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xattr-util: document that we NUL suffix

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This commit is contained in:
Lennart Poettering
2019-07-25 17:10:51 +02:00
parent 63d59b8dcf
commit 5373172e80
1 changed files with 2 additions and 4 deletions
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src/basic/xattr-util.c
+2 -4
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@@ -27,7 +27,7 @@ int getxattr_malloc(const char *path, const char *name, char **value, bool allow
assert(name);
assert(value);
for (l = 100; ; l = (size_t) n + 1) {
for (l = 100; ; l = (size_t) n + 1 /* extra byte to make sure this remains NUL suffixed */) {
v = new0(char, l);
if (!v)
return -ENOMEM;
@@ -36,7 +36,6 @@ int getxattr_malloc(const char *path, const char *name, char **value, bool allow
n = lgetxattr(path, name, v, l);
else
n = getxattr(path, name, v, l);
if (n >= 0 && (size_t) n < l) {
*value = v;
return n;
@@ -65,13 +64,12 @@ int fgetxattr_malloc(int fd, const char *name, char **value) {
assert(name);
assert(value);
for (l = 100; ; l = (size_t) n + 1) {
for (l = 100;; l = (size_t) n + 1 /* extra byte to make sure this remains NUL suffixed */) {
v = new0(char, l);
if (!v)
return -ENOMEM;
n = fgetxattr(fd, name, v, l);
if (n >= 0 && (size_t) n < l) {
*value = v;
return n;