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parse-util: allow tweaking how to parse integers

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This allows disabling a few alternative ways to decode integers
formatted as strings, for safety reasons.

See: #15991
This commit is contained in:
Lennart Poettering
2020-06-05 15:56:31 +02:00
parent 0ce8092109
commit 707e93aff8
2 changed files with 58 additions and 13 deletions
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src/basic/parse-util.h
+6
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@@ -21,6 +21,12 @@ int parse_range(const char *t, unsigned *lower, unsigned *upper);
int parse_errno(const char *t);
int parse_syscall_and_errno(const char *in, char **name, int *error);
#define SAFE_ATO_REFUSE_PLUS_MINUS (1U << 30)
#define SAFE_ATO_REFUSE_LEADING_ZERO (1U << 29)
#define SAFE_ATO_REFUSE_LEADING_WHITESPACE (1U << 28)
#define SAFE_ATO_ALL_FLAGS (SAFE_ATO_REFUSE_PLUS_MINUS|SAFE_ATO_REFUSE_LEADING_ZERO|SAFE_ATO_REFUSE_LEADING_WHITESPACE)
#define SAFE_ATO_MASK_FLAGS(base) ((base) & ~SAFE_ATO_ALL_FLAGS)
int safe_atou_full(const char *s, unsigned base, unsigned *ret_u);
static inline int safe_atou(const char *s, unsigned *ret_u) {