diff options
Diffstat (limited to 'shell/shell_common.c')
| -rw-r--r-- | shell/shell_common.c | 37 |
1 files changed, 36 insertions, 1 deletions
diff --git a/shell/shell_common.c b/shell/shell_common.c index 9e58ee4..0a07296 100644 --- a/shell/shell_common.c +++ b/shell/shell_common.c @@ -274,9 +274,44 @@ shell_builtin_read(void FAST_FUNC (*setvar)(const char *name, const char *val), if (argv[0]) { /* Remove trailing space $IFS chars */ - while (--bufpos >= 0 && isspace(buffer[bufpos]) && strchr(ifs, buffer[bufpos]) != NULL) + while (--bufpos >= 0 + && isspace(buffer[bufpos]) + && strchr(ifs, buffer[bufpos]) != NULL + ) { continue; + } buffer[bufpos + 1] = '\0'; + + /* Last variable takes the entire remainder with delimiters + * (sans trailing whitespace $IFS), + * but ***only "if there are fewer vars than fields"(c)***! + * The "X:Y:" case below: there are two fields, + * and therefore last delimiter (:) is eaten: + * IFS=": " + * echo "X:Y:Z:" | (read x y; echo "|$x|$y|") # |X|Y:Z:| + * echo "X:Y:Z" | (read x y; echo "|$x|$y|") # |X|Y:Z| + * echo "X:Y:" | (read x y; echo "|$x|$y|") # |X|Y|, not |X|Y:| + * echo "X:Y : " | (read x y; echo "|$x|$y|") # |X|Y| + */ + if (bufpos >= 0 + && strchr(ifs, buffer[bufpos]) != NULL + ) { + /* There _is_ a non-whitespace IFS char */ + /* Skip whitespace IFS char before it */ + while (--bufpos >= 0 + && isspace(buffer[bufpos]) + && strchr(ifs, buffer[bufpos]) != NULL + ) { + continue; + } + /* Are there $IFS chars? */ + if (strcspn(buffer, ifs) >= ++bufpos) { + /* No: last var takes one field, not more */ + /* So, drop trailing IFS delims */ + buffer[bufpos] = '\0'; + } + } + /* Use the remainder as a value for the next variable */ setvar(*argv, buffer); /* Set the rest to "" */ |