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| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /1088/CH23/EX23.3/Result3.txt | |
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initial commit / add all books
Diffstat (limited to '1088/CH23/EX23.3/Result3.txt')
| -rwxr-xr-x | 1088/CH23/EX23.3/Result3.txt | 87 |
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diff --git a/1088/CH23/EX23.3/Result3.txt b/1088/CH23/EX23.3/Result3.txt new file mode 100755 index 000000000..39a1c4e08 --- /dev/null +++ b/1088/CH23/EX23.3/Result3.txt @@ -0,0 +1,87 @@ + ans =
+
+ 1.
+
+-->exec('Example3.sci')
+
+-->clear
+
+-->flag=1
+ flag =
+
+ 1.
+
+-->mode(-1)
+Current date is 23-Jun-2013
+
+Welcome to the Textbook Companionship Project 2013
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ Book Title : UNIX CONCEPTS AND APPLICATIONS
+
+ Book Edition : 4
+
+ Book Author : Sumitabha Das
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ Code Author : Pranav Bhat T
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+ Chapter Number : 23
+
+ Chapter Title : Systems programming I- Files
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+Example 3 : Show the effect of umask on permissions of a file
+
+ ****************************************************************
+
+ Answer :
+
+ INSTRUCTIONS :
+
+ 1.These programs are part of systems programming in Unix and the commands have NO EQUIVALENT IN SCILAB
+
+ 2.However if possible some selected programmes have been TRIED TO BE IMPLEMENTED
+
+ 3.For most of the programmes whose equivalent is NOT THERE IN SCILAB,only the output has been printed as given in the textbook w
+ ith no interactive input as in the programme below
+
+ 4.However the .c files which are displayed here are also made into a seperate file.If you are a unix user then try compiling and
+ running the programme with gcc or cc compiler
+
+ 5.The inconvenience is regretted.
+.............Press [ENTER] to continue..... UNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)
+
+
+
+
+$ cat umask.c # to open the file emp.lst /* Program: umask.c -- Changes umask twice and checks effect on permissions */
+
+#include <stdio.h>
+#include <fcntl.h>
+
+int main(void) {
+ mode_t old_mode,new_mode;
+
+ old_mode = umask(0); /* No mask */
+ printf("Previous umask value: %o\n", old_mode);
+
+ open("foo1",O_RDONLY | O_CREAT, 0777); /* Create file using new mask */
+ umask(old_mode); /* Revert to previous mask */
+ open("foo2",O_RDWR | O_CREAT, 0764); /* Create file using old mask */
+ exit(0);
+}
+ $ cc umask.c $ a.out Previous umask value: 22 $ ls -l foo?
+ -rwxrwxrwx 1 sumit sumit 0 Dec 1 12:01 foo1
+
+ -rwxr--r-- 1 sumit sumit 0 Dec 1 12:01 foo2
+
+
+
+$ exit #To exit the current simulation terminal and return to Scilab console
+
+........# (hit [ENTER] for result)
+
+ BACK TO SCILAB CONSOLE...
+Loading initial environment
+-->diary(0)
|