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systemd/1094-udev-avoid-magic-constants-in-kernel-cmdline-parsers.patch

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Based on cfe2061add5479710f6597899d632e64c54e62ef Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@gmail.com>
Date: Wed, 5 Nov 2014 12:56:49 +0100
Subject: [PATCH] udev: avoid magic constants in kernel-cmdline parsers
Lets recognize the fact that startswith() returns a pointer to the tail on
success. Use it instead of hard-coding string-lengths as magic constants.
---
src/udev/udevd.c | 24 ++++++++++++------------
1 file changed, 12 insertions(+), 12 deletions(-)
--- src/udev/udevd.c
+++ src/udev/udevd.c 2014-11-10 12:31:15.745519116 +0000
@@ -984,7 +984,7 @@ static void kernel_cmdline_options(struc
return;
FOREACH_WORD_QUOTED(w, l, line, state) {
- char *s, *opt;
+ char *s, *opt, *value;
s = strndup(w, l);
if (!s)
@@ -996,24 +996,24 @@ static void kernel_cmdline_options(struc
else
opt = s;
- if (startswith(opt, "udev.log-priority=")) {
+ if ((value = startswith(opt, "udev.log-priority="))) {
int prio;
- prio = util_log_priority(opt + 18);
+ prio = util_log_priority(value);
log_set_max_level(prio);
udev_set_log_priority(udev, prio);
- } else if (startswith(opt, "udev.children-max=")) {
- r = safe_atoi(opt + 18, &children_max);
+ } else if ((value = startswith(opt, "udev.children-max="))) {
+ r = safe_atoi(value, &children_max);
if (r < 0)
- log_warning("Invalid udev.children-max ignored: %s", opt + 18);
- } else if (startswith(opt, "udev.exec-delay=")) {
- r = safe_atoi(opt + 16, &exec_delay);
+ log_warning("Invalid udev.children-max ignored: %s", value);
+ } else if ((value = startswith(opt, "udev.exec-delay="))) {
+ r = safe_atoi(value, &exec_delay);
if (r < 0)
- log_warning("Invalid udev.exec-delay ignored: %s", opt + 16);
- } else if (startswith(opt, "udev.event-timeout=")) {
- r = safe_atou64(opt + 19, &event_timeout_usec);
+ log_warning("Invalid udev.exec-delay ignored: %s", value);
+ } else if ((value = startswith(opt, "udev.event-timeout="))) {
+ r = safe_atou64(value, &event_timeout_usec);
if (r < 0) {
- log_warning("Invalid udev.event-timeout ignored: %s", opt + 19);
+ log_warning("Invalid udev.event-timeout ignored: %s", value);
break;
}
event_timeout_usec *= USEC_PER_SEC;