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Diffstat (limited to 'src/LYexit.c')
| -rw-r--r-- | src/LYexit.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/LYexit.c b/src/LYexit.c new file mode 100644 index 0000000..8b94048 --- /dev/null +++ b/src/LYexit.c @@ -0,0 +1,185 @@ +/* + * $LynxId: LYexit.c,v 1.38 2020/02/25 10:14:48 tom Exp $ + * + * Copyright (c) 1994, University of Kansas, All Rights Reserved + * (most of this file was rewritten in 1996 and 2004). + */ +#include <HTUtils.h> +#include <LYexit.h> +#include <HTAlert.h> +#ifndef VMS +#include <LYGlobalDefs.h> +#include <LYUtils.h> +#include <LYSignal.h> +#include <LYMainLoop.h> +#endif /* !VMS */ +#include <LYStrings.h> +#include <LYClean.h> + +/* + * Flag for outofmem macro. - FM + */ +BOOL LYOutOfMemory = FALSE; + +/* + * Stack of functions to call upon exit. + */ +static void (*callstack[ATEXITSIZE]) (void); +static int topOfStack = 0; + +/* + * Capture "atexit()" calls for our own accounting. + */ +int LYatexit(void (*function) (void)) +{ + int result = 0; + + if (topOfStack >= ATEXITSIZE) { + CTRACE((tfp, "(LY)atexit: Too many functions, ignoring one!\n")); + result = -1; + } else { + int n; + BOOLEAN found = FALSE; + + for (n = 0; n < topOfStack; ++n) { + if (callstack[n] == function) { + found = TRUE; + break; + } + } + if (!found) { + callstack[topOfStack++] = function; + } + } + return result; +} + +/* + * Purpose: Call the functions registered with LYatexit + * Arguments: void + * Return Value: void + * Remarks/Portability/Dependencies/Restrictions: + * Revision History: + * 06-15-94 created Lynx 2-3-1 Garrett Arch Blythe + */ +static void LYCompleteExit(void) +{ + /* + * Just loop through registered functions. This is reentrant if more exits + * occur in the registered functions. + */ + while (--topOfStack >= 0) { + callstack[topOfStack] (); + } +} + +/* + * Purpose: Terminates program, reports memory not freed. + * Arguments: status Exit code. + * Return Value: void + * Remarks/Portability/Dependencies/Restrictions: + * Function calls stdlib.h exit + * Revision History: + * 06-15-94 created Lynx 2-3-1 Garrett Arch Blythe + */ +void LYexit(int status) +{ +#ifndef VMS /* On VMS, the VMSexit() handler does these. - FM */ +#ifdef _WINDOWS + DeleteCriticalSection(&critSec_READ); + + WSACleanup(); +#endif + if (LYOutOfMemory == TRUE) { + /* + * Ignore further interrupts. - FM + */ +#ifndef NOSIGHUP + (void) signal(SIGHUