yamt commented on code in PR #8868:
URL: https://github.com/apache/nuttx/pull/8868#discussion_r1161477288
##########
arch/sim/Kconfig:
##########
@@ -159,6 +159,15 @@ config SIM_HOSTFS
---help---
Access host filesystem through HostFS.
+if SIM_HOSTFS
+config SIM_HOSTFS_PATH_CONVERSION
+bool "Simulated HostFS path conversion"
+default n
+---help---
+ If this option is enabled, the nuttx image folder will be used as the
root path
+ when hostfs accesses the file, otherwise $CWD will be used as the root
path to search
Review Comment:
my understanding is this option doesn't affect `mount -t hostfs -o
fs=/absolutepath /mnt`. right?
this description makes me think otherwise.
especially the term `the root path` gives me an impression it changes the
behavior of absolute paths.
##########
arch/sim/src/sim/posix/sim_hostfs.c:
##########
@@ -36,10 +36,66 @@
#include "hostfs.h"
+#ifdef CONFIG_HOST_MACOS
+#include <sys/syslimits.h>
+#include <mach-o/dyld.h>
+#endif
+
/****************************************************************************
* Private Functions
****************************************************************************/
+/****************************************************************************
+ * Name: host_path_convert
+ ****************************************************************************/
+
+static int host_path_convert(const char *path, char *abspath,
+ uint32_t buflen)
+{
+#ifndef CONFIG_SIM_HOSTFS_PATH_CONVERSION
+ strncpy(abspath, path, buflen);
+ abspath[buflen - 1] = '\0';
+ return 0;
+#else
+ int ret;
+ char *name;
+
+ if (path[0] == '/')
+ {
+ strncpy(abspath, path, buflen);
+ abspath[buflen - 1] = '\0';
+ return 0;
+ }
+
+ /* Get the absolute path of the executable file */
+
+# ifdef CONFIG_HOST_LINUX
+ ret = readlink("/proc/self/exe", abspath, buflen);
Review Comment:
isn't it simpler to use chdir(2)?
or maybe even openat family?
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