From 7ce4fb948c6d196a376a37840cb80ae95b5897ec Mon Sep 17 00:00:00 2001 From: Jeff King Date: Thu, 24 Sep 2015 17:08:21 -0400 Subject: [PATCH] color: add color_set helper for copying raw colors To set up default colors, we sometimes strcpy() from the default string literals into our color buffers. This isn't a bug (assuming the destination is COLOR_MAXLEN bytes), but makes it harder to audit the code for problematic strcpy calls. Let's introduce a color_set which copies under the assumption that there are COLOR_MAXLEN bytes in the destination (of course you can call it on a smaller buffer, so this isn't providing a huge amount of safety, but it's more convenient than calling xsnprintf yourself). Signed-off-by: Jeff King Signed-off-by: Junio C Hamano --- color.c | 5 +++++ color.h | 7 +++++++ grep.c | 32 ++++++++++++++++---------------- 3 files changed, 28 insertions(+), 16 deletions(-) diff --git a/color.c b/color.c index 22782f8ba3..8f85153d0d 100644 --- a/color.c +++ b/color.c @@ -145,6 +145,11 @@ int color_parse(const char *value, char *dst) return color_parse_mem(value, strlen(value), dst); } +void color_set(char *dst, const char *color_bytes) +{ + xsnprintf(dst, COLOR_MAXLEN, "%s", color_bytes); +} + /* * Write the ANSI color codes for "c" to "out"; the string should * already have the ANSI escape code in it. "out" should have enough diff --git a/color.h b/color.h index 7fe77fb55e..e155d13f78 100644 --- a/color.h +++ b/color.h @@ -75,6 +75,13 @@ extern int color_stdout_is_tty; int git_color_config(const char *var, const char *value, void *cb); int git_color_default_config(const char *var, const char *value, void *cb); +/* + * Set the color buffer (which must be COLOR_MAXLEN bytes) + * to the raw color bytes; this is useful for initializing + * default color variables. + */ +void color_set(char *dst, const char *color_bytes); + int git_config_colorbool(const char *var, const char *value); int want_color(int var); int color_parse(const char *value, char *dst); diff --git a/grep.c b/grep.c index 6c68d5bd2e..7b2b96a437 100644 --- a/grep.c +++ b/grep.c @@ -31,14 +31,14 @@ void init_grep_defaults(void) opt->max_depth = -1; opt->pattern_type_option = GREP_PATTERN_TYPE_UNSPECIFIED; opt->extended_regexp_option = 0; - strcpy(opt->color_context, ""); - strcpy(opt->color_filename, ""); - strcpy(opt->color_function, ""); - strcpy(opt->color_lineno, ""); - strcpy(opt->color_match_context, GIT_COLOR_BOLD_RED); - strcpy(opt->color_match_selected, GIT_COLOR_BOLD_RED); - strcpy(opt->color_selected, ""); - strcpy(opt->color_sep, GIT_COLOR_CYAN); + color_set(opt->color_context, ""); + color_set(opt->color_filename, ""); + color_set(opt->color_function, ""); + color_set(opt->color_lineno, ""); + color_set(opt->color_match_context, GIT_COLOR_BOLD_RED); + color_set(opt->color_match_selected, GIT_COLOR_BOLD_RED); + color_set(opt->color_selected, ""); + color_set(opt->color_sep, GIT_COLOR_CYAN); opt->color = -1; } @@ -151,14 +151,14 @@ void grep_init(struct grep_opt *opt, const char *prefix) opt->regflags = def->regflags; opt->relative = def->relative; - strcpy(opt->color_context, def->color_context); - strcpy(opt->color_filename, def->color_filename); - strcpy(opt->color_function, def->color_function); - strcpy(opt->color_lineno, def->color_lineno); - strcpy(opt->color_match_context, def->color_match_context); - strcpy(opt->color_match_selected, def->color_match_selected); - strcpy(opt->color_selected, def->color_selected); - strcpy(opt->color_sep, def->color_sep); + color_set(opt->color_context, def->color_context); + color_set(opt->color_filename, def->color_filename); + color_set(opt->color_function, def->color_function); + color_set(opt->color_lineno, def->color_lineno); + color_set(opt->color_match_context, def->color_match_context); + color_set(opt->color_match_selected, def->color_match_selected); + color_set(opt->color_selected, def->color_selected); + color_set(opt->color_sep, def->color_sep); } void grep_commit_pattern_type(enum grep_pattern_type pattern_type, struct grep_opt *opt)