diff options
Diffstat (limited to 'Src')
| -rw-r--r-- | Src/input.c | 33 | ||||
| -rw-r--r-- | Src/lex.c | 4 | ||||
| -rw-r--r-- | Src/zsh.h | 1 |
3 files changed, 36 insertions, 2 deletions
diff --git a/Src/input.c b/Src/input.c index 9520fdd6d..f919e5757 100644 --- a/Src/input.c +++ b/Src/input.c @@ -330,8 +330,37 @@ inputline(void) } } isfirstch = 1; - /* Put this into the input channel. */ - inputsetline(ingetcline, INP_FREE); + if ((inbufflags & INP_APPEND) && inbuf) { + /* + * We need new input but need to be able to back up + * over the old input, so append this line. + * Pushing the line onto the stack doesn't have the right + * effect. + * + * This is quite a simple and inefficient fix, but currently + * we only need it when backing up over a multi-line $((... + * that turned out to be a command substitution rather than + * a math substitution, which is a very special case. + * So it's not worth rewriting. + */ + char *oinbuf = inbuf; + int newlen = strlen(ingetcline); + int oldlen = (int)(inbufptr - inbuf) + inbufleft; + if (inbufflags & INP_FREE) { + inbuf = realloc(inbuf, oldlen + newlen + 1); + inbufptr += inbuf - oinbuf; + strcpy(inbuf + oldlen, ingetcline); + } else { + /* Paranoia: don't think this is used */ + DPUTS(1, "Appending to unallocated input line."); + } + inbufleft += newlen; + inbufct += newlen; + inbufflags |= INP_FREE; + } else { + /* Put this into the input channel. */ + inputsetline(ingetcline, INP_FREE); + } return 0; } @@ -483,9 +483,13 @@ cmd_or_math(int cs_type) { int oldlen = lexbuf.len; int c; + int oinflags = inbufflags; cmdpush(cs_type); + inbufflags |= INP_APPEND; c = dquote_parse(')', 0); + if (!(oinflags & INP_APPEND)) + inbufflags &= ~INP_APPEND; cmdpop(); *lexbuf.ptr = '\0'; if (!c) { @@ -410,6 +410,7 @@ enum { #define INP_CONT (1<<3) /* continue onto previously stacked input */ #define INP_ALCONT (1<<4) /* stack is continued from alias expn. */ #define INP_LINENO (1<<5) /* update line number */ +#define INP_APPEND (1<<6) /* Append new lines to allow backup */ /* Flags for metafy */ #define META_REALLOC 0 |