
-decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
- int notall2, uschar *string, bit_table *options, int count, uschar *which)
-{
-uschar *errmsg;
-if (string == NULL) return;
-
-if (*string == '=')
- {
- char *end; /* Not uschar */
- *selector1 = strtoul(CS string+1, &end, 0);
- if (*end == 0) return;
- errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
- string);
- goto ERROR_RETURN;
- }
-
-/* Handle symbolic setting */
-
-else for(;;)
- {
- BOOL adding;
- uschar *s;
- int len;
- bit_table *start, *end;
-
- while (isspace(*string)) string++;
- if (*string == 0) return;
-
- if (*string != '+' && *string != '-')
- {
- errmsg = string_sprintf("malformed %s_selector setting: "
- "+ or - expected but found \"%s\"", which, string);
- goto ERROR_RETURN;
- }
-
- adding = *string++ == '+';
- s = string;
- while (isalnum(*string) || *string == '_') string++;
- len = string - s;
-
- start = options;
- end = options + count;
-
- while (start < end)
- {
- bit_table *middle = start + (end - start)/2;
- int c = Ustrncmp(s, middle->name, len);
- if (c == 0)
- {
- if (middle->name[len] != 0) c = -1; else
- {
- unsigned int bit = middle->bit;
- unsigned int *selector;
-
- /* The value with all bits set means "force all bits in both selectors"
- in the case where two are being handled. However, the top bit in the
- second selector is never set. When setting, some bits can be excluded.
- */
-
- if (bit == 0xffffffff)
- {
- if (adding)
- {
- *selector1 = 0xffffffff ^ notall1;
- if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
- }
- else
- {
- *selector1 = 0;
- if (selector2 != NULL) *selector2 = 0;
- }
- }
-
- /* Otherwise, the 0x80000000 bit means "this value, without the top
- bit, belongs in the second selector". */
-
- else
- {
- if ((bit & 0x80000000) != 0)
- {
- selector = selector2;
- bit &= 0x7fffffff;
- }
- else selector = selector1;
- if (adding) *selector |= bit; else *selector &= ~bit;
- }
- break; /* Out of loop to match selector name */
- }
- }
- if (c < 0) end = middle; else start = middle + 1;
- } /* Loop to match selector name */
-
- if (start >= end)
- {
- errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
- adding? '+' : '-', len, s);
- goto ERROR_RETURN;
- }
- } /* Loop for selector names */
-
-/* Handle disasters */
-
-ERROR_RETURN:
-if (Ustrcmp(which, "debug") == 0)
- {
- fprintf(stderr, "exim: %s\n", errmsg);
- exit(EXIT_FAILURE);
- }
-else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
-}
-
-
-
git://git.exim.org / users / jgh / exim.git / blobdiff