stagit

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commit edee68f398f5b190f4be0127338956c0a2500662
parent b5607f75afb9c6e6e6ab49128f9760d3538809cd
Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date:   Sun,  1 Dec 2019 18:31:07 +0100

add OpenBSD unveil support

The unveil() system call first appeared in OpenBSD 6.4.

For stagit it has the following properties now:

- stagit-index: only read-access to the file-system for the specified
  directories/repositories.
- stagit: read-access to the specified directory/repository.
  read-write and creation access to the current directory for the output files.
  read-write and creation access to the specified cache file.

Diffstat:
M
stagit-index.c
 | 
3
+++
M
stagit.c
 | 
7
+++++++

2 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/stagit-index.c b/stagit-index.c
@@ -159,6 +159,9 @@ main(int argc, char *argv[])
     git_libgit2_init();
 
 #ifdef __OpenBSD__
+    for (i = 1; i < argc; i++)
+        if (unveil(argv[i], "r") == -1)
+            err(1, "unveil: %s", argv[i]);
     if (pledge("stdio rpath", NULL) == -1)
         err(1, "pledge");
 #endif
diff --git a/stagit.c b/stagit.c
@@ -1095,6 +1095,13 @@ main(int argc, char *argv[])
     git_libgit2_init();
 
 #ifdef __OpenBSD__
+    if (unveil(repodir, "r") == -1)
+        err(1, "unveil: %s", repodir);
+    if (unveil(".", "rwc") == -1)
+        err(1, "unveil: .");
+    if (cachefile && unveil(cachefile, "rwc") == -1)
+        err(1, "unveil: %s", cachefile);
+
     if (cachefile) {
         if (pledge("stdio rpath wpath cpath fattr", NULL) == -1)
             err(1, "pledge");