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authorTavian Barnes <tavianator@tavianator.com>2020-09-18 16:48:53 -0400
committerTavian Barnes <tavianator@tavianator.com>2020-09-18 16:48:53 -0400
commit0aa71f890777d2aaddeca53384b94742e4b2678b (patch)
treedf44e7c577d733b4d219fe2d8d18ce139c92e2bd /util.c
parent72cfcb1fa636017611ce0aeddbe2970003a01cfa (diff)
downloadbfs-0aa71f890777d2aaddeca53384b94742e4b2678b.tar.xz
util: Make the initial allocation bigger for xreadlinkat()
Most symlinks are more than 1 character long, so rather than wasting time with 1, 2, 4, ... when we don't have a good guess for the length, start with a bigger one. Credit to https://twitter.com/RichFelker/status/1306321019108556806 for reminding me of this.
Diffstat (limited to 'util.c')
-rw-r--r--util.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/util.c b/util.c
index 0ac1f7a..715396c 100644
--- a/util.c
+++ b/util.c
@@ -59,10 +59,15 @@ int xreaddir(DIR *dir, struct dirent **de) {
}
char *xreadlinkat(int fd, const char *path, size_t size) {
- ++size; // NUL-terminator
ssize_t len;
char *name = NULL;
+ if (size == 0) {
+ size = 64;
+ } else {
+ ++size; // NUL terminator
+ }
+
while (true) {
char *new_name = realloc(name, size);
if (!new_name) {