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git clone catpoint catpoint Log gph

Found at: gopher.r-36.net:70/scm/catpoint/commit/7f4f52730310c65d30761a75ded86e2d82863298.gph

tStat each file and mmap(3) only as much as is really needed - catpoint - Catpoint simple presenting software.

git clone git://r-36.net/catpoint

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---

commit 7f4f52730310c65d30761a75ded86e2d82863298

parent 78504360bf7518b5f7caadcf34ecb22187bdeeb8

Author: Ekkie

Date:   Mon,  4 May 2020 12:51:49 +0200
Stat each file and mmap(3) only as much as is really needed
Signed-off-by: Christoph Lohmann <20h@r-36.net>
Diffstat:
  catpoint.c                          |       6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
---

diff --git a/catpoint.c b/catpoint.c

t@@ -1,6 +1,7 @@
 /* $Id: catpoint.c,v 1.2 2013/03/28 12:00:48 lostd Exp $ */
 #include 
+#include 
 #include 
 #include 
t@@ -42,6 +43,7 @@ int
 main(int argc, char *argv[])
 {
         int c, i, fd;
+        struct stat statbuf;
         if (argc == 1)
                 errx(1, "usage: %s file ...", argv[0]);
t@@ -59,7 +61,9 @@ main(int argc, char *argv[])
                 fd = open(argv[i], O_RDONLY, 0);
                 if (fd == -1)
                         err(1, "open: %s", argv[i]);
-                p[i] = mmap(NULL, 0x1000, PROT_READ, MAP_PRIVATE, fd, 0);
+                if (fstat(fd, &statbuf) < 0)
+                        err(1, "fstat: %s", argv[i]);
+                p[i] = mmap(NULL, statbuf.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
                 if (p[i] == MAP_FAILED)
                         err(1, "mmap");
                 close(fd);
.


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