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Add fileCreation/getCreation create-time accessors (#7000)

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* Add fileCreation/getCreation create-time accessors

For SDFS and LittleFS, enable a creation time accessor for files and Dir
iterators, similar to the existing fileTime/getLastWrite calls.

Remove spurious Dir::getLastWrite method (the proper and only documented
way is really Dir::fileTime).

Update json to point to new mklittlefs which copies the creation date of
files to the image.

Fixes #6992

* Remove malloc(), use stack vars for temp names

LFS filenames are limited in size and generally very small.  Use a stack
variable instead of a dynamic allocation when performing full-path
computations.

* Replace "Creation" w/"CreationTime" in FS accessor

Per review, `getCreation` -> `getCreationTime`, `fileCreation` ->
`fileCreationTime`.

The names `fileTime()` and `getLastWrite()` are inherited from ESP32
implementation and unchanged.

* Add creation time to listfiles SD example

* Enable SdFat's sateTime callback for timestamping

SdFat requries the dateTimeCallback call (global for everything) to
update dates and times on created files.

Because the callback signature doesn't have space for us to provide
any parameters, we cannot get the the File, Dir, or FS object's
dateTimeCB member.  Instead, just go with `time(null)` as the callback
function which is right in all but the most esoteric cases.

* Correct DOS year/month offset in dateTime callback

* Fix docs to match new xxxCreationTime() API names

Co-authored-by: Develo <deveyes@gmail.com>
This commit is contained in:
Earle F. Philhower, III
2020-02-22 12:49:08 -08:00
committed by GitHub
parent 4eca62cb53
commit bea64dfa69
10 changed files with 176 additions and 83 deletions
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14
libraries/SD/examples/listfiles/listfiles.ino
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@ -29,9 +29,6 @@ File root;
void setup() {
// Open serial communications and wait for port to open:
Serial.begin(115200);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.print("Initializing SD card...");
@ -71,11 +68,12 @@ void printDirectory(File dir, int numTabs) {
// files have sizes, directories do not
Serial.print("\t\t");
Serial.print(entry.size(), DEC);
Serial.print("\t\t");
time_t ft = entry.getLastWrite();
struct tm *tm = localtime(&ft);
// US format. Feel free to convert to your own locale...
Serial.printf("%02d-%02d-%02d %02d:%02d:%02d\n", tm->tm_mon + 1, tm->tm_mday, tm->tm_year % 100, tm->tm_hour, tm->tm_min, tm->tm_sec);
time_t cr = entry.getCreationTime();
time_t lw = entry.getLastWrite();
struct tm * tmstruct = localtime(&cr);
Serial.printf("\tCREATION: %d-%02d-%02d %02d:%02d:%02d", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
tmstruct = localtime(&lw);
Serial.printf("\tLAST WRITE: %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
}
entry.close();
}