diff options
-rw-r--r-- | lib/libpam/openpam_readword.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/lib/libpam/openpam_readword.c b/lib/libpam/openpam_readword.c index 5a4330c6c75d..b52e7dfa41c0 100644 --- a/lib/libpam/openpam_readword.c +++ b/lib/libpam/openpam_readword.c @@ -55,18 +55,35 @@ openpam_readword(FILE *f, int *lineno, size_t *lenp) { char *word; size_t size, len; - int ch, comment, escape, quote; + int ch, escape, quote; int serrno; errno = 0; /* skip initial whitespace */ - comment = 0; - while ((ch = getc(f)) != EOF && ch != '\n') { - if (ch == '#') - comment = 1; - if (!is_lws(ch) && !comment) + escape = quote = 0; + while ((ch = getc(f)) != EOF) { + if (ch == '\n') { + /* either EOL or line continuation */ + if (!escape) + break; + if (lineno != NULL) + ++*lineno; + escape = 0; + } else if (escape) { + /* escaped something else */ + break; + } else if (ch == '#') { + /* comment: until EOL, no continuation */ + while ((ch = getc(f)) != EOF) + if (ch == '\n') + break; break; + } else if (ch == '\\') { + escape = 1; + } else if (!is_ws(ch)) { + break; + } } if (ch == EOF) return (NULL); @@ -76,7 +93,6 @@ openpam_readword(FILE *f, int *lineno, size_t *lenp) word = NULL; size = len = 0; - escape = quote = 0; while ((ch = fgetc(f)) != EOF && (!is_ws(ch) || quote || escape)) { if (ch == '\\' && !escape && quote != '\'') { /* escape next character */ @@ -90,7 +106,7 @@ openpam_readword(FILE *f, int *lineno, size_t *lenp) } else if (ch == quote && !escape) { /* end quote */ quote = 0; - } else if (ch == '\n' && escape && quote != '\'') { + } else if (ch == '\n' && escape) { /* line continuation */ escape = 0; } else { |