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libbb: revent previous version of "concurrent history updating"

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and replace it with one which does not "snoop" history written
by others. (1) it is what bug 185 needs, and (2) it is less bloaty:

function                                             old     new   delta
load_history                                           -     252    +252
read_line_input                                     3155    3287    +132
next_token                                           914     918      +4
qrealloc                                              36      33      -3
getoptscmd                                           713     708      -5
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/2 up/down: 388/-8)            Total: 380 bytes
This commit is contained in:
Denis Vlasenko
2009-03-23 06:33:37 +00:00
parent ddbee974b4
commit c0ea82a457
2 changed files with 56 additions and 60 deletions
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2
include/libbb.h
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@ -1199,7 +1199,6 @@ typedef struct line_input_t {
int cur_history;
#if ENABLE_FEATURE_EDITING_SAVEHISTORY
unsigned cnt_history_in_file;
off_t last_history_end;
const char *hist_file;
#endif
char *history[MAX_HISTORY + 1];
@ -1215,6 +1214,7 @@ enum {
FOR_SHELL = DO_HISTORY | SAVE_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
};
line_input_t *new_line_input_t(int flags) FAST_FUNC;
/* so far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
/* Returns:
* -1 on read errors or EOF, or on bare Ctrl-D,
* 0 on ctrl-C (the line entered is still returned in 'command'),