initial commit / add all books

2 files changed, 157 insertions, 0 deletions

diff --git a/1088/CH24/EX24.10/Example10.sce b/1088/CH24/EX24.10/Example10.sce
new file mode 100755
index 000000000..c7481229c
--- /dev/null
+++ b/1088/CH24/EX24.10/Example10.sce
@@ -0,0 +1,73 @@
+clear
+flag=1
+mode(-1)
+clc
+
+printf("Example 10    :    Show the effect of using dup command to achieve both input and output redirection\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: dup.c -- Uses dup to achieve both input and output redirection Closes standard streams first before using dup */'
+i=i+1;f(i)='#include <stdio.h>'
+i=i+1;f(i)='#include <unistd.h>'
+i=i+1;f(i)='#include <sys/stat.h>'
+i=i+1;f(i)='#include <fcntl.h>'
+i=i+1;f(i)='#define MODE600 (S_IRUSR | S_IWUSR)'
+i=i+1;f(i)=''
+i=i+1;f(i)='int main(int argc,char **argv) {'
+i=i+1;f(i)='    int fd1,int fd2;'
+i=i+1;f(i)='    fd1 = open(argv[1],O_RDONLY);'
+i=i+1;f(i)='    fd2 = open(argv[2], O_WRONLY | O_CREAT |O_TRUNC, MODE600);'
+i=i+1;f(i)='    '
+i=i+1;f(i)='    close(STDIN_FILENO);    /*This should return descriptor 0 */'
+i=i+1;f(i)='    dup(fd1);'
+i=i+1;f(i)='    close(STDOUT_FILENO);   /*This should return descriptor 1 */'
+i=i+1;f(i)='    dup(fd2);'
+i=i+1;f(i)='    '
+i=i+1;f(i)='    execvp(argv[3], &argv[3]);   /* Execute any filter */'
+i=i+1;f(i)='    printf('+ascii(34)+'Failed to exec filter'+ascii(34)+');'
+i=i+1;f(i)='}'
+n=i
+    
+
+printf("\n\n$ cat dup.c      # to open the file emp.lst")
+halt(' ')
+u=mopen('dup.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 shell.c")
+ halt(' ')
+ printf("$ a.out   /etc/passwd   passwd.cnt  wc  -1")
+ halt(' ')
+ printf("cat passwd.cnt")
+halt(' ')
+printf("        37   /etc/passwd")
+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/EX24.10/Result10.txt b/1088/CH24/EX24.10/Result10.txt
new file mode 100755
index 000000000..9448d5ccc
--- /dev/null
+++ b/1088/CH24/EX24.10/Result10.txt
@@ -0,0 +1,84 @@
+ ans  =

+ 

+    1.  

+ 

+-->exec('Example10.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                    :                                                                            24   

+ 

+ Chapter Title                         :                              Systems programming II- Files   

++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

+Example 10    :    Show the effect of using dup command to achieve both input and output redirection

+ 

+ ****************************************************************   

+ 

+ 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 dup.c      # to open the file emp.lst /* Program: dup.c -- Uses dup to achieve both input and output redirection Closes standard streams first before using dup */

+#include <stdio.h>

+#include <unistd.h>

+#include <sys/stat.h>

+#include <fcntl.h>

+#define MODE600 (S_IRUSR | S_IWUSR)

+

+int main(int argc,char **argv) {

+    int fd1,int fd2;

+    fd1 = open(argv[1],O_RDONLY);

+    fd2 = open(argv[2], O_WRONLY | O_CREAT |O_TRUNC, MODE600);

+    

+    close(STDIN_FILENO);    /*This should return descriptor 0 */

+    dup(fd1);

+    close(STDOUT_FILENO);   /*This should return descriptor 1 */

+    dup(fd2);

+    

+    execvp(argv[3], &argv[3]);   /* Execute any filter */

+    printf("Failed to exec filter");

+}

+ $ cc shell.c $ a.out   /etc/passwd   passwd.cnt  wc  -1 cat passwd.cnt         37   /etc/passwd 

+

+

+$ 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)