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better error message when os_file_overwrite fails

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This commit is contained in:
Andrew Kelley 2019-04-02 15:21:08 -04:00
parent 27e31f0475
commit 0cccba71d4
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GPG Key ID: 7C5F548F728501A9
3 changed files with 25 additions and 3 deletions
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5
src/error.cpp
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@ -45,6 +45,11 @@ const char *err_str(Error err) {
case ErrorUnknownOperatingSystem: return "unrecognized operating system";
case ErrorUnknownABI: return "unrecognized C ABI";
case ErrorInvalidFilename: return "invalid filename";
case ErrorDiskQuota: return "disk space quota exceeded";
case ErrorDiskSpace: return "out of disk space";
case ErrorUnexpectedWriteFailure: return "unexpected write failure";
case ErrorUnexpectedSeekFailure: return "unexpected seek failure";
case ErrorUnexpectedFileTruncationFailure: return "unexpected file truncation failure";
}
return "(invalid error)";
}

5
src/error.hpp
View File

@ -47,6 +47,11 @@ enum Error {
ErrorUnknownOperatingSystem,
ErrorUnknownABI,
ErrorInvalidFilename,
ErrorDiskQuota,
ErrorDiskSpace,
ErrorUnexpectedWriteFailure,
ErrorUnexpectedSeekFailure,
ErrorUnexpectedFileTruncationFailure,
};
const char *err_str(Error err);

18
src/os.cpp
View File

@ -2048,9 +2048,9 @@ Error os_file_overwrite(OsFile file, Buf *contents) {
return ErrorNone;
#else
if (lseek(file, 0, SEEK_SET) == -1)
return ErrorFileSystem;
return ErrorUnexpectedSeekFailure;
if (ftruncate(file, 0) == -1)
return ErrorFileSystem;
return ErrorUnexpectedFileTruncationFailure;
for (;;) {
if (write(file, buf_ptr(contents), buf_len(contents)) == -1) {
switch (errno) {
@ -2060,8 +2060,20 @@ Error os_file_overwrite(OsFile file, Buf *contents) {
zig_unreachable();
case EBADF:
zig_unreachable();
default:
case EFAULT:
zig_unreachable();
case EDQUOT:
return ErrorDiskQuota;
case ENOSPC:
return ErrorDiskSpace;
case EFBIG:
return ErrorFileTooBig;
case EIO:
return ErrorFileSystem;
case EPERM:
return ErrorAccess;
default:
return ErrorUnexpectedWriteFailure;
}
}
return ErrorNone;