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mbed-os
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fs: Fixed fstat retarget for regular files 

GCC's newlib library depends on fstat to get in-flight information about
a file's type an size. A working fstat for regular files is needed for
seek and related functions to work correctly.
pull/5203/head
Christopher Haster 2017-09-26 15:10:04 -05:00
parent c6f655c02e
commit 01326910c0
1 changed files with 13 additions and 4 deletions
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13
platform/mbed_retarget.cpp
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@ -446,6 +446,7 @@ int _lseek(FILEHANDLE fh, int offset, int whence)
#if defined(__ARMCC_VERSION) #if defined(__ARMCC_VERSION)
int whence = SEEK_SET; int whence = SEEK_SET;
#endif #endif
if (fh < 3) { if (fh < 3) {
errno = ESPIPE; errno = ESPIPE;
return -1; return -1;
@ -536,13 +537,21 @@ extern "C" __value_in_regs struct __initial_stackheap __user_setup_stackheap(uin
#if !defined(__ARMCC_VERSION) && !defined(__ICCARM__) #if !defined(__ARMCC_VERSION) && !defined(__ICCARM__)
extern "C" int _fstat(int fd, struct stat *st) { extern "C" int _fstat(int fh, struct stat *st) {
if (fd < 3) { if (fh < 3) {
st->st_mode = S_IFCHR; st->st_mode = S_IFCHR;
return 0; return 0;
} }
FileHandle* fhc = filehandles[fh-3];
if (fhc == NULL) {
errno = EBADF; errno = EBADF;
return -1; return -1;
}
st->st_mode = fhc->isatty() ? S_IFCHR : S_IFREG;
st->st_size = fhc->size();
return 0;
} }
#endif #endif