Hello, can you review my patch below? On Thursday 12 April 2018 20:52:21 Pali Rohár wrote: > Function strtod() sets strtod_error to the pointer of the first invalid > character and therefore it does not have to be first character from input. > When input is valid then it points to nul byte. Conversion error is > indicated by setted errno. Zero-length argument and zero DPI is invalid > too. > > Update also error message about invalid argument. > > Signed-off-by: Pali Rohár <pali.ro...@gmail.com> > --- > xrandr.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-) > > diff --git a/xrandr.c b/xrandr.c > index 7f1e867..1960bbf 100644 > --- a/xrandr.c > +++ b/xrandr.c > @@ -3115,9 +3115,10 @@ main (int argc, char **argv) > } > if (!strcmp ("--dpi", argv[i])) { > char *strtod_error; > - if (++i >= argc) argerr ("%s requires an argument\n", argv[i-1]); > + if (++i >= argc || !argv[i][0]) argerr ("%s requires an > argument\n", argv[i-1]); > + errno = 0; > dpi = strtod(argv[i], &strtod_error); > - if (argv[i] == strtod_error) > + if (*strtod_error || errno || dpi == 0) > { > dpi = 0.0; > dpi_output_name = argv[i]; > @@ -3567,7 +3568,7 @@ main (int argc, char **argv) > XRROutputInfo *output_info; > XRRModeInfo *mode_info; > if (!dpi_output) > - fatal ("Cannot find output %s\n", dpi_output_name); > + fatal ("%s is not valid DPI nor valid output\n", > dpi_output_name); > output_info = dpi_output->output_info; > mode_info = dpi_output->mode_info; > if (output_info && mode_info && output_info->mm_height)
-- Pali Rohár pali.ro...@gmail.com
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