diff options
Diffstat (limited to 'lib/util/substitute.c')
| -rw-r--r-- | lib/util/substitute.c | 55 |
1 files changed, 42 insertions, 13 deletions
diff --git a/lib/util/substitute.c b/lib/util/substitute.c index 32945a72134..500d12777f9 100644 --- a/lib/util/substitute.c +++ b/lib/util/substitute.c @@ -29,18 +29,20 @@ **/ /** - Substitute a string for a pattern in another string. Make sure there is + Substitute a string for a pattern in another string. Make sure there is enough room! - This routine looks for pattern in s and replaces it with - insert. It may do multiple replacements. + This routine looks for pattern in s and replaces it with + insert. It may do multiple replacements or just one. Any of " ; ' $ or ` in the insert string are replaced with _ if len==0 then the string cannot be extended. This is different from the old use of len==0 which was for no length checks to be done. **/ -_PUBLIC_ void string_sub(char *s, const char *pattern, const char *insert, size_t len) +static void string_sub2(char *s,const char *pattern, const char *insert, size_t len, + bool remove_unsafe_characters, bool replace_once, + bool allow_trailing_dollar) { char *p; ssize_t ls, lp, li, i; @@ -55,9 +57,10 @@ _PUBLIC_ void string_sub(char *s, const char *pattern, const char *insert, size_ if (len == 0) len = ls + 1; /* len is number of *bytes* */ - while (lp <= ls && (p = strstr(s, pattern))) { + while (lp <= ls && (p = strstr_m(s,pattern))) { if (ls + (li-lp) >= len) { - DEBUG(0,("ERROR: string overflow by %d in string_sub(%.50s, %d)\n", + DEBUG(0,("ERROR: string overflow by " + "%d in string_sub(%.50s, %d)\n", (int)(ls + (li-lp) - len), pattern, (int)len)); break; @@ -67,25 +70,50 @@ _PUBLIC_ void string_sub(char *s, const char *pattern, const char *insert, size_ } for (i=0;i<li;i++) { switch (insert[i]) { + case '$': + /* allow a trailing $ + * (as in machine accounts) */ + if (allow_trailing_dollar && (i == li - 1 )) { + p[i] = insert[i]; + break; + } case '`': case '"': case '\'': case ';': - case '$': case '%': case '\r': case '\n': - p[i] = '_'; - break; + if ( remove_unsafe_characters ) { + p[i] = '_'; + /* yes this break should be here + * since we want to fall throw if + * not replacing unsafe chars */ + break; + } default: p[i] = insert[i]; } } s = p + li; ls += (li-lp); + + if (replace_once) + break; } } +void string_sub_once(char *s, const char *pattern, + const char *insert, size_t len) +{ + string_sub2( s, pattern, insert, len, true, true, false ); +} + +void string_sub(char *s,const char *pattern, const char *insert, size_t len) +{ + string_sub2( s, pattern, insert, len, true, false, false ); +} + /** * Talloc'ed version of string_sub */ @@ -146,13 +174,14 @@ _PUBLIC_ void all_string_sub(char *s,const char *pattern,const char *insert, siz if (!*pattern) return; - + if (len == 0) len = ls + 1; /* len is number of *bytes* */ - - while (lp <= ls && (p = strstr(s,pattern))) { + + while (lp <= ls && (p = strstr_m(s,pattern))) { if (ls + (li-lp) >= len) { - DEBUG(0,("ERROR: string overflow by %d in all_string_sub(%.50s, %d)\n", + DEBUG(0,("ERROR: string overflow by " + "%d in all_string_sub(%.50s, %d)\n", (int)(ls + (li-lp) - len), pattern, (int)len)); break; |