improve the error message

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/libreboot-utils/include/common.h

@@ -497,9 +497,9 @@ const char *getnvmprogname(void);
 /* libc hardening
  */
 
-int new_tmpfile(int *fd, char **path);
-int new_tmpdir(int *fd, char **path);
-int new_tmp_common(int *fd, char **path, int type);
+int new_tmpfile(int *fd, char **path, char *tmpdir);
+int new_tmpdir(int *fd, char **path, char *tmpdir);
+int new_tmp_common(int *fd, char **path, int type, char *tmpdir);
 int mkhtemp_try_create(int dirfd,
     struct stat *st_dir_initial,
     char *fname_copy,
@@ -517,7 +517,8 @@ int world_writeable_and_sticky(const char *s,
 int same_dir(const char *a, const char *b);
 int tmpdir_policy(const char *path,
     int *allow_noworld_unsticky);
-char *env_tmpdir(int always_sticky, char **tmpdir);
+char *env_tmpdir(int always_sticky, char **tmpdir,
+    char *override_tmpdir);
 int secure_file(int *fd,
     struct stat *st,
     struct stat *expected,
@@ -547,6 +548,7 @@ int mkdirat_on_eintr(int dirfd,
     const char *pathname, mode_t mode);
 int if_err(int condition, int errval);
 int if_err_sys(int condition);
+char *lbgetprogname(char *argv0);
 
 /* asserts */
 

util/libreboot-utils/lib/io.c

@@ -413,7 +413,15 @@ gbe_mv(void)
 	int tmp_gbe_bin_exists;
 
 	char *dest_tmp;
-	int dest_fd;
+	int dest_fd = -1;
+
+	char *dir = NULL;
+	char *base = NULL;
+	char *dest_name = NULL;
+
+	int dirfd = -1;
+
+	struct stat st_dir;
 
 	/* will be set 0 if it doesn't
 	 */
@@ -424,6 +432,8 @@ gbe_mv(void)
 
 	saved_errno = errno;
 
+	/* TODO: remove this path-based rename,
+		use fd */
 	rval = rename(f->tname, f->fname);
 
 	if (rval > -1) {
@@ -433,10 +443,12 @@ gbe_mv(void)
 
 		tmp_gbe_bin_exists = 0;
 
-		if (fsync_dir(f->fname) < 0) {
+/*
+		if (fsync(dest_fd) < 0) {
 			f->io_err_gbe_bin = 1;
 			rval = -1;
 		}
+*/
 
 		goto ret_gbe_mv;
 	}
@@ -444,57 +456,7 @@ gbe_mv(void)
 	if (errno != EXDEV)
 		goto ret_gbe_mv;
 
-	/*
-	 * OR, cross-filesystem rename:
-	 */
-
-	if ((rval = f->tmp_fd = open(f->tname,
-	    O_RDONLY | O_BINARY)) == -1)
-		goto ret_gbe_mv;
-
-	/* create replacement temp in target directory
-	 */
-	if (new_tmpfile(&dest_fd, &f->fname) < 1)
-		goto ret_gbe_mv;
-	if (dest_tmp == NULL)
-		goto ret_gbe_mv;
-
-	/* copy data
-	 */
-	rval = rw_file_exact(f->tmp_fd, f->bufcmp,
-	    f->gbe_file_size, 0, IO_PREAD,
-	    NO_LOOP_EAGAIN, LOOP_EINTR,
-	    MAX_ZERO_RW_RETRY, OFF_ERR);
-
-	if (rval < 0)
-		goto ret_gbe_mv;
-
-	rval = rw_file_exact(dest_fd, f->bufcmp,
-	    f->gbe_file_size, 0, IO_PWRITE,
-	    NO_LOOP_EAGAIN, LOOP_EINTR,
-	    MAX_ZERO_RW_RETRY, OFF_ERR);
-
-	if (rval < 0)
-		goto ret_gbe_mv;
-
-	if (fsync_on_eintr(dest_fd) == -1)
-		goto ret_gbe_mv;
-
-	if (close_on_eintr(dest_fd) == -1) {
-		dest_fd = -1;
-		goto ret_gbe_mv;
-	}
-	dest_fd = -1;
-
-	if (rename(dest_tmp, f->fname) == -1)
-		goto ret_gbe_mv;
-
-	if (fsync_dir(f->fname) < 0) {
-		f->io_err_gbe_bin = 1;
-		goto ret_gbe_mv;
-	}
-
-	free_if_null(&dest_tmp);
+	err(errno, "BUG: cross-filesystem move (this shouldn't happen)");
 
 ret_gbe_mv:
 

util/libreboot-utils/lib/mkhtemp.c

@@ -27,18 +27,21 @@
 
 #include "../include/common.h"
 
