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crucible: Allow setting a relative path option for name_fd()

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This commit adds an option to store a relative path in prepartion for
more human-friendly log output.

Signed-off-by: Kai Krakow <kai@kaishome.de>
This commit is contained in:
Kai Krakow 2017-11-12 15:42:37 +01:00
parent 71514e7229
commit 755f16a948
2 changed files with 26 additions and 1 deletions
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4
include/crucible/fd.h
View File

@ -57,6 +57,10 @@ namespace crucible {
typedef ResourceHandle<int, IOHandle> Fd;
static string __relative_path;
void set_relative_path(string path);
string relative_path();
// Functions named "foo_or_die" throw exceptions on failure.
// Attempt to open the file with the given mode

23
lib/fd.cc
View File

@ -527,6 +527,22 @@ namespace crucible {
THROW_ERROR(runtime_error, "readlink: maximum buffer size exceeded");
}
string
relative_path()
{
return __relative_path;
}
void
set_relative_path(string path)
{
path = path + "/";
for (string::size_type i = path.find("//"); i != string::npos; i = path.find("//")) {
path.erase(i, 1);
}
__relative_path = path;
}
// Turn a FD into a human-recognizable filename OR an error message.
string
name_fd(int fd)
@ -534,7 +550,12 @@ namespace crucible {
try {
ostringstream oss;
oss << "/proc/self/fd/" << fd;
return readlink_or_die(oss.str());
string path = readlink_or_die(oss.str());
if (!__relative_path.empty() && 0 == path.find(__relative_path))
{
path.erase(0, __relative_path.length());
}
return path;
} catch (exception &e) {
return string(e.what());
}