Remarks are about unsurprising things but it's good to give feedback
on them; "mistakes" are unexpected things, and get colored like an
error; and information is something that the user requested and thus
needs to stay on the status bar until the next keystroke.
And in the bargain elide a variable, and make it clearer
what the return value is at two early exit points.
[This change makes use of the fact that TRUE (successful write) == 1
and FALSE (failed write) == 0. But this is already used twenty lines
earlier, for the other call of write_file().]
The tiny version is about being small, not about convenience features
that hardly anyone uses anyway.
Also exclude the description of the "+line[,column]" feature -- it is
unneeded verbosity.
This addresses https://savannah.gnu.org/bugs/?59101.
The cursor would disappear after any message on the status bar --
for example, also when M-W is typed and nothing is found -- so the
mitigation trick needs to be performed in statusline() itself.
This addresses https://savannah.gnu.org/bugs/?59091.
For some reason, when running a tiny nano built with Slang on the bterm
of a Debian installer image, the cursor disappears when certain things
are written to the status bar. Make the cursor reappear by rewriting
the two help lines with dummy items (and then rewriting it again with
the normal menu in the central loop). Of course, this does not help
when the user uses -x or --nohelp to suppress the help lines, but at
least in the default setup the cursor doesn't get hidden now and then.
This mitigates https://savannah.gnu.org/bugs/?59091.
Bug existed since before version 2.2.4.
This is the opposite of what 'ls' does in a UTF-8 locale, but nano
has never followed the collating rules of Unicode (uppercase after
lowercase, ignoring punctuation, and so on) -- it would be strange
to change that now.
Until now, nano left such equivalent names unsorted, in a seemingly
random order.
This fixes https://savannah.gnu.org/bugs/?59059.
Bug existed since before version 2.0.6.
Those casts are redundant, and sometimes ugly. And as the types of
variables are extremely unlikely to change any more at this point,
the protection they offer against miscompilations is moot.
Signed-off-by: Hussam al-Homsi <sawuare@gmail.com>
After commit 59bbc0b8 from five days ago (that made a divergent pipe
failure to be treated in the same way as the other two), this became
possible without having two different pipe-failure messages.
Between an endwin() and a doupdate() there should be no calls of
statusline() or statusbar() -- these two functions may be called
only when in curses mode.
This fixes https://savannah.gnu.org/bugs/?58868.
Bug existed since version 4.3, commit 57390cff.
While ignoring permission errors from fchmod() and fchown() is okay
(since normal users are not always privileged to make such changes),
ignoring also more serious errors (like EIO) is not ideal.
Signed-off-by: Michalis Kokologiannakis <michalis@mpi-sws.org>
When there is just one match when <Tab> is pressed, and this match
is a directory, then a slash is added to 'shared', overwriting the
terminating NUL character. So, strcpy() cannot be used for copying
this 'shared' string, but strncpy() is needed, and the result needs
to be NUL terminated afterward.
This fixes https://savannah.gnu.org/bugs/?58826.
Bug existed since commit b0f56398 from eleven days ago.
Root has carte blanche to both read unreadable files and write
unwritable files -- the file system does not prevent this. So,
alert root when opening a file that is intended to be read-only.
This fulfills https://savannah.gnu.org/bugs/?58685.
Requested-by: Marius Bakke <mbakke@fastmail.com>
Rereading is unlikely to fail, but *if* it fails, maybe there is a
serious problem and the user wants to try and fix it before saving
the buffer and thus overwriting the original file.
After thinking about it, I don't like it that nano makes an unrequested
failsafe backup: in the vast, vast majority of cases it is a waste both
of time and of disk wear. If the user is worried about data loss, they
can use --backup. The fsync() after writing out the buffer (added in
commit a84cdaaa) already reduces the chances on data loss somewhat.
This change moves the code responsible for backup creation to a new,
separate function, backup_file(). This function returns a boolean
indicating whether saving the buffer should proceed or not.
Signed-off-by: Michalis Kokologiannakis <michalis@mpi-sws.org>
The file-saving procedure that nano followed was not crash-safe
under ext4 (and perhaps other filesystems) when editing existing
files. Specifically, modifying an existing file could lead to data
loss, since a modified file is not replaced atomically on disk.
Using "-B" did not ensure crash-safety either since the backup might
not have persisted on disk when the writeout of the file started.
In addition, if I/O pressure filled up the remaining disk space
after an existing file is truncated during save, nano would not
be able to finish saving the file, which would remain truncated.
This change addresses these issues by making nano do the following:
1) Make a temporary backup of the file being written so that there
is no time window such that (a) an existing file is truncated, and
(b) the buffer corresponding to said file has not been flushed to
disk. Such time windows are dangerous because, under certain
circumstances, they can lead to data loss on some filesystems.
The backup is made by copying the original file, and a second
attempt to HOME is made in case that first copy fails.
2) Use fsync() so that, when the save finishes, it is certain
that the file has been successfully written to disk.
This addresses https://savannah.gnu.org/bugs/?58642.
Signed-off-by: Michalis Kokologiannakis <michalis@mpi-sws.org>
