From d3a435e53c94ec25b4ae5fa2614f49ef8884e08a Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Tue, 5 Jan 2016 22:26:58 -0600
Subject: Add error_msg_raw() and friends, replace error_msg("%s", s) uses,
 enable format checking, and fix up format checking complaints.

Added out(type, value) function to stat to avoid a zillion printf typecasts.
---
 lib/lib.c         | 42 +++++++++++++++++++++++++++++++++---------
 lib/lib.h         |  6 +++++-
 lib/portability.h |  4 ----
 lib/xwrap.c       |  4 ++--
 4 files changed, 40 insertions(+), 16 deletions(-)

(limited to 'lib')

diff --git a/lib/lib.c b/lib/lib.c
index c89aeb60..8d12b983 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -49,6 +49,18 @@ void error_exit(char *msg, ...)
   xexit();
 }
 
+// Die with an error message and strerror(errno)
+void perror_exit(char *msg, ...)
+{
+  va_list va;
+
+  va_start(va, msg);
+  verror_msg(msg, errno, va);
+  va_end(va);
+
+  xexit();
+}
+
 // Exit with an error message after showing help text.
 void help_exit(char *msg, ...)
 {
@@ -65,16 +77,28 @@ void help_exit(char *msg, ...)
   xexit();
 }
 
-// Die with an error message and strerror(errno)
-void perror_exit(char *msg, ...)
+// If you want to explicitly disable the printf() behavior (because you're
+// printing user-supplied data, or because android's static checker produces
+// false positives for 'char *s = x ? "blah1" : "blah2"; printf(s);' and it's
+// -Werror there for policy reasons).
+void error_msg_raw(char *msg)
 {
-  va_list va;
+  error_msg("%s", msg);
+}
 
-  va_start(va, msg);
-  verror_msg(msg, errno, va);
-  va_end(va);
+void perror_msg_raw(char *msg)
+{
+  perror_msg("%s", msg);
+}
 
-  xexit();
+void error_exit_raw(char *msg)
+{
+  error_exit("%s", msg);
+}
+
+void perror_exit_raw(char *msg)
+{
+  error_exit("%s", msg);
 }
 
 // Keep reading until full or EOF
@@ -260,7 +284,7 @@ long xstrtol(char *str, char **end, int base)
 {
   long l = estrtol(str, end, base);
 
-  if (errno) perror_exit("%s", str);
+  if (errno) perror_exit_raw(str);
 
   return l;
 }
@@ -525,7 +549,7 @@ void loopfiles_rw(char **argv, int flags, int permissions, int failok,
 
     if (!strcmp(*argv, "-")) fd=0;
     else if (0>(fd = open(*argv, flags, permissions)) && !failok)
-      perror_msg("%s", *argv);
+      perror_msg_raw(*argv);
     else {
       function(fd, *argv);
       if (flags & O_CLOEXEC) close(fd);
diff --git a/lib/lib.h b/lib/lib.h
index 235b208f..d56cdbe3 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -152,8 +152,12 @@ void verror_msg(char *msg, int err, va_list va);
 void error_msg(char *msg, ...) printf_format;
 void perror_msg(char *msg, ...) printf_format;
 void error_exit(char *msg, ...) printf_format noreturn;
-void help_exit(char *msg, ...) printf_format noreturn;
 void perror_exit(char *msg, ...) printf_format noreturn;
+void help_exit(char *msg, ...) printf_format noreturn;
+void error_msg_raw(char *msg);
+void perror_msg_raw(char *msg);
+void error_exit_raw(char *msg);
+void perror_exit_raw(char *msg);
 ssize_t readall(int fd, void *buf, size_t len);
 ssize_t writeall(int fd, void *buf, size_t len);
 off_t lskip(int fd, off_t offset);
diff --git a/lib/portability.h b/lib/portability.h
index f2f98069..eadd9961 100644
--- a/lib/portability.h
+++ b/lib/portability.h
@@ -11,12 +11,8 @@
 
 #ifdef __GNUC__
 #define noreturn	__attribute__((noreturn))
-#if CFG_TOYBOX_DEBUG
 #define printf_format	__attribute__((format(printf, 1, 2)))
 #else
-#define printf_format
-#endif
-#else
 #define noreturn
 #define printf_format
 #endif
diff --git a/lib/xwrap.c b/lib/xwrap.c
index 6d0c5113..09f9197d 100644
--- a/lib/xwrap.c
+++ b/lib/xwrap.c
@@ -214,7 +214,7 @@ pid_t xpopen_both(char **argv, int *pipes)
       // setting high bit of argv[0][0] to let new process know
       **toys.argv |= 0x80;
       execv(s, toys.argv);
-      perror_msg(s);
+      perror_msg_raw(s);
 
       _exit(127);
     }
@@ -291,7 +291,7 @@ void xunlink(char *path)
 int xcreate(char *path, int flags, int mode)
 {
   int fd = open(path, flags^O_CLOEXEC, mode);
-  if (fd == -1) perror_exit("%s", path);
+  if (fd == -1) perror_exit_raw(path);
   return fd;
 }
 
-- 
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