busybox.git/procps, branch master

pgrep/pkill: fix -x to also match comm field

2025-11-08T06:42:34+00:00

When running `pgrep -x example` against a process `/bin/example --arg`,
BusyBox fails to match, while GNU pgrep succeeds. The reason is that the
comparison is done only against the full argv[0] rather than comm. This
patch changes pgrep -x to also try /proc/[pid]/comm for exact matching.

function                                             old     new   delta
pgrep_main                                           681     670     -11

Signed-off-by: Paulius Zaleckas 
Signed-off-by: Denys Vlasenko

top,pmap: speed up /smaps parsing

2025-08-06T12:42:06+00:00

function                                             old     new   delta
procps_read_smaps                                    515     529     +14
procps_get_maps                                      685     665     -20
.rodata                                           105847  105820     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 14/-47)            Total: -33 bytes

Signed-off-by: Denys Vlasenko

libbb: make read_cmdline() replace chars 1..31 with '?', not space

2025-08-06T12:02:05+00:00

Space was too inconspicuous on output

Signed-off-by: Denys Vlasenko

top: simplify command line reading

2025-08-05T22:42:05+00:00

function                                             old     new   delta
cmdline_to_line_buf_and_print                          -      48     +48
read_cmdline                                         326     327      +1
display_topmem_process_list                          523     505     -18
display_process_list                                1186    1161     -25
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 1/2 up/down: 49/-43)              Total: 6 bytes

Signed-off-by: Denys Vlasenko

top: disentangle printing logic

2025-08-05T22:05:44+00:00

function                                             old     new   delta
print_line_buf                                         -      78     +78
print_line_bold                                        -      50     +50
top_main                                            1043    1091     +48
handle_input                                         708     714      +6
do_stats                                             186     192      +6
.rodata                                           115543  115526     -17
display_topmem_process_list                          748     523    -225
display_process_list                                1432    1186    -246
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 3/3 up/down: 188/-488)         Total: -300 bytes

Signed-off-by: Denys Vlasenko

top: consistently NOT use the last column of the display

2025-08-05T17:37:43+00:00

function                                             old     new   delta
.rodata                                           115537  115543      +6
top_main                                            1047    1043      -4
display_process_list                                1459    1432     -27
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/2 up/down: 6/-31)             Total: -25 bytes

Signed-off-by: Denys Vlasenko

pmap: increase max handled command line length to 4k

2025-08-05T12:35:14+00:00

function                                             old     new   delta
procps_get_maps                                      181     779    +598
read_smaps                                           563       -    -563
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 598/-563)           Total: 35 bytes

Signed-off-by: Denys Vlasenko

top,pmap: do not use common code for reading /proc/PID/smaps

2025-08-05T12:21:51+00:00

The logic is in fact quite far from common.

While at it, stop accounting "---p" mappings as mapped (e.g. VSZ in top).
Nothing is mapped there (why would kernel waste RAM to map pages
which can't be accessed?).

function                                             old     new   delta
read_smaps                                             -     562    +562
read_cmdline                                         315     326     +11
print_smaprec                                         97     101      +4
procps_scan                                         1219    1211      -8
.rodata                                           115541  115533      -8
skip_whitespace_if_prefixed_with                      25       -     -25
procps_read_smaps                                    864     577    -287
------------------------------------------------------------------------------
(add/remove: 1/1 grow/shrink: 2/3 up/down: 577/-328)          Total: 249 bytes

Signed-off-by: Denys Vlasenko

top: improve response time to keyboard input

2025-08-05T02:30:59+00:00

function                                             old     new   delta
handle_input                                         674     708     +34
top_main                                            1019    1047     +28
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/0 up/down: 62/0)               Total: 62 bytes

Signed-off-by: Denys Vlasenko

top: reduce flicker: redraw screen with "clear to EOL" commands, not one "clear screen"

2025-08-05T01:40:36+00:00

function                                             old     new   delta
display_topmem_process_list                          680     748     +68
display_process_list                                1403    1459     +56
.rodata                                           115512  115541     +29
top_main                                            1014    1019      +5
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 158/0)             Total: 158 bytes

Signed-off-by: Denys Vlasenko