libs/libv4l/patches/030-getsubopt.patch

   1 POSIX says that behavior when subopts list is empty is undefined.
   2 musl libs will set value to NULL which leads to crash.
   3
   4 Simply avoid getsubopt, since we cannot rely on it.
   5
   6 diff --git a/utils/v4l2-ctl/v4l2-ctl-common.cpp b/utils/v4l2-ctl/v4l2-ctl-common.cpp
   7 index 3ea6cd3..291fb3e 100644
   8 --- a/utils/v4l2-ctl/v4l2-ctl-common.cpp
   9 +++ b/utils/v4l2-ctl/v4l2-ctl-common.cpp
  10 @@ -692,16 +692,17 @@ static bool parse_subset(char *optarg)
  11
  12  static bool parse_next_subopt(char **subs, char **value)
  13  {
  14 -       static char *const subopts[] = {
  15 -           NULL
  16 -       };
  17 -       int opt = getsubopt(subs, subopts, value);
  18 +       char *p = *subs;
  19 +       *value = *subs;
  20
  21 -       if (opt < 0 || *value)
  22 -               return false;
  23 -       fprintf(stderr, "No value given to suboption <%s>\n",
  24 -                       subopts[opt]);
  25 -       return true;
  26 +       while (*p && *p != ',')
  27 +               p++;
  28 +
  29 +       if (*p)
  30 +               *p++ = '\0';
  31 +
  32 +       *subs = p;
  33 +       return false;
  34  }
  35
  36  void common_cmd(int ch, char *optarg)