Commit Graph

22 Commits

Author SHA1 Message Date
Laslo Hunhold a18439af11 Refactor swap.c to use getline() instead of buf-filling
This drops a lot of code and even though we are using a common function,
the specification of only the needed things keeps it very efficient and
even more efficient in memory and time than the previous solution.
2018-05-28 22:21:34 +02:00
Laslo Hunhold 7f91ce265e swap.c: Refactor getstats() and its usage
Add a return value so we are able to check any errors and actually fail
when there has been a critical error instead of carrying on uselessly.
2018-05-21 23:05:39 +02:00
Aaron Marcher 10dbc9543e Merge fmt_human_2 and fmt_human_10 to one function
Now only one function, fmt_human, takes an additional argument "base".
2018-05-21 14:44:21 +02:00
Aaron Marcher ec5c35ec9f Remove units from numbers
This is a first step to decouple formatting from information because of
two reasons:

 1. The components should only gather and return the values by design
 2. Fine grained user control should be a focus

Scaling will be implemented in a different way in a later commit.
2018-05-21 00:16:54 +02:00
Aaron Marcher 4bd234c7ef swap_perc: check for division by zero on obsd too 2018-05-21 00:02:33 +02:00
Aaron Marcher 806815778f swap_perc: check for division by zero 2018-05-20 23:53:26 +02:00
Laslo Hunhold 46c4540dd2 Implement fmt_human_2() and fmt_human_10()
These functions take the raw number and a unit and automatically
print it out "scaled down" to a proper SI-prefix, for powers of 2
and 10 respectively.

Apply them to the 2-power cases and keep the 10-power for a later
commit.
2018-05-19 22:58:21 +02:00
Aaron Marcher 74c4f4ebda Add the percent sign to *_perc functions
Units should be added to the corresponding numbers
2018-05-19 20:33:06 +02:00
Aaron Marcher 39ee31c242 Implement fmt_scaled for swap_* functions 2018-05-18 23:19:18 +02:00
Laslo Hunhold 80fc20d1d6 Add warn() and die()
Given slstatus is a tool that runs in the background, most likely run
from .xinitrc, it's important to prepend the name of the tool to error
messages so it becomes clear where the error is coming from.

To make this much more consistent, this commit adds warn() and die()
utility functions consistent with other suckless projects and adapts all
calls to fprintf(stderr, *) to the warn() and die() functions, greatly
increasing the readability of the code.
2018-05-18 11:13:05 +02:00
Tobias Tschinkowitz c1f79d741a corrected calculation for swap on openbsd
The swapctl(2) function fills the swapent struct with 512KB blocks.
As we want to display in GB, i just modified the calculation for this to
get the expected output.
2018-05-16 19:17:49 +02:00
Aaron Marcher ee5ec75621 Fix coding style
- Use block for single statement ifs
- Keep lines to reasonable length (current debate as to reasonable)
- When functions return -1 for error test against 0 not -1
- Do not indent cases another level
- Do not test against NULL and 0 explicitly
- Use tabs for indentation, use spaces for alignment
2018-05-06 22:28:56 +02:00
Aaron Marcher efb41724b5 swap_*: Port to OpenBSD 2018-05-06 01:20:46 +02:00
Laslo Hunhold 19343ff343 components/swap.c | move duplicated code to separate function 2018-05-01 20:24:13 +02:00
Laslo Hunhold 9750a3d731 Use indentation to increase readability
Granted, this style is definitely not common, but for the short
utility-functions of this program it's just the right choice. This
provides great flexibility, such that in the long run, it will be
possible to also share code between the OS-implementations.

This also keeps the state-keeping at a minimum and makes it clearer
which functions are implemented on which OS without having to jiggle
around with too many files in the process.
2018-05-01 19:43:49 +02:00
Laslo Hunhold 42edfea89a Revert component-split
this reverts the commits from 92ab9ef52e up to
d42870d6ca.

After heavy consideration, the component split has more disadvantages
than advantages, especially given there will be utility-functions
sharing quite a lot of code that would then need to be duplicated, as it
does not fit into the util.c due to its speciality.

One big advantage of the component-wise build is readability, and
without doubt, this was achieved here. This point will be addressed
with a different approach that will be visible in the upcoming commits.

One big disadvantage of the component build is the fact that it
introduces state to the build process which is not necessary. Before its
introduction, the only influencing factors where the system-defines
__linux__ and __OpenBSD__. With the components, we are also relying on
the output of uname(1).
Additionally, if the os.mk is not present, make gives the output

     $ make
     Makefile:5: os.mk: No such file or directory
     make: *** No rule to make target 'os.mk'.  Stop.

This could easily be fixed by providing some sort of meta-rule for this
file, however, it indicates the problem we have here, and this entire
statefulness will heavily complicate packaging of this tool and makes
the build process much more complex than it actually has to be.
2018-05-01 19:43:34 +02:00
Quentin Rameau 72f5a0d69a swap: OS split 2018-04-30 15:41:52 +02:00
Aaron Marcher faa52bdcc0 Format error messages properly
Make use of strerror(errno) and format all errors equally:
function ['parameters']: error message
2018-03-28 19:46:27 +02:00
Aaron Marcher 96f3a8a54e Get rid of err.h as it is not portable
Replace warn() and warnx() with fprintf() and add <stdio.h> where
necessary.
2018-03-28 18:26:56 +02:00
Aaron Marcher e79d4932ea More robust preprocessor switches
Replace #ifdef with #if defined() and #elif with #elif defined() as it
should only test if it is defined or not.
2018-03-21 12:21:37 +01:00
Aaron Marcher ebf5a35052 Build Linux-only functions only on Linux 2018-03-18 23:26:13 +01:00
Laslo Hunhold 7246dc4381
Move components into dedicated subdirectory
This brings us a lot more tidiness.
2017-09-24 17:20:27 +02:00