Replace almost all uses of enum connection_state with struct
connection_status. This removes the assumption that errno values used
by the system are between 0 and 100000. The GNU Hurd uses values like
ENOENT = 0x40000002 and EMIG_SERVER_DIED = -308.
This commit is derived from my attachments 450 and 467 to bug 1013.
I am reverting all /dev/fd recognition because of bug 917.
This reverts commit c283f8cfd9,
except src/protocol/file/file.c still needs #include "osdep/osdep.h"
for STRING_DIR_SEP.
Without this patch, ELinks showed garbage at
<http://www.dwheeler.com/oss_fs_why.html> when bzip2 decompression was
enabled. safe_read() in bzip2_read() did not see all of the body
bytes that ELinks had received from the server. After bzip2_read()
received EAGAIN from safe_read() and returned 0, something skipped
1460 bytes.
decompress_data() apparently assumed that read_encoded() returning 0
meant the end of the file, and returned even though len still was
nonzero, i.e. it had not yet written to the pipe all the data that
the caller (read_chunked_http_data() or read_normal_http_data()) had
provided. The caller did not know this, and discarded the data.
(cherry picked from commit 7e5e05ca60)
Without this patch, ELinks showed garbage at
<http://www.dwheeler.com/oss_fs_why.html> when bzip2 decompression was
enabled. safe_read() in bzip2_read() did not see all of the body
bytes that ELinks had received from the server. After bzip2_read()
received EAGAIN from safe_read() and returned 0, something skipped
1460 bytes.
decompress_data() apparently assumed that read_encoded() returning 0
meant the end of the file, and returned even though len still was
nonzero, i.e. it had not yet written to the pipe all the data that
the caller (read_chunked_http_data() or read_normal_http_data()) had
provided. The caller did not know this, and discarded the data.
This function was unused and only the dummy backend implemented it
correctly. Fixing bug 534 will probably require adding this function
back again, but I think it will be easier to do it from scratch than
fix the bogus implementations we had here.
