72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
// $Id: ctrlc.c,v 1.2 2002-11-19 15:56:26 bdenney Exp $
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//
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// ctrlc.c
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//
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// This tests whether we can trap control-C or not.
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//
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//////////
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// Results with redhat 6.2 box:
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// compiler: gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)
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// glibc version 2.1.3
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// libpthread version 0.8
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// readline 4.3
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline
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// and it works fine
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline -pthread
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// FAILS: control-C's are not handled during readline().
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//////////
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// Results on Debian 3.0 box:
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// compiler: gcc version 2.95.4 20011002 (Debian prerelease)
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// glibc version 2.2.5
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// libpthread version 0.9
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline
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// and it works fine.
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline -pthread
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// and it works fine.
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//////////
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// Results on Redhat 7.3 box:
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// compiler: gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-113)
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// glibc version 2.2.5
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// libpthread version 0.9
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// readline version 4.2
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline -ltermcap
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// and it works fine.
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// Compile with: gcc -Wall -g ctrlc.c -o ctrlc -lreadline -ltermcap -pthread
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// and it works fine.
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//////////
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//
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// Conclusion:
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// My libc/libpthread is just too old. Even with the newest version of
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// readline 4.3, control-C handling does not work right. Every newer system
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// I've tried does not have this problem.
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#include <stdio.h>
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#include <signal.h>
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#include <readline/readline.h>
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void handler (int signal)
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{
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printf ("Signal handler was called. You must have pressed control-C.\n");
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}
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int main()
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{
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char buf[1024];
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printf ("**************\n");
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printf ("* $Id: ctrlc.c,v 1.2 2002-11-19 15:56:26 bdenney Exp $\n");
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printf ("**************\n");
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printf ("\n");
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printf ("If you press control-c now, it will terminate the process.\n");
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printf ("Press ENTER, and I will install the signal handler.\n");
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fgets (buf, sizeof(buf), stdin);
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printf ("Installing the signal handler.\n");
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signal (SIGINT, handler);
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printf ("If you press control-C now, it should call the signal handler.\n");
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printf ("Using fgets to read one line of input...\n");
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fgets (buf, sizeof(buf), stdin);
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printf ("If you press control-C now, it should call the signal handler.\n");
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readline ("Using readline to read one line of input...");
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printf ("\nDone\n");
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return 0;
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}
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