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common/utils: Fix is_number("") to return FALSE

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Previously, it was possible to enter ‘ ’ (a space) at a number prompt,
and it would be stripped, passed to is_number() (which would erroneously
return TRUE), then passed to strtol() and the return value used
unconditionally.

Fix that by fixing is_number() to return FALSE for the empty string.

Signed-off-by: Philip Withnall <withnall@endlessm.com>
This commit is contained in:
Philip Withnall
2017-09-18 10:08:15 +01:00
committed by Alexander Larsson
parent 2d0ceef446
commit 2faffecc42
1 changed files with 3 additions and 0 deletions
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3
common/flatpak-utils.c
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@@ -5320,6 +5320,9 @@ flatpak_yes_no_prompt (const char *prompt, ...)
static gboolean
is_number (const char *s)
{
if (*s == '\0')
return FALSE;
while (*s != 0)
{
if (!g_ascii_isdigit (*s))