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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/EX24.15/Result15.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/EX24.15/Result15.txt')
| -rwxr-xr-x | 1088/CH24/EX24.15/Result15.txt | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/1088/CH24/EX24.15/Result15.txt b/1088/CH24/EX24.15/Result15.txt new file mode 100755 index 000000000..ec0989385 --- /dev/null +++ b/1088/CH24/EX24.15/Result15.txt @@ -0,0 +1,98 @@ + ans =
+
+ 1.
+
+-->exec('Example15.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 15 : Show the effect of [Ctrl-c] in the shell so as to do some operations
+
+ ****************************************************************
+
+ 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 signal2.c # to open the file emp.lst /* Program: signal2.c -- Handles SIGINT and SIGTSTP generated from terminal Required two [Ctrl-c]s to terminate */'
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+
+void quit(char *message, int exit_status) ;
+void tstp_handler(int signo); /* Handler for [Ctrl-z] */
+void int_handler(int signo); /* Handler for [Ctrl-c] */
+int n, count=0;
+
+int main(void) {
+ signal(SIGTSTP, tstp_handler); /* Disposition for these two signals */
+ signal(SIGINT, int_handler); /* set to enter respective handler */
+ signal(SIGQUIT, SIG_IGN); /* Disposition set to ignore */
+
+ fprintf(stderr,"Press [Ctrl-z] first, then [Ctrl-c]\n");
+ for(;;)
+ pause(); /* Will return on reciept of help */
+}
+
+void tstp_handler(int signo) {
+ signal(SIGTSTP, tstp_handler); /* Not entirely reliable */
+ fprintf(stderr, "Can't stop this program\n"); /* same signal can reset */
+} /* disposition to default */
+
+void int_handler(int signo) { /* Will terminate program */
+ signal(SIGINT, int_handler); /* on second invocation */
+ (++count == 1) ? printf("Press again\n") : quit("Quitting", 1);
+ $ cc signal2.c $ a.out Press [Ctrl-z] first, then [Ctrl-c]# [Ctrl - \] pressed Signal Ignored
+# [Ctrl - z] pressed
+Cannot stop this program From tstp_handler
+# [Ctrl - c] pressed
+Press again From int_handler
+# [Ctrl - c] pressed
+Quitting: Interrupted system call From int_handler
+
+
+$ 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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