+/* note: tmpdir is an override of TMPDIR or /tmp or /var/tmp */
 int
-new_tmpfile(int *fd, char **path)
+new_tmpfile(int *fd, char **path, char *tmpdir)
 {
-	return new_tmp_common(fd, path, MKHTEMP_FILE);
+	return new_tmp_common(fd, path, MKHTEMP_FILE, tmpdir);
 }
 
+/* note: tmpdir is an override of TMPDIR or /tmp or /var/tmp */
 int
-new_tmpdir(int *fd, char **path)
+new_tmpdir(int *fd, char **path, char *tmpdir)
 {
-	return new_tmp_common(fd, path, MKHTEMP_DIR);
+	return new_tmp_common(fd, path, MKHTEMP_DIR, tmpdir);
 }
 
+/* note: tmpdir is an override of TMPDIR or /tmp or /var/tmp */
 /* WARNING:
  * on error, *path (at **path) may be
    NULL, or if the error pertains to
@@ -55,7 +58,8 @@ new_tmpdir(int *fd, char **path)
  * default to /tmp or /var/tmp
  */
 int
-new_tmp_common(int *fd, char **path, int type)
+new_tmp_common(int *fd, char **path, int type,
+    char *tmpdir)
 {
 #if defined(PATH_LEN) && \
     (PATH_LEN) >= 256
@@ -66,7 +70,6 @@ new_tmp_common(int *fd, char **path, int type)
 	struct stat st;
 
 	char suffix[] = "tmp.XXXXXXXXXX";
-	char *tmpdir = NULL;
 
 	size_t dirlen;
 	size_t destlen;
@@ -100,15 +103,25 @@ new_tmp_common(int *fd, char **path, int type)
 	* (on error, it will not be touched)
 	*/
 
-
 	*fd = -1;
 
+	if (tmpdir == NULL) { /* no user override */
+#if defined(PERMIT_NON_STICKY_ALWAYS) && \
+    ((PERMIT_NON_STICKY_ALWAYS) > 0)
+		tmpdir = env_tmpdir(PERMIT_NON_STICKY_ALWAYS, &fail_dir, NULL);
+#else
+		tmpdir = env_tmpdir(0, &fail_dir, NULL);
+#endif
+	} else {
+
 #if defined(PERMIT_NON_STICKY_ALWAYS) && \
     ((PERMIT_NON_STICKY_ALWAYS) > 0)
-	tmpdir = env_tmpdir(PERMIT_NON_STICKY_ALWAYS, &fail_dir);
+		tmpdir = env_tmpdir(PERMIT_NON_STICKY_ALWAYS, &fail_dir,
+		    tmpdir);
 #else
-	tmpdir = env_tmpdir(0, &fail_dir);
+		tmpdir = env_tmpdir(0, &fail_dir, tmpdir);
 #endif
+	}
 	if (tmpdir == NULL)
 		goto err;
 
@@ -189,7 +202,8 @@ err:
  */
 
 char *
-env_tmpdir(int bypass_all_sticky_checks, char **tmpdir)
+env_tmpdir(int bypass_all_sticky_checks, char **tmpdir,
+    char *override_tmpdir)
 {
 	char *t;
 	int allow_noworld_unsticky;
@@ -198,7 +212,11 @@ env_tmpdir(int bypass_all_sticky_checks, char **tmpdir)
 	char tmp[] = "/tmp";
 	char vartmp[] = "/var/tmp";
 
+	/* tmpdir is a user override, if set */
+	if (override_tmpdir == NULL)
 		t = getenv("TMPDIR");
+	else
+		t = override_tmpdir;
 
 	if (t != NULL && *t != '\0') {
 

util/libreboot-utils/lib/state.c

@@ -26,6 +26,9 @@ struct xstate *
 xstart(int argc, char *argv[])
 {
 	static int first_run = 1;
+	static char *dir = NULL;
+	static char *base = NULL;
+	char *realdir = NULL;
 
 	static struct xstate us = {
 	{
@@ -107,7 +110,15 @@ xstart(int argc, char *argv[])
 	us.f.tmp_fd = -1;
 	us.f.tname = NULL;
 
