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author | Alyssa Ross <hi@alyssa.is> | 2021-01-10 07:13:44 +0000 |
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committer | Alyssa Ross <hi@alyssa.is> | 2021-01-12 14:07:16 +0000 |
commit | e2698550456abba83c6dcd5d5e5a9990a0b96f8a (patch) | |
tree | 79a56f0df3fa55e470d84b4dff6059fbf487ec18 /nixpkgs/pkgs/development/libraries/attr | |
parent | 1cdc42df888dc98c347e03bd942ed9825a55bcb3 (diff) | |
parent | 84d74ae9c9cbed73274b8e4e00be14688ffc93fe (diff) | |
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Merge commit '84d74ae9c9cbed73274b8e4e00be14688ffc93fe'
Diffstat (limited to 'nixpkgs/pkgs/development/libraries/attr')
-rw-r--r-- | nixpkgs/pkgs/development/libraries/attr/default.nix | 5 | ||||
-rw-r--r-- | nixpkgs/pkgs/development/libraries/attr/syscall.patch | 120 |
2 files changed, 121 insertions, 4 deletions
diff --git a/nixpkgs/pkgs/development/libraries/attr/default.nix b/nixpkgs/pkgs/development/libraries/attr/default.nix index d8afa5a7de12..d69d475f7370 100644 --- a/nixpkgs/pkgs/development/libraries/attr/default.nix +++ b/nixpkgs/pkgs/development/libraries/attr/default.nix @@ -19,10 +19,7 @@ stdenv.mkDerivation rec { patches = [ # fix fakechroot: https://github.com/dex4er/fakechroot/issues/57 - (fetchurl { - url = "https://git.savannah.nongnu.org/cgit/attr.git/patch/?id=14adc898a36948267bfe5c63b399996879e94c98"; - sha256 = "0gja54fz79a9ma6b4mprnjxq77l5yg2z9xknlwhmkcrfnam02qxp"; - }) + ./syscall.patch ]; postPatch = '' diff --git a/nixpkgs/pkgs/development/libraries/attr/syscall.patch b/nixpkgs/pkgs/development/libraries/attr/syscall.patch new file mode 100644 index 000000000000..be2cfb3928b4 --- /dev/null +++ b/nixpkgs/pkgs/development/libraries/attr/syscall.patch @@ -0,0 +1,120 @@ +From 14adc898a36948267bfe5c63b399996879e94c98 Mon Sep 17 00:00:00 2001 +From: Andreas Gruenbacher <agruenba@redhat.com> +Date: Fri, 17 Aug 2018 14:07:31 +0200 +Subject: Switch back to syscall() + +Switch back to syscall() for the *xattr system calls. The current +mechanism of forwarding those calls to glibc breaks libraries like +libfakeroot (fakeroot) and libasan (the gcc address sanitizer; gcc +-fsanitize=address). + +Those libraries provide wrappers for functions defined in other shared +libraries, usually glibc, do their own processing, and forward calls to +the original symbols looke dup via dlsym(RTLD_NEXT, "symbol_name"). In +our case, dlsym returns the libattr_*xattr wrappers. However, when our +wrappers try calling glibc, they end up calling the libfakeroot / +libasan wrappers instead because those override the original symbols => +recursion. + +The libattr_*xattr wrappers will only be used when symbols are looked up +at runtime (dlopen / dlsym). Programs linking against libattr will +directly use the glibc provided symbols. Therefore, the slightly worse +performance of syscall() won't affect any of the "normal" users of +libattr. +--- + libattr/syscalls.c | 26 ++++++++++++++------------ + 1 file changed, 14 insertions(+), 12 deletions(-) + +diff --git a/libattr/syscalls.c b/libattr/syscalls.c +index 3013aa0..721ad7f 100644 +--- a/libattr/syscalls.c ++++ b/libattr/syscalls.c +@@ -22,6 +22,8 @@ + + #include "config.h" + ++#include <unistd.h> ++#include <sys/syscall.h> + #include <sys/xattr.h> + + #ifdef HAVE_VISIBILITY_ATTRIBUTE +@@ -31,67 +33,67 @@ + int libattr_setxattr(const char *path, const char *name, + void *value, size_t size, int flags) + { +- return setxattr(path, name, value, size, flags); ++ return syscall(__NR_setxattr, path, name, value, size, flags); + } + + int libattr_lsetxattr(const char *path, const char *name, + void *value, size_t size, int flags) + { +- return lsetxattr(path, name, value, size, flags); ++ return syscall(__NR_lsetxattr, path, name, value, size, flags); + } + + int libattr_fsetxattr(int filedes, const char *name, + void *value, size_t size, int flags) + { +- return fsetxattr(filedes, name, value, size, flags); ++ return syscall(__NR_fsetxattr, filedes, name, value, size, flags); + } + + ssize_t libattr_getxattr(const char *path, const char *name, + void *value, size_t size) + { +- return getxattr(path, name, value, size); ++ return syscall(__NR_getxattr, path, name, value, size); + } + + ssize_t libattr_lgetxattr(const char *path, const char *name, + void *value, size_t size) + { +- return lgetxattr(path, name, value, size); ++ return syscall(__NR_lgetxattr, path, name, value, size); + } + + ssize_t libattr_fgetxattr(int filedes, const char *name, + void *value, size_t size) + { +- return fgetxattr(filedes, name, value, size); ++ return syscall(__NR_fgetxattr, filedes, name, value, size); + } + + ssize_t libattr_listxattr(const char *path, char *list, size_t size) + { +- return listxattr(path, list, size); ++ return syscall(__NR_listxattr, path, list, size); + } + + ssize_t libattr_llistxattr(const char *path, char *list, size_t size) + { +- return llistxattr(path, list, size); ++ return syscall(__NR_llistxattr, path, list, size); + } + + ssize_t libattr_flistxattr(int filedes, char *list, size_t size) + { +- return flistxattr(filedes, list, size); ++ return syscall(__NR_flistxattr, filedes, list, size); + } + + int libattr_removexattr(const char *path, const char *name) + { +- return removexattr(path, name); ++ return syscall(__NR_removexattr, path, name); + } + + int libattr_lremovexattr(const char *path, const char *name) + { +- return lremovexattr(path, name); ++ return syscall(__NR_lremovexattr, path, name); + } + + int libattr_fremovexattr(int filedes, const char *name) + { +- return fremovexattr(filedes, name); ++ return syscall(__NR_fremovexattr, filedes, name); + } + + #ifdef HAVE_VISIBILITY_ATTRIBUTE |