initial commit / add all books

2 files changed, 166 insertions, 0 deletions

diff --git a/1088/CH24/EX24.2/Example2.sce b/1088/CH24/EX24.2/Example2.sce
new file mode 100755
index 000000000..32a03a740
--- /dev/null
+++ b/1088/CH24/EX24.2/Example2.sce
@@ -0,0 +1,74 @@
+clear
+flag=1
+mode(-1)
+clc
+
+printf("Example 2    :               Show the method of showing PID,PPID in both parent and child process \n")
+disp("****************************************************************")
+disp("Answer    :   ")
+disp("INSTRUCTIONS   : ")
+halt(' ')
+disp("1.These programs are part of systems programming PURELY in Unix and the commands have NO EQUIVALENT IN SCILAB")
+halt(' ')
+disp("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")
+halt(' ')
+disp("3.The outputs displayed here are just MOCK OUTPUTS which are DISPLAYED IN THE TEXTBOOK")
+halt(' ')
+disp("4.The inconvenience is regretted.")
+halt('.............Press [ENTER] to continue.....')
+halt("")
+clc
+printf("\tUNIX SHELL SIMULATOR(DEMO VERSION WITH PRELOADED COMMANDS)\n\n\n")
+i=0
+i=i+1;f(i)='/* Program: fork.c -- A simple fork Shows PID,PPID in both parent and child*/'
+i=i+1;f(i)=''
+i=i+1;f(i)='#include <stdio.h>'
+i=i+1;f(i)='#include <sys/types.h>'
+i=i+1;f(i)=''
+i=i+1;f(i)='int main(void) {'
+i=i+1;f(i)='    pid_t pid;'
+i=i+1;f(i)='    '
+i=i+1;f(i)='    printf('+ascii(34)+'Before forking\n'+ascii(34)+');'
+i=i+1;f(i)='    pid = fork();        /* Replicates current processes */'
+i=i+1;f(i)='    '
+i=i+1;f(i)='    if(pid >0) {         /* In the parent process; make sure */'
+i=i+1;f(i)='    sleep(1);            /* That the parent does not die before child */'
+i=i+1;f(i)='    printf('+ascii(34)+'PARENT -- PID: %d PPID %d, CHILD PID: %d\n'+ascii(34)+',getpid(),getppid(),pid);}'
+i=i+1;f(i)='    '
+i=i+1;f(i)='    else if (pid == 0)    /* In the child process */'
+i=i+1;f(i)='         printf('+ascii(34)+'CHILD -- PID: %d PPID: %d\n'+ascii(34)+',getpid(),getppid());'
+i=i+1;f(i)='    else {                 /* pid must be -1 here */'
+i=i+1;f(i)='         printf('+ascii(34)+'Fork error\n'+ascii(34)+');'
+i=i+1;f(i)='         exit(1);}'
+i=i+1;f(i)='    printf('+ascii(34)+'Both process continue from here\n'+ascii(34)+');  /* In both processes */'
+i=i+1;f(i)='    exit(0);'
+i=i+1;f(i)='}'
+n=i    
+
+printf("\n\n$ cat fork.c      # to open the file emp.lst")
+halt(' ')
+u=mopen('fork.c','wt')
+for i=1:n
+    mfprintf(u,"%s\n",f(i))
+    printf("%s\n",f(i))
+end
+mclose(u)
+halt('')
+clc
+
+halt(' ')
+ printf("$ cc fork.c")
+ halt(' ')
+ printf("$ a.out")
+ halt(' ')
+ printf("Before forking\nCHILD -- PID: 1556 PPID: 1555\nBoth processes continue from here         # This statement runs in child\nPARENT -- PID: 1555 PPID: 1450,CHILD PID: 1556\nBoth processes continue from here          ...as well as in parent\n")
+ halt(' ')
+
+printf("\n\n\n$ exit        #To exit the current simulation terminal and return to Scilab console\n\n")
+halt("........# (hit [ENTER] for result)")
+//clc()
+
+printf("\n\n\t\t\tBACK TO SCILAB CONSOLE...\nLoading initial environment')
+sleep(1000)
+
+
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)