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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/CH24/EX24.2/Result2.txt | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '1088/CH24/EX24.2/Result2.txt')
| -rwxr-xr-x | 1088/CH24/EX24.2/Result2.txt | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/1088/CH24/EX24.2/Result2.txt b/1088/CH24/EX24.2/Result2.txt new file mode 100755 index 000000000..38007bf78 --- /dev/null +++ b/1088/CH24/EX24.2/Result2.txt @@ -0,0 +1,92 @@ + ans =
+
+ 1.
+
+-->exec('Example2.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 II- Files
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+Example 2 : Show the method of showing PID,PPID in both parent and child process
+
+ ****************************************************************
+
+ Answer :
+
+ INSTRUCTIONS :
+
+ 1.These programs are part of systems programming PURELY in Unix and the commands have NO EQUIVALENT IN SCILAB
+
+ 2.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
+
+ 3.The outputs displayed here are just MOCK OUTPUTS which are DISPLAYED IN THE TEXTBOOK
+
+ 4.The inconvenience is regretted.
+.............Press [ENTER] to continue..... UNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)
+
+
+
+
+$ cat fork.c # to open the file emp.lst /* Program: fork.c -- A simple fork Shows PID,PPID in both parent and child*/
+
+#include <stdio.h>
+#include <sys/types.h>
+
+int main(void) {
+ pid_t pid;
+
+ printf("Before forking\n");
+ pid = fork(); /* Replicates current processes */
+
+ if(pid >0) { /* In the parent process; make sure */
+ sleep(1); /* That the parent does not die before child */
+ printf("PARENT -- PID: %d PPID %d, CHILD PID: %d\n",getpid(),getppid(),pid);}
+
+ else if (pid == 0) /* In the child process */
+ printf("CHILD -- PID: %d PPID: %d\n",getpid(),getppid());
+ else { /* pid must be -1 here */
+ printf("Fork error\n");
+ exit(1);}
+ printf("Both process continue from here\n"); /* In both processes */
+ exit(0);
+}
+ $ cc fork.c $ a.out Before forking
+CHILD -- PID: 1556 PPID: 1555
+Both processes continue from here # This statement runs in child
+PARENT -- PID: 1555 PPID: 1450,CHILD PID: 1556
+Both processes continue from here ...as well as in parent
+
+
+
+$ 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)
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