From 0acb9dfe4d8c27b8e6be6ddf3943fbb9b7e4b52f Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Mon, 6 Dec 2021 06:57:10 -0500
Subject: [PATCH] use sysconf(_SC_PAGESIZE)

---
 src/man/main.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/man/main.c b/src/man/main.c
index e66fcad31..42bfd0504 100644
--- a/src/man/main.c
+++ b/src/man/main.c
@@ -122,7 +122,12 @@ map_troff_data(int fd, size_t* len){
     // the last four bytes have the uncompressed length
     uint32_t ulen;
     memcpy(&ulen, buf + *len - 4, 4);
-    size_t pgsize = 4096; // FIXME
+    long sc = sysconf(_SC_PAGESIZE);
+    if(sc <= 0){
+      fprintf(stderr, "couldn't get page size\n");
+      return NULL;
+    }
+    size_t pgsize = sc;
     void* ubuf = mmap(NULL, (ulen + pgsize - 1) / pgsize * pgsize,
                       PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
     if(ubuf == MAP_FAILED){