How to loop through dates using Bash?

Question

I have such bash script:

array=( \'2015-01-01\', \'2015-01-02\' )

for i in \"${array[@]}\"
do
    python /home/user/executeJobs.py {i} &> /home/user/         


        

Answer 1

I needed to loop through dates on AIX, BSDs, Linux, OS X and Solaris. The date command is one of the least portable and most miserable commands to use across platforms I have encountered. I found it easier to write a my_date command that just worked everywhere.

The C program below takes a starting date, and adds or subtracts days from it. If no date is supplied, it adds or subtracts days from the current date.

The my_date command allows you to perform the following everywhere:

start="2015-01-01"
stop="2015-01-31"

echo "Iterating dates from ${start} to ${stop}."

while [[ "${start}" != "${stop}" ]]
do
    python /home/user/executeJobs.py {i} &> "/home/user/${start}.log"
    start=$(my_date -s "${start}" -n +1)
done

And the C code:

#include 
#include 
#include 
#include 

int show_help();

int main(int argc, char* argv[])
{
    int eol = 0, help = 0, n_days = 0;
    int ret = EXIT_FAILURE;

    time_t startDate = time(NULL);
    const time_t ONE_DAY = 24 * 60 * 60;

    for (int i=0; i