If the -s option was the first option on the command line, free
would report seconds argument failed. This only appeared on the
Debian free, not the one in git.
Closer examination revealed that if a valid float string is
given to strtof() it doesn't set errno to 0, but just leaves it
alone. As we are explicitly testing errno for overflows, this
means the previous errno change is picked up here.
The simple answer is to set errno to 0 before calling strtof().
References:
https://bugs.debian/org/733758https://enc.com.au/2015/08/08/be-careful-with-errno/
Free always used 1024 based units but used the confusing old style
kilo,mega etc.
This change changes the names to kibi,mebi for 1024 based divisors
and kilo,mega for 1000 based divisors or IEC units.
It also checks if you try to set two units, e.g free -k -m
Petabyte and Pebibyte have been added.
If you used to use the long options such as --mega these will now
actually print megabytes (they previously printed mebibytes).
The short options are being used on the IEC units
References: https://www.gitorious.org/procps/procps/merge_requests/38
Signed-off-by: Craig Small <csmall@enc.com.au>
For some reason I thought the columns are left justified
and consequently modified the header incorrectly when
implementing the -w/--wide feature.
With this commit the column width was increased by 1
so that the default layout is 79 characters wide
and allows to display 11 digits per column.
With introduction of the 'available' column
and with the latest changes in the 'used' evaluation
the -/+ buffers/cache line became redundant.
The first value duplicates the 'used'
column and the second value has a more accurate
brother called 'available'.
This renames the --available switch
to the --wide switch and changes the default
layout so that it includes the 'available'
column and joins buffers and cache into
a common column called 'buff/cache'.
This commit adds a new switch -a/--available that
appends a new column called 'available' to the
output. The column displays an estimation
of how much memory is available for starting
new applications, without swapping. Unlike the data
provided by the 'cached' or 'free' fields, this
field takes into account page cache and also that
not all reclaimable memory slabs will be reclaimed
due to items being in use.
For portabiliy, check for program_invocation_name during configure and
define HAVE_PROGRAM_INVOCATION_NAME accordingly. Use of this symbol is
now enclosed with the appropriate #ifdef block.
The symbol program_invocation_name is only used for error message
handling using error(), so it's safe to omit this if it is not
available.
If stream status is not checked at the end of execution below problem
would not report error, or non-zero exit code. The uptime is just an
example same was true with all commands of the project.
$ uptime >&- ; echo $?
uptime: write error: Bad file descriptor
1
$ uptime >/dev/full ; echo $?
uptime: write error: No space left on device
1
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
The strtol_or_err() already check argument is not larger than
LONG_MAX. This commit also removes clang warning.
free.c:262:55: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare]
if (args.repeat_counter < 1 || args.repeat_counter > ULONG_MAX/2)
~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Bug-Debian: http://bugs.debian.org/654368
On systems with very large amonut of RAM when they use the -b or --bytes
option on free you get overflow and free shows a negative amount of
memory, which is obviously wrong.
The handling of the -c (count) option in free uses the standard string
handling and error utils. The program also checks for negative counts
and errors on these.
err and warn are BSD format but they are not recommended by library
developers. However their consiseness is useful!
The solution is to use some macros that create xerr etc which then
just map to the error() function. The next problem is error() uses
program_invocation_name so we set this to program_invovation_short_name
This is a global set but seems to be the convention (or at least errors
are on the short name only) used everywhere else.
Support long options, use program_invocation_short_name, print
version up on request, new giga & tera byte sizes switches, exit
when numeric arguments has garbage... and for rest see the diff.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
