Added lots of extra compiler checks and fixed a few minor issues.

Makefile

@@ -4,7 +4,19 @@ CC=cc
 G=
 O=-O2
 CFLAGS=-std=c99 -Werror -D_XOPEN_SOURCE=700 -D_GNU_SOURCE -D_POSIX_C_SOURCE=200809L
-CWARN=-Wall -Wpedantic -Wextra -Wsign-conversion -Wtype-limits -Wunused-result -Wnull-dereference
+CWARN=-Wall -Wpedantic -Wextra \
+	-Wsign-conversion -Wtype-limits -Wunused-result -Wnull-dereference \
+	-Waggregate-return -Walloc-zero -Walloca -Warith-conversion -Wcast-align -Wcast-align=strict \
+	-Wdangling-else -Wdate-time -Wdisabled-optimization -Wdouble-promotion -Wduplicated-branches \
+	-Wduplicated-cond -Wexpansion-to-defined -Wfloat-conversion -Wfloat-equal -Wformat-nonliteral \
+	-Wformat-security -Wformat-signedness -Wframe-address -Winline -Winvalid-pch -Wjump-misses-init \
+	-Wlogical-op -Wlong-long -Wmissing-format-attribute -Wmissing-include-dirs -Wmissing-noreturn \
+	-Wnull-dereference -Woverlength-strings -Wpacked -Wpacked-not-aligned -Wpointer-arith \
+	-Wredundant-decls -Wshadow -Wshadow=compatible-local -Wshadow=global -Wshadow=local \
+	-Wsign-conversion -Wstack-protector -Wsuggest-attribute=const -Wswitch-default -Wswitch-enum \
+	-Wsync-nand -Wtrampolines -Wundef -Wunused -Wunused-but-set-variable \
+	-Wunused-const-variable -Wunused-local-typedefs -Wunused-macros -Wvariadic-macros -Wvector-operation-performance \
+	-Wvla -Wwrite-strings
 #CFLAGS += -fsanitize=address -fno-omit-frame-pointer
 CFLAGS += '-DBB_NAME="$(NAME)"'
 

bb.c

@@ -45,12 +45,13 @@ static int compare_files(void *v, const void *v1, const void *v2);
 #else
 static int compare_files(const void *v1, const void *v2, void *v);
 #endif
+__attribute__((format(printf,2,3)))
 void flash_warn(bb_t *bb, const char *fmt, ...);
 static void handle_next_key_binding(bb_t *bb);
 static void init_term(void);
 static int is_simple_bbcmd(const char *s);
 static entry_t* load_entry(bb_t *bb, const char *path);
-static inline int matches_cmd(const char *str, const char *cmd);
+static int matches_cmd(const char *str, const char *cmd);
 static void* memcheck(void *p);
 static char* normalize_path(const char *root, const char *path, char *pbuf);
 static int populate_files(bb_t *bb, const char *path);
@@ -240,6 +241,7 @@ static int compare_files(const void *v1, const void *v2, void *v)
             case COL_CTIME: COMPARE_TIME(ctime(e1->info), ctime(e2->info)); break;
             case COL_ATIME: COMPARE_TIME(atime(e1->info), atime(e2->info)); break;
             case COL_RANDOM: COMPARE(e2->shufflepos, e1->shufflepos); break;
+            default: break;
         }
     }
     return 0;
@@ -418,7 +420,7 @@ static entry_t* load_entry(bb_t *bb, const char *path)
 // Return whether a string matches a command
 // e.g. matches_cmd("sel:x", "select:") == 1, matches_cmd("q", "quit") == 1
 //
-static inline int matches_cmd(const char *str, const char *cmd)
+static int matches_cmd(const char *str, const char *cmd)
 {
     if ((strchr(cmd, ':') == NULL) != (strchr(str, ':') == NULL))
         return 0;
@@ -642,7 +644,7 @@ static void run_bbcmd(bb_t *bb, const char *cmd)
         char *description;
         if (script[0] == '#') {
             description = trim(strsep(&script, "\n") + 1);
-            if (!script) script = "";
+            if (!script) script = (char*)"";
             else script = trim(script);
         } else description = script;
         for (char *key; (key = strsep(&keys, ",")); ) {
@@ -834,7 +836,7 @@ static int run_script(bb_t *bb, const char *cmd)
         (void)setpgid(0, pgrp);
         if (tcsetpgrp(STDIN_FILENO, pgrp))
             clean_err("Couldn't set pgrp");
-        char **args = xcalloc(4 + (size_t)bb->nselected + 1, sizeof(char*));
+        const char **args = xcalloc(4 + (size_t)bb->nselected + 1, sizeof(char*));
         int i = 0;
         args[i++] = "sh";
         args[i++] = "-c";
@@ -850,7 +852,7 @@ static int run_script(bb_t *bb, const char *cmd)
 
