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    Executing a command with out using "system" command in C program

    I have written a c program to set the system date and time, in IRIX system.

    I have set permissions of super user to the executable file of the program.in the program i am using " system("date -u 09270000") like this.

    but output says that i don't have permissions to do so,even though i have superuser bit set.

    so how can i avoid this "system" command and set the time..
    please help me

    thanks in advance
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