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From 1c8e5070d8a88f35b5577e091de66727fa785ef7 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Mon, 1 Jun 2020 17:08:38 +0200
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Subject: [PATCH] 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,
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unless the new SAFE_ATO_REFUSE_PLUS_MINUS flag is specified.
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In cases where allowing the +/- syntax shall not be allowed
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SAFE_ATO_REFUSE_PLUS_MINUS is the right flag to use, but this also means
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that -0 as only negative integer that fits into an unsigned value should
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be acceptable if the flag is not specified.
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(cherry picked from commit c78eefc13562a8fc0c22c00a6d3001af89860258)
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Related: #1848373
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---
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src/basic/parse-util.c | 8 ++++----
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1 file changed, 4 insertions(+), 4 deletions(-)
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diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
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index 6cc4fc3e57..53d181dd60 100644
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--- a/src/basic/parse-util.c
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+++ b/src/basic/parse-util.c
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@@ -416,7 +416,7 @@ int safe_atou_full(const char *s, unsigned base, unsigned *ret_u) {
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return -errno;
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- if (s[0] == '-')
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+ if (l != 0 && s[0] == '-')
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return -ERANGE;
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if ((unsigned long) (unsigned) l != l)
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return -ERANGE;
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@@ -475,7 +475,7 @@ int safe_atollu_full(const char *s, unsigned base, long long unsigned *ret_llu)
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return -errno;
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- if (*s == '-')
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+ if (l != 0 && s[0] == '-')
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return -ERANGE;
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if (ret_llu)
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@@ -517,7 +517,7 @@ int safe_atou8(const char *s, uint8_t *ret) {
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return -errno;
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- if (s[0] == '-')
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+ if (l != 0 && s[0] == '-')
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return -ERANGE;
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if ((unsigned long) (uint8_t) l != l)
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return -ERANGE;
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@@ -554,7 +554,7 @@ int safe_atou16_full(const char *s, unsigned base, uint16_t *ret) {
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return -errno;
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- if (s[0] == '-')
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+ if (l != 0 && s[0] == '-')
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return -ERANGE;
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if ((unsigned long) (uint16_t) l != l)
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return -ERANGE;
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