first commit; got the readme and main source file

README

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+practice
+========
+
+keep track of instrument practicing minutes
+
++-----+
+|USAGE|
++-----+
+
+=> record a practice session
+  $ practice
+wait until the end of your practice session, then control-c
+
+=> read out practice sessions in the current period (for a
+   report)
+  $ practice report
+
+=> read out a practice sessions for a given period (for a
+   report)
+  $ practice report 2
+
+=> start new reporting period
+  $ practice period
+
++------+
+|CONFIG|
++------+
+
+=> save location
+  #define SAVLOCO "/home/user/savelocation"
+
+=> name
+  $ practice name <name>
+
+=> instrument
+  $ practice instrument <instrument>
+
++----------------+
+|SAVE FILE FORMAT|
++----------------+
+
+HEADER
++-+-----------------------------+
+|1| <name>                      |
+|2| <instrument name>           |
++-+-----------------------------+
+
+The following lines can be in any order. It is left to the
+reader to determine what behavior they implement.
+
+PRACTICE SESSION
++----------------------+
+|P0210201923 Music in F|
++----------------------+
+
+- the first character of a practice session entry is always
+  ASCII P
+- the next two characters is the month, from 01-12
+- the next two characters is the day, from 01-31
+- the next four characters is the year, from 0000-9999
+- the next characters until the delimiting space are
+  considered the length of the practice session in
+  minutes, from 1-255
+- the next character, the delimiting space, delimits the
+  metadata on the left and the name of the piece on the right
+- the remaining characters are considered the name of the
+  piece you are practicing
+
+PERIOD
++-----------------+
+|S02 First Quarter|
++-----------------+
+- the first character of a period entry is always ASCII S
+- the next two characters is the ID, ranging from 00-99
+- the next character is the space delimiter
+- the following characters is the human readable period name
+
+END
++---+
+|END|
++---+
+- an end line is valid only if:
+  + the first character in the line should ALWAYS be ASCII E,
+    followed by ASCII N, and ASCII D.
+  + the line is located at the last line of the file
+
+AN EXAMPLE
++--+--------------------------------------------------------+
+|01|randomington userington                                 |
+|02|F Horn                                                  |
+|03|S00 First Quarter                                       |
+|04|P0908202024 Generic Practice                            |
+|05| ... more entries ...                                   |
+|06|S01 Second Quarter                                      |
+|07| ... more entries ...                                   |
+|08|END                                                     |
++--+--------------------------------------------------------+
+
++----+
+|BUGS|
++----+
+
+=> practice sessions fail due to starting in one day and
+   ending in another [will not fix]
+   + practicing in the middle of the night is never a good
+     idea
+
+This document, and all related articles shall be published
+under public domain. The author, randomuser,
+(randomuser@tilde.club) hereby discharges all warranty
+under applicable law, if legal.

main.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <signal.h>
+
+time_t buf;
+struct tm bt;
+struct tm et;
+int flg = 1;
+
+struct time {
+    int hour;
+    int min;
+};
+struct date {
+    int year;
+    int month;
+    int day;
+};
+
+void sighnd() { flg = 0; }
+void flgwt() { while(flg) { continue; } }
+
+int writeData(int fd, struct time time, int minutes);
+
+struct time timediff(struct tm f, struct tm l) {
+    struct time tmp;
+    tmp.hour = f.tm_hour - l.tm_hour;
+    tmp.min = f.tm_min - l.tm_min;
+    return tmp;
+}
+
+int main(int argc, char **argv) {
+    if(argc == 1) {
+        buf = time(NULL);
+	bt = *localtime(&buf);
+    }
+    printf("%d:%02d:%02d\n", bt.tm_hour, bt.tm_min, bt.tm_year + 1900);
+    signal(SIGINT, sighnd);
+    flgwt();
+    printf("exiting lol\n";
+    return 0;
+}