projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| dc06984c MT |
1 | /* |
| 2 | * Editline and history functions (and glue). | |
| 3 | */ | |
| 4 | #include <stdio.h> | |
| 5 | #include "parser.h" | |
| 6 | #include "options.h" | |
| 7 | #include "error.h" | |
| 8 | ||
| 9 | #include "histedit.h" | |
| 10 | ||
| 11 | History *hist; /* history cookie */ | |
| 12 | EditLine *el; /* editline cookie */ | |
| 13 | static FILE *el_in, *el_out; | |
| 14 | ||
| 15 | extern int is_interactive; | |
| 16 | ||
| 17 | /* | |
| 18 | * Set history and editing status. Called whenever the status may | |
| 19 | * have changed (figures out what to do). | |
| 20 | */ | |
| 21 | histedit() { | |
| 22 | ||
| 23 | if (is_interactive) { | |
| 24 | if (!hist) { | |
| 25 | /* | |
| 26 | * turn history on | |
| 27 | */ | |
| 28 | INTOFF; | |
| 29 | hist = history_init(); | |
| 30 | INTON; | |
| 31 | ||
| 32 | if (hist != NULL) | |
| 33 | sethistsize(); | |
| 34 | else | |
| 35 | out2str("sh: can't initialize history\n"); | |
| 36 | } | |
| 37 | if (Eflag && !el && isatty(0)) { /* && isatty(2) ??? */ | |
| 38 | /* | |
| 39 | * turn editing on | |
| 40 | */ | |
| 41 | INTOFF; | |
| 42 | if (el_in == NULL) | |
| 43 | el_in = fdopen(0, "r"); | |
| 44 | if (el_out == NULL) | |
| 45 | el_out = fdopen(2, "w"); | |
| 46 | if (el_in == NULL || el_out == NULL) | |
| 47 | goto bad; | |
| 48 | el = el_init(arg0, el_in, el_out); | |
| 49 | if (el != NULL) { | |
| 50 | if (hist) | |
| 51 | el_set(el, EL_HIST, history_set, hist); | |
| 52 | el_set(el, EL_PROMPT, getprompt); | |
| 53 | } else { | |
| 54 | bad: | |
| 55 | out2str("sh: can't initialize editing\n"); | |
| 56 | } | |
| 57 | INTON; | |
| 58 | if (el) /* XXX - -o vi etc... */ | |
| 59 | el_set(el, EL_EDITOR, "vi"); | |
| 60 | } else if (!Eflag && el) { | |
| 61 | INTOFF; | |
| 62 | el_end(el); | |
| 63 | el = NULL; | |
| 64 | INTON; | |
| 65 | } | |
| 66 | } else { | |
| 67 | INTOFF; | |
| 68 | if (el) { /* no editing if not interactive */ | |
| 69 | el_end(el); | |
| 70 | el = NULL; | |
| 71 | } | |
| 72 | if (hist) { | |
| 73 | history_end(hist); | |
| 74 | hist = NULL; | |
| 75 | } | |
| 76 | INTON; | |
| 77 | } | |
| 78 | } | |
| 79 | ||
| 80 | sethistsize() { | |
| 81 | char *cp; | |
| 82 | int histsize; | |
| 83 | ||
| 84 | if (hist != NULL) { | |
| 85 | cp = lookupvar("HISTSIZE"); | |
| 86 | if (cp == NULL || *cp == '\0' || | |
| 87 | (histsize = atoi(cp)) < 0) | |
| 88 | histsize = 100; | |
| 89 | history_set(hist, H_EVENT, histsize); | |
| 90 | } | |
| 91 | } |