hush: fix read builtin to not read ahead past eol and to not use

insane amounts of stack. Testsuite updated.

1 files changed, 4 insertions, 0 deletions

diff --git a/include/libbb.h b/include/libbb.h
index ce62f4529..5aa95ea88 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -400,7 +400,11 @@ extern ssize_t safe_read(int fd, void *buf, size_t count);
 extern ssize_t full_read(int fd, void *buf, size_t count);
 extern void xread(int fd, void *buf, size_t count);
 extern unsigned char xread_char(int fd);
+// Read one line a-la fgets. Uses one read(), works only on seekable streams
 extern char *reads(int fd, char *buf, size_t count);
+// Read one line a-la fgets. Reads byte-by-byte.
+// Useful when it is important to not read ahead.
+extern char *xmalloc_reads(int fd, char *pfx);
 extern ssize_t read_close(int fd, void *buf, size_t count);
 extern ssize_t open_read_close(const char *filename, void *buf, size_t count);
 extern void *xmalloc_open_read_close(const char *filename, size_t *sizep);