bcb837b8c7
The procfs mount option subset=pid only shows the processes, not things
such as /proc/stat etc.
For certain programs, this should mean they still work, but have reduced
functionality. This is the first cut at some of them.
pgrep - Removed always loading uptime which we never used anyway. The
program now works fine unless we use --older. Add note in man page
stating it will silently fail.
ps - Load boot time and memory total only when required instead of
always. Changed the error messages to something the user actually
cares about "can't get system boot time" vs "create a structure".
Works for most fields except starts and percent memory.
uptime - Give more useful error messages if uptime not available.
vmstat - move header generation after testing for required proc
files, makes the default output more consistent with the rest
of the options.
References:
procps-ng/procps#227
https://www.kernel.org/doc/html/latest/filesystems/proc.html#chapter-4-configuring-procfs
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| .. | ||
| common.h | ||
| COPYING | ||
| display.c | ||
| global.c | ||
| HACKING | ||
| help.c | ||
| output.c | ||
| parser.c | ||
| ps.1 | ||
| regression | ||
| select.c | ||
| sortformat.c | ||
| stacktrace.c | ||