forks/busybox/libbb, branch master

lineedit: support empty PATH entries in tab completion

2021-02-23T11:20:51+00:00

Zero-length path prefixes can be specified in PATH as a leading or trailing colon or two adjacent colons. POSIX says that the use of zero-length prefixes to refer to the current directory is a legacy feature. Nonetheless the shells in BusyBox respect this feature, as does 'which'. Tab-completion of executables using PATH should support this too. function old new delta complete_cmd_dir_file 934 931 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-3) Total: -3 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

libbb: fix '--help' handling in FEATURE_SH_NOFORK=y

2021-02-18T22:30:24+00:00

Most BusyBox applets respond to the '--help' option by printing a usage message. This is normally handled by busybox_main() so applet main routines don't have support for '--help'. In standalone shell mode with FEATURE_SH_NOFORK enabled nofork applets are invoked directly, bypassing busybox_main(). This results in inconsistent handling of '--help': - applets which call getopt() report "unrecognized option '--help'" and print help anyway; - realpath says "--help: No such file or directory" and doesn't print help; - usleep says "invalid number '--help'" and doesn't print help. Avoid inconsistency by checking for '--help' in run_nofork_applet(). Bug found by Ron Yorston. function old new delta show_usage_if_dash_dash_help - 70 +70 run_nofork_applet 347 362 +15 run_applet_no_and_exit 432 365 -67 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 1/1 up/down: 85/-67) Total: 18 bytes Signed-off-by: Denys Vlasenko

ash: placate -Werror=format-security

2021-02-18T12:45:49+00:00

"In function 'sprint_status48': error: format not a string literal and no format arguments" function old new delta sprint_status48 160 158 -2 Signed-off-by: Denys Vlasenko

libbb: introduce and use fputs_stdout

2021-02-03T19:52:40+00:00

function old new delta fputs_stdout - 12 +12 zxc_vm_process 7237 7230 -7 yes_main 85 78 -7 write_block 380 373 -7 wrapf 305 298 -7 strings_main 437 430 -7 show_bridge 353 346 -7 rev_main 384 377 -7 put_prompt_custom 58 51 -7 put_cur_glyph_and_inc_cursor 168 161 -7 print_numbered_lines 152 145 -7 print_named_ascii 130 123 -7 print_name 135 128 -7 print_login_issue 386 379 -7 print_ascii 208 201 -7 powertop_main 1249 1242 -7 od_main 1789 1782 -7 logread_main 518 511 -7 head_main 804 797 -7 display_process_list 1319 1312 -7 cut_main 1002 995 -7 bb_dump_dump 1550 1543 -7 bb_ask_noecho 393 386 -7 baseNUM_main 702 695 -7 expand_main 755 745 -10 dumpleases_main 497 487 -10 write1 12 - -12 putcsi 37 23 -14 print_login_prompt 55 41 -14 paste_main 525 511 -14 cat_main 440 426 -14 print_it 245 230 -15 print_addrinfo 1188 1171 -17 print_rule 770 750 -20 print_linkinfo 842 822 -20 httpd_main 791 771 -20 ------------------------------------------------------------------------------ (add/remove: 1/1 grow/shrink: 0/34 up/down: 12/-341) Total: -329 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

libbb: code shrink fgets_str

2021-02-03T19:43:07+00:00

Use a NULL value of maxsz_p to indicate to xmalloc_fgets_internal() that the caller doesn't care about the maximum size of the buffer. This allows the default maximum size to be set once in xmalloc_fgets_internal() instead of separately in each caller. function old new delta xmalloc_fgets_internal 273 287 +14 xmalloc_fgets_str 30 9 -21 xmalloc_fgetline_str 33 12 -21 xmalloc_fgets_str_len 38 10 -28 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/3 up/down: 14/-70) Total: -56 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

nl: ensure '-b n' option displays file content

2021-02-02T16:37:41+00:00

The command 'nl -b n' should output no line numbers, just some spaces as a placeholder followed by the actual file content. Add tests for line numbering by cat and nl. The correct results were obtained from coreutils. function old new delta print_numbered_lines 152 157 +5 .rodata 182456 182453 -3 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 1/1 up/down: 5/-3) Total: 2 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

libbb: code shrink and speed up index_in_strings()

2021-02-02T13:37:37+00:00

Rewrite index_in_strings() to replace calls to strcmp()/strlen(). With this change searching for valid names in the applet_names array (for example) is 40% faster. The code has to assume the strings aren't sorted, so will always scan the entire array when presented with an invalid name. function old new delta index_in_strings 63 56 -7 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-7) Total: -7 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

libbb: code shrink and speed up find_applet_by_name()

2021-02-02T13:16:38+00:00

find_applet_by_name() determines the appropriate range of applet indices to check for the given name and performs a linear search in applet_names[]. Revise the code so the index of the upper bound of the range, 'max', isn't calculated. Instead check the value of the first non-matching character to see if we've reached the end of the range. This new code speeds up the time to find a valid applet name by 6% and halves the time to detect that a given name is invalid. The average time to detect an invalid name is now the same as for a valid one. function old new delta find_applet_by_name 155 133 -22 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-22) Total: -22 bytes Signed-off-by: Ron Yorston Signed-off-by: Denys Vlasenko

update_passwd: fix context variable

2021-01-14T16:03:25+00:00

Commit https://git.busybox.net/busybox/commit/libbb/update_passwd.c?id=2496616b0a8d1c80cd1416b73a4847b59b9f969a changed the variable used from context to seuser but forgot this change resulting in build errors detected by buildroot autobuilders: http://autobuild.buildroot.net/results/b89/b89b7d0f0601bb706e76cea31cf4e43326e5540c//build-end.log libbb/update_passwd.c:51:11: error: 'context' undeclared (first use in this function); did you mean 'ucontext'? freecon(context); Signed-off-by: Bernd Kuhls Signed-off-by: Denys Vlasenko

Fix missing "crypt.h" compilation error on the FreeBSD

2021-01-04T12:28:28+00:00

FreeBSD does not use crypt.h, but unistd.h which is already included Signed-off-by: Alex Samorukov Signed-off-by: Denys Vlasenko