-	if (new_tmpfile(&us.f.tmp_fd, &us.f.tname) < 0)
+	if ((realdir = realpath(us.f.fname, NULL)) == NULL)
+		err_no_cleanup(errno, "xstart: can't get realpath of %s",
+		    us.f.fname);
+
+	if (fs_dirname_basename(realdir, &dir, &base, 0) < 0)
+		err_no_cleanup(errno, "xstart: don't know CWD of %s",
+		    us.f.fname);
+
+	if (new_tmpfile(&us.f.tmp_fd, &us.f.tname, dir) < 0)
 		err_no_cleanup(errno, "%s", us.f.tname);
 
 	if (us.f.tname == NULL)
@@ -164,32 +175,6 @@ err(int nvm_errval, const char *msg, ...)
 	exit(EXIT_FAILURE);
 }
 
-const char *
-getnvmprogname(void)
-{
-	struct xstate *x = xstatus();
-
-	const char *p;
-	static char fallback[] = "nvmutil";
-
-	char *rval = fallback;
-
-	if (x != NULL) {
-
-		if (x->argv0 != NULL && *x->argv0 != '\0')
-			rval = x->argv0;
-		else
-			return fallback;
-	}
-
-	p = strrchr(rval, '/');
-
-	if (p)
-		return p + 1;
-	else
-		return rval;
-}
-
 int
 exit_cleanup(void)
 {

util/libreboot-utils/lib/string.c

@@ -122,6 +122,8 @@ void
 err_no_cleanup(int nvm_errval, const char *msg, ...)
 {
 	va_list args;
+	int saved_errno = errno;
+	const char *p;
 
 #if defined(__OpenBSD__) && defined(OpenBSD)
 #if (OpenBSD) >= 509
@@ -129,11 +131,11 @@ err_no_cleanup(int nvm_errval, const char *msg, ...)
 		fprintf(stderr, "pledge failure during exit");
 #endif
 #endif
-
 	if (!errno)
-		errno = ECANCELED;
+		saved_errno = errno = ECANCELED;
 
-	fprintf(stderr, "nvmutil: ");
+	if ((p = getnvmprogname()) != NULL)
+		fprintf(stderr, "%s: ", p);
 
 	va_start(args, msg);
 	vfprintf(stderr, msg, args);
@@ -144,3 +146,61 @@ err_no_cleanup(int nvm_errval, const char *msg, ...)
 	exit(EXIT_FAILURE);
 }
 
+const char *
+getnvmprogname(void)
+{
+	static char *rval = NULL;
+	static char *p;	
+	static int setname = 0;
+
+	if (!setname) {
+		if ((rval = lbgetprogname(NULL)) == NULL)
+			return NULL;
+
+		p = strrchr(rval, '/');
+		if (p)
+			rval = p + 1;
+
+		setname = 1;
+	}
+
+	return rval;
+}
+
+/* singleton. if string not null,
+   sets the string. after set,
+   will not set anymore. either
+   way, returns the string
+ */
+char *
+lbgetprogname(char *argv0)
+{
+	static int setname = 0;
+	static char *progname = NULL;
+	size_t len;
+
+	if (!setname) {
+		if (if_err(argv0 == NULL || *argv0 == '\0', EFAULT) ||
+		    slen(argv0, 4096, &len) < 0 ||
+		    (progname = malloc(len + 1)) == NULL)
+			return NULL;
+
+		memcpy(progname, argv0, len + 1);
+		setname = 1;
+	}
+
+	return progname;
+}
+
+
+
+
+
+
+
+
+
+
+
+
+

util/libreboot-utils/mkhtemp.c

@@ -80,6 +80,9 @@ main(int argc, char *argv[])
 	size_t maxlen = 4096;
 #endif
 
+	if (lbgetprogname(argv[0]) == NULL)
+		err_no_cleanup(errno, "could not set progname");
+
 /* https://man.openbsd.org/pledge.2 */
 #if defined(__OpenBSD__) && defined(OpenBSD)
 #if (OpenBSD) >= 509
@@ -103,7 +106,7 @@ main(int argc, char *argv[])
 		}
 	}
 
-	if (new_tmp_common(&fd, &s, type) < 0)
+	if (new_tmp_common(&fd, &s, type, NULL) < 0)
 		err_no_cleanup(errno, "%s", s);
 
 #if defined(__OpenBSD__) && defined(OpenBSD)

util/libreboot-utils/nvmutil.c

@@ -35,6 +35,9 @@ main(int argc, char *argv[])
 
 	size_t c;
 
+	if (lbgetprogname(argv[0]) == NULL)
+		err_no_cleanup(errno, "could not set progname");
+
 /* https://man.openbsd.org/pledge.2
    https://man.openbsd.org/unveil.2     */
 #if defined(__OpenBSD__) && defined(OpenBSD)