DoxigAlpha
std › zig › system.glibcVerFromRPath

glibcVerFromRPath

Function parameters

Parameters

#
rpath:[]const u8

Type definitions in this namespace

Types

#

Return whether or not the given host is capable of running executables of

Functions

#
getExternalExecutor
Return whether or not the given host is capable of running executables of
resolveTargetQuery
Given a `Target.Query`, which specifies in detail which parts of the

Error sets in this namespace

Error Sets

#

Source

Implementation

#
fn glibcVerFromRPath(rpath: []const u8) !std.SemanticVersion {
    var dir = fs.cwd().openDir(rpath, .{}) catch |err| switch (err) {
        error.NameTooLong => unreachable,
        error.InvalidUtf8 => unreachable, // WASI only
        error.InvalidWtf8 => unreachable, // Windows-only
        error.BadPathName => unreachable,
        error.DeviceBusy => unreachable,
        error.NetworkNotFound => unreachable, // Windows-only

        error.FileNotFound,
        error.NotDir,
        error.AccessDenied,
        error.PermissionDenied,
        error.NoDevice,
        => return error.GLibCNotFound,

        error.ProcessNotFound,
        error.ProcessFdQuotaExceeded,
        error.SystemFdQuotaExceeded,
        error.SystemResources,
        error.SymLinkLoop,
        error.Unexpected,
        => |e| return e,
    };
    defer dir.close();

    // Now we have a candidate for the path to libc shared object. In
    // the past, we used readlink() here because the link name would
    // reveal the glibc version. However, in more recent GNU/Linux
    // installations, there is no symlink. Thus we instead use a more
    // robust check of opening the libc shared object and looking at the
    // .dynstr section, and finding the max version number of symbols
    // that start with "GLIBC_2.".
    const glibc_so_basename = "libc.so.6";
    var f = dir.openFile(glibc_so_basename, .{}) catch |err| switch (err) {
        error.NameTooLong => unreachable,
        error.InvalidUtf8 => unreachable, // WASI only
        error.InvalidWtf8 => unreachable, // Windows only
        error.BadPathName => unreachable, // Windows only
        error.PipeBusy => unreachable, // Windows-only
        error.SharingViolation => unreachable, // Windows-only
        error.NetworkNotFound => unreachable, // Windows-only
        error.AntivirusInterference => unreachable, // Windows-only
        error.FileLocksNotSupported => unreachable, // No lock requested.
        error.NoSpaceLeft => unreachable, // read-only
        error.PathAlreadyExists => unreachable, // read-only
        error.DeviceBusy => unreachable, // read-only
        error.FileBusy => unreachable, // read-only
        error.WouldBlock => unreachable, // not using O_NONBLOCK
        error.NoDevice => unreachable, // not asking for a special device

        error.AccessDenied,
        error.PermissionDenied,
        error.FileNotFound,
        error.NotDir,
        error.IsDir,
        => return error.GLibCNotFound,

        error.FileTooBig => return error.Unexpected,

        error.ProcessNotFound,
        error.ProcessFdQuotaExceeded,
        error.SystemFdQuotaExceeded,
        error.SystemResources,
        error.SymLinkLoop,
        error.Unexpected,
        => |e| return e,
    };
    defer f.close();

    return glibcVerFromSoFile(f) catch |err| switch (err) {
        error.InvalidElfMagic,
        error.InvalidElfEndian,
        error.InvalidElfClass,
        error.InvalidElfFile,
        error.InvalidElfVersion,
        error.InvalidGnuLibCVersion,
        error.UnexpectedEndOfFile,
        => return error.GLibCNotFound,

        error.SystemResources,
        error.UnableToReadElfFile,
        error.Unexpected,
        error.FileSystem,
        error.ProcessNotFound,
        => |e| return e,
    };
}