tree eb04b58688a7cb58548947faa6ce010f5da28898
parent 2f61a4427255c3debe7e0a56df838b21fbd00bc5
author Anisse Astier <aastier@freebox.fr> 1549274382 +0100
committer Will Deacon <will.deacon@arm.com> 1549641847 +0000

builtin-run: Fix warning when resolving path

GCC 8.2 gives this warning:

builtin-run.c: In function ‘kvm_run_write_sandbox_cmd.isra.1’:
builtin-run.c:417:28: error: ‘%s’ directive output may be truncated writing up to 4095 bytes into a region of size 4091 [-Werror=format-truncation=]
   snprintf(dst, len, "/host%s", resolved_path);
                            ^~   ~~~~~~~~~~~~~

It's because it understands that len is PATH_MAX, the same as
resolved_path's size. This patch handles the case where the string is
truncated, and fixes the warning.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Anisse Astier <aastier@freebox.fr>
Signed-off-by: Will Deacon <will.deacon@arm.com>