diff options
Diffstat (limited to 'src/basic')
| -rw-r--r-- | src/basic/util.c | 27 | ||||
| -rw-r--r-- | src/basic/util.h | 5 |
2 files changed, 26 insertions, 6 deletions
diff --git a/src/basic/util.c b/src/basic/util.c index e0d1220153..46a48c4d60 100644 --- a/src/basic/util.c +++ b/src/basic/util.c @@ -5246,21 +5246,39 @@ int unquote_first_word(const char **p, char **ret, UnquoteFlags flags) { case SINGLE_QUOTE_ESCAPE: case DOUBLE_QUOTE_ESCAPE: case VALUE_ESCAPE: + if (!GREEDY_REALLOC(s, allocated, sz+7)) + return -ENOMEM; + if (c == 0) { + if ((flags & UNQUOTE_CUNESCAPE_RELAX) && + (state == VALUE_ESCAPE || flags & UNQUOTE_RELAX)) { + /* If we find an unquoted trailing backslash and we're in + * UNQUOTE_CUNESCAPE_RELAX mode, keep it verbatim in the + * output. + * + * Unbalanced quotes will only be allowed in UNQUOTE_RELAX + * mode, UNQUOTE_CUNESCAP_RELAX mode does not allow them. + */ + s[sz++] = '\\'; + goto finish; + } if (flags & UNQUOTE_RELAX) goto finish; return -EINVAL; } - if (!GREEDY_REALLOC(s, allocated, sz+7)) - return -ENOMEM; - if (flags & UNQUOTE_CUNESCAPE) { uint32_t u; r = cunescape_one(*p, (size_t) -1, &c, &u); - if (r < 0) + if (r < 0) { + if (flags & UNQUOTE_CUNESCAPE_RELAX) { + s[sz++] = '\\'; + s[sz++] = c; + goto end_escape; + } return -EINVAL; + } (*p) += r - 1; @@ -5271,6 +5289,7 @@ int unquote_first_word(const char **p, char **ret, UnquoteFlags flags) { } else s[sz++] = c; +end_escape: state = (state == SINGLE_QUOTE_ESCAPE) ? SINGLE_QUOTE : (state == DOUBLE_QUOTE_ESCAPE) ? DOUBLE_QUOTE : VALUE; diff --git a/src/basic/util.h b/src/basic/util.h index 7aca46d777..748f22f1a2 100644 --- a/src/basic/util.h +++ b/src/basic/util.h @@ -839,8 +839,9 @@ int is_dir(const char *path, bool follow); int is_device_node(const char *path); typedef enum UnquoteFlags { - UNQUOTE_RELAX = 1, - UNQUOTE_CUNESCAPE = 2, + UNQUOTE_RELAX = 1, + UNQUOTE_CUNESCAPE = 2, + UNQUOTE_CUNESCAPE_RELAX = 4, } UnquoteFlags; int unquote_first_word(const char **p, char **ret, UnquoteFlags flags); |