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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/EX24.14/Result14.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/EX24.14/Result14.txt')
| -rwxr-xr-x | 1088/CH24/EX24.14/Result14.txt | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/1088/CH24/EX24.14/Result14.txt b/1088/CH24/EX24.14/Result14.txt new file mode 100755 index 000000000..47981ab33 --- /dev/null +++ b/1088/CH24/EX24.14/Result14.txt @@ -0,0 +1,96 @@ + ans =
+
+ 1.
+
+-->exec('Example14.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 14 : Show the use of generating signals and how the system can be made to catch it
+
+ ****************************************************************
+
+ 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 signal.c # to open the file emp.lst /* Program: signal.c -- Waits for 5 seconds for user input and then generates SIGALRM that has a handler specified */
+#include <stdio.h>
+#include <unistd.h>
+#include <signal.h>
+#define BUFSIZE 100
+
+void alrm_handler(int signo); /* Prototypes declarations for */
+void quit(char *message,int exit_status); /*signal handler and quit */
+
+char buf[BUFSIZE] = "foo\0"; /* Global variable */
+int main(void) {
+ int n;
+ if (signal(SIGALRM, alrm_handler) == SIG_ERR) /* signal returns SIG_ERR */
+ quit("sigalrm",1); /*on error*/
+
+ fprintf(stderr, "Enter filename: ");
+ alarm(5); /* Sets alarm clock;will deliver */
+ n = read(STDIN_FILENO, buf, BUFSIZE); /* SIGALRM in 5 seconds */
+ if (n>1) /* Will come here if user inputs */
+ printf("Filename: %s\n",buf); /* string within 5 seconds */
+ exit(0);
+}
+
+void alrm_handler(int signo) { /* Invoked with process recieves SIGALRM */
+ signal(SIGALRM, alrm_handler); /* Resetting signal handler */
+ fprintf(stderr, "\nSignal %d reeived, default filename: %s\n", signo, buf);
+ exit(1);
+}
+ $ cc signal.c $ a.out Enter filename: signal.log [-ENTER-]
+Filename: signal.log$ a.out Enter filename: # Nothing entered in 5 seconds
+Signal 14 received, default filename: foo $ kill -l | grep 14 # What is signal 14 13) SIGPIPE 14) SIGALRM 15) SIGTERM 16) SIGUSRI
+
+
+
+$ 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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