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| author | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-10-16 18:08:36 +0000 |
|---|---|---|
| committer | moneromooo-monero <moneromooo-monero@users.noreply.github.com> | 2018-10-17 09:31:34 +0000 |
| commit | c77439298591792601f8c3f4c94950ef6e2c542a (patch) | |
| tree | af4aa7da9819246934bf30677c590ad55985de30 /src/common/util.cpp | |
| parent | 5c85da5a73424017ea9c340a0412f90356d77358 (diff) | |
| download | monzero-core-c77439298591792601f8c3f4c94950ef6e2c542a.tar.gz monzero-core-c77439298591792601f8c3f4c94950ef6e2c542a.tar.xz monzero-core-c77439298591792601f8c3f4c94950ef6e2c542a.zip | |
spawn: close all file descriptors before execve
No need to give whatever we're calling access to what we use
Diffstat (limited to 'src/common/util.cpp')
| -rw-r--r-- | src/common/util.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/common/util.cpp b/src/common/util.cpp index 2a1d49af0..9afeb2607 100644 --- a/src/common/util.cpp +++ b/src/common/util.cpp @@ -28,6 +28,7 @@ // // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers +#include <unistd.h> #include <cstdio> #ifdef __GLIBC__ @@ -967,4 +968,23 @@ std::string get_nix_version_display_string() } #endif + void closefrom(int fd) + { +#if defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__ || defined __DragonFly__ + ::closefrom(fd); +#else +#if defined __GLIBC__ + const int sc_open_max = sysconf(_SC_OPEN_MAX); + const int MAX_FDS = std::min(65536, sc_open_max); +#else + const int MAX_FDS = 65536; +#endif + while (fd < MAX_FDS) + { + close(fd); + ++fd; + } +#endif + } + } |