From 2338f242f613c931f40b8f56d5d1cb82b0ead39b Mon Sep 17 00:00:00 2001
From: Michal Schmidt <mschmidt@redhat.com>
Date: Tue, 30 Oct 2012 10:29:40 +0100
Subject: [PATCH] shared, libsystemd-daemon: check for empty strings in strto*l
 conversions

strtol() and friends may set EINVAL if no conversion was performed, but
they are not required to do so. In practice they don't. We need to check
for it.

https://bugzilla.redhat.com/show_bug.cgi?id=870577
(cherry picked from commit f3910003bce32ebdc1dbb71fd9ca2d4b8352b563)
---
 src/libsystemd-daemon/sd-daemon.c | 4 ++--
 src/shared/conf-parser.c          | 2 +-
 src/shared/util.c                 | 8 ++++----
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/src/libsystemd-daemon/sd-daemon.c b/src/libsystemd-daemon/sd-daemon.c
index 763e079..78d156c 100644
--- a/src/libsystemd-daemon/sd-daemon.c
+++ b/src/libsystemd-daemon/sd-daemon.c
@@ -88,7 +88,7 @@ _sd_export_ int sd_listen_fds(int unset_environment) {
                 goto finish;
         }
 
-        if (!p || *p || l <= 0) {
+        if (!p || p == e || *p || l <= 0) {
                 r = -EINVAL;
                 goto finish;
         }
@@ -112,7 +112,7 @@ _sd_export_ int sd_listen_fds(int unset_environment) {
                 goto finish;
         }
 
-        if (!p || *p) {
+        if (!p || p == e || *p) {
                 r = -EINVAL;
                 goto finish;
         }
diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
index 24a853c..ea444f7 100644
--- a/src/shared/conf-parser.c
+++ b/src/shared/conf-parser.c
@@ -863,7 +863,7 @@ int config_parse_mode(
 
         errno = 0;
         l = strtol(rvalue, &x, 8);
-        if (!x || *x || errno) {
+        if (!x || x == rvalue || *x || errno) {
                 log_error("[%s:%u] Failed to parse mode value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }
diff --git a/src/shared/util.c b/src/shared/util.c
index c41b9e0..11f1ea7 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -350,7 +350,7 @@ int safe_atou(const char *s, unsigned *ret_u) {
         errno = 0;
         l = strtoul(s, &x, 0);
 
-        if (!x || *x || errno)
+        if (!x || x == s || *x || errno)
                 return errno ? -errno : -EINVAL;
 
         if ((unsigned long) (unsigned) l != l)
@@ -370,7 +370,7 @@ int safe_atoi(const char *s, int *ret_i) {
         errno = 0;
         l = strtol(s, &x, 0);
 
-        if (!x || *x || errno)
+        if (!x || x == s || *x || errno)
                 return errno ? -errno : -EINVAL;
 
         if ((long) (int) l != l)
@@ -390,7 +390,7 @@ int safe_atollu(const char *s, long long unsigned *ret_llu) {
         errno = 0;
         l = strtoull(s, &x, 0);
 
-        if (!x || *x || errno)
+        if (!x || x == s || *x || errno)
                 return errno ? -errno : -EINVAL;
 
         *ret_llu = l;
@@ -407,7 +407,7 @@ int safe_atolli(const char *s, long long int *ret_lli) {
         errno = 0;
         l = strtoll(s, &x, 0);
 
-        if (!x || *x || errno)
+        if (!x || x == s || *x || errno)
                 return errno ? -errno : -EINVAL;
 
         *ret_lli = l;