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parse-util: allow '-0' as alternative to '0' and '+0'

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Let's allow "-0" as alternative to "+0" and "0" when parsing integers,
unless the new SAFE_ATO_REFUSE_PLUS_MINUS flag is specified.

In cases where allowing the +/- syntax shall not be allowed
SAFE_ATO_REFUSE_PLUS_MINUS is the right flag to use, but this also means
that -0 as only negative integer that fits into an unsigned value should
be acceptable if the flag is not specified.
This commit is contained in:
Lennart Poettering 2020-06-01 17:08:38 +02:00
parent 707e93aff8
commit c78eefc135
1 changed files with 4 additions and 4 deletions
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8
src/basic/parse-util.c
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@ -392,7 +392,7 @@ int safe_atou_full(const char *s, unsigned base, unsigned *ret_u) {
return -errno;
if (!x || x == s || *x != 0)
return -EINVAL;
if (s[0] == '-')
if (l != 0 && s[0] == '-')
return -ERANGE;
if ((unsigned long) (unsigned) l != l)
return -ERANGE;
@ -451,7 +451,7 @@ int safe_atollu_full(const char *s, unsigned base, long long unsigned *ret_llu)
return -errno;
if (!x || x == s || *x != 0)
return -EINVAL;
if (*s == '-')
if (l != 0 && s[0] == '-')
return -ERANGE;
if (ret_llu)
@ -493,7 +493,7 @@ int safe_atou8(const char *s, uint8_t *ret) {
return -errno;
if (!x || x == s || *x != 0)
return -EINVAL;
if (s[0] == '-')
if (l != 0 && s[0] == '-')
return -ERANGE;
if ((unsigned long) (uint8_t) l != l)
return -ERANGE;
@ -530,7 +530,7 @@ int safe_atou16_full(const char *s, unsigned base, uint16_t *ret) {
return -errno;
if (!x || x == s || *x != 0)
return -EINVAL;
if (s[0] == '-')
if (l != 0 && s[0] == '-')
return -ERANGE;
if ((unsigned long) (uint16_t) l != l)
return -ERANGE;