         dup2(fileno(tty_out), STDOUT_FILENO);
         dup2(fileno(tty_in), STDIN_FILENO);
-        execvp(args[0], args);
+        execvp(args[0], (char**)args);
         clean_err("Failed to execute command: '%s'", cmd);
         return -1;
     }
@@ -970,8 +972,8 @@ static void set_selected(bb_t *bb, entry_t *e, int selected)
 //
 static void set_sort(bb_t *bb, const char *sort)
 {
-    char sortbuf[strlen(sort)+1];
+    char sortbuf[MAX_SORT+1];
-    strcpy(sortbuf, sort);
+    strncpy(sortbuf, sort, MAX_SORT);
     for (char *s = sortbuf; s[0] && s[1]; s += 2) {
         char *found;
         if ((found = strchr(bb->sort, s[1]))) {
@@ -1074,7 +1076,7 @@ static int wait_for_process(proc_t **proc)
 
 int main(int argc, char *argv[])
 {
-    char *initial_path;
+    const char *initial_path;
     if (argc >= 3 && streq(argv[argc-2], "--")) {
         initial_path = argv[argc-1];
         argc -= 2;

draw.c

@@ -46,7 +46,7 @@ static char* stpcpy_escaped(char *buf, const char *str, const char *color)
         if (*c > 0 && *c <= '\x1b' && escapes[(int)*c] != ' ') { // "\n", etc.
             buf += sprintf(buf, "\033[31m\\%c%s", escapes[(int)*c], color);
         } else if (*c >= 0 && !(' ' <= *c && *c <= '~')) { // "\x02", etc.
-            buf += sprintf(buf, "\033[31m\\x%02X%s", *c, color);
+            buf += sprintf(buf, "\033[31m\\x%02X%s", (unsigned int)*c, color);
         } else {
             *(buf++) = *c;
         }
@@ -69,7 +69,7 @@ static int fputs_escaped(FILE *f, const char *str, const char *color)
             fprintf(f, "\033[31m\\%c%s", escapes[(int)*c], color);
             ++escaped;
         } else if (*c >= 0 && !(' ' <= *c && *c <= '~')) { // "\x02", etc.
-            fprintf(f, "\033[31m\\x%02X%s", *c, color);
+            fprintf(f, "\033[31m\\x%02X%s", (unsigned int)*c, color);
             ++escaped;
         } else {
             fputc(*c, f);

terminal.c

@@ -58,13 +58,13 @@ static keyname_t key_names[] = {
     {':', "Colon"}, {',', "Comma"},
 };
 
-static inline int nextchar(int fd)
+static int nextchar(int fd)
 {
     char c;
     return read(fd, &c, 1) == 1 ? c : -1;
 }
 
-static inline int nextnum(int fd, int c, int *n)
+static int nextnum(int fd, int c, int *n)
 {
     for (*n = 0; '0' <= c && c <= '9'; c = nextchar(fd))
         *n = 10*(*n) + (c - '0');
@@ -143,6 +143,7 @@ int bgetkey(FILE *in, int *mouse_x, int *mouse_y)
                 case 21: return modifiers | KEY_F10;
                 case 23: return modifiers | KEY_F11;
                 case 24: return modifiers | KEY_F12;
+                default: break;
             }
             return -1;
         case '<': { // Mouse clicks
@@ -185,6 +186,7 @@ int bgetkey(FILE *in, int *mouse_x, int *mouse_y)
                             case MOUSE_LEFT_RELEASE: key = MOUSE_LEFT_DOUBLE; break;
                             case MOUSE_RIGHT_RELEASE: key = MOUSE_RIGHT_DOUBLE; break;
                             case MOUSE_MIDDLE_RELEASE: key = MOUSE_MIDDLE_DOUBLE; break;
+                            default: break;
                         }
                     }
                 }
@@ -238,7 +240,7 @@ char *bkeyname(int key, char *buf)
     if (' ' < key && key <= '~')
         return buf + sprintf(buf, "%c", key);
     else
-        return buf + sprintf(buf, "\\x%02X", key);
+        return buf + sprintf(buf, "\\x%02X", (unsigned int)key);
 }
 
 //