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Do not keep MappedFile fd opened

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According to the mmap man page this is not necessary, and this avoids
exposing the fd.
This commit is contained in:
Maxime Coste 2022-02-18 20:24:23 +11:00
parent e04a14cf73
commit 0e572589f3
2 changed files with 4 additions and 8 deletions
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7
src/file.cc
View File

@ -208,7 +208,7 @@ String read_file(StringView filename, bool text)
MappedFile::MappedFile(StringView filename) MappedFile::MappedFile(StringView filename)
: data{nullptr} : data{nullptr}
{ {
fd = open(filename.zstr(), O_RDONLY | O_NONBLOCK); int fd = open(filename.zstr(), O_RDONLY | O_NONBLOCK);
if (fd == -1) if (fd == -1)
throw file_access_error(filename, strerror(errno)); throw file_access_error(filename, strerror(errno));
@ -222,16 +222,13 @@ MappedFile::MappedFile(StringView filename)
data = (const char*)mmap(nullptr, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0); data = (const char*)mmap(nullptr, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (data == MAP_FAILED) if (data == MAP_FAILED)
throw file_access_error{filename, strerror(errno)}; throw file_access_error{filename, strerror(errno)};
close(fd);
} }
MappedFile::~MappedFile() MappedFile::~MappedFile()
{
if (fd != -1)
{ {
if (data != nullptr) if (data != nullptr)
munmap((void*)data, st.st_size); munmap((void*)data, st.st_size);
close(fd);
}
} }
MappedFile::operator StringView() const MappedFile::operator StringView() const

1
src/file.hh
View File

@ -49,7 +49,6 @@ struct MappedFile
operator StringView() const; operator StringView() const;
int fd;
const char* data; const char* data;
struct stat st {}; struct stat st {};
}; };