pmodules/bash
0
0
Fork 0
mirror of https://https.git.savannah.gnu.org/git/bash.git synced 2026-07-09 13:10:50 +02:00
Code Issues Packages Projects Releases Wiki Activity

change to behavior of '&' in pattern substitution replacement string; fix for blank lines in multiline commands saved in command history

Browse Source
This commit is contained in:
Chet Ramey
2022-01-18 10:59:53 -05:00
parent 5e6f45d9b1
commit 2a1c81bf63
31 changed files with 1596 additions and 1312 deletions
Download Patch File Download Diff File Expand all files Collapse all files
doc/bash.0
+30 -20
View File
@@ -9,7 +9,7 @@ SSYYNNOOPPSSIISS
bbaasshh [options] [command_string | file]
CCOOPPYYRRIIGGHHTT
Bash is Copyright (C) 1989-2021 by the Free Software Foundation, Inc.
Bash is Copyright (C) 1989-2022 by the Free Software Foundation, Inc.
DDEESSCCRRIIPPTTIIOONN
BBaasshh is an sshh-compatible command language interpreter that executes
@@ -1849,24 +1849,34 @@ EEXXPPAANNSSIIOONN
end of the expanded value of _p_a_r_a_m_e_t_e_r. If the expansion of
_s_t_r_i_n_g is null, matches of _p_a_t_t_e_r_n are deleted. If _s_t_r_i_n_g is
null, matches of _p_a_t_t_e_r_n are deleted and the // following _p_a_t_t_e_r_n
may be omitted. If the ppaattssuubb__rreeppllaacceemmeenntt shell option is en-
abled using sshhoopptt, any unquoted instances of && in _s_t_r_i_n_g are re-
placed with the matching portion of _p_a_t_t_e_r_n. Backslash is used
to quote && in _s_t_r_i_n_g; the backslash is removed in order to per-
mit a literal && in the replacement string. Users should take
care if _s_t_r_i_n_g is double-quoted to avoid unwanted interactions
between the backslash and double-quoting. Pattern substitution
performs the check for && after expanding _s_t_r_i_n_g; shell program-
mers should quote backslashes intended to escape the && and in-
hibit replacement so they survive any quote removal performed by
the expansion of _s_t_r_i_n_g. If the nnooccaasseemmaattcchh shell option is en-
abled, the match is performed without regard to the case of al-
phabetic characters. If _p_a_r_a_m_e_t_e_r is @@ or **, the substitution
operation is applied to each positional parameter in turn, and
the expansion is the resultant list. If _p_a_r_a_m_e_t_e_r is an array
variable subscripted with @@ or **, the substitution operation is
applied to each member of the array in turn, and the expansion
is the resultant list.
may be omitted.
If the ppaattssuubb__rreeppllaacceemmeenntt shell option is enabled using sshhoopptt,
any unquoted instances of && in _s_t_r_i_n_g are replaced with the
matching portion of _p_a_t_t_e_r_n.
Quoting any part of _s_t_r_i_n_g inhibits replacement in the expansion
of the quoted portion, including replacement strings stored in
shell variables. Backslash will escape && in _s_t_r_i_n_g; the back-
slash is removed in order to permit a literal && in the replace-
ment string. Backslash can also be used to escape a backslash;
\\\\ results in a literal backslash in the replacement. Users
should take care if _s_t_r_i_n_g is double-quoted to avoid unwanted
interactions between the backslash and double-quoting, since
backslash has special meaning within double quotes. Pattern
substitution performs the check for unquoted && after expanding
_s_t_r_i_n_g; shell programmers should quote any occurrences of && they
want to be taken literally in the replacement and ensure any in-
stances of && they want to be replaced are unquoted.
If the nnooccaasseemmaattcchh shell option is enabled, the match is per-
formed without regard to the case of alphabetic characters. If
_p_a_r_a_m_e_t_e_r is @@ or **, the substitution operation is applied to
each positional parameter in turn, and the expansion is the re-
sultant list. If _p_a_r_a_m_e_t_e_r is an array variable subscripted
with @@ or **, the substitution operation is applied to each mem-
ber of the array in turn, and the expansion is the resultant
list.
${_p_a_r_a_m_e_t_e_r^^_p_a_t_t_e_r_n}
${_p_a_r_a_m_e_t_e_r^^^^_p_a_t_t_e_r_n}
@@ -6597,4 +6607,4 @@ BBUUGGSS
GNU Bash 5.2 2021 December 26 BASH(1)
GNU Bash 5.2 2022 January 17 BASH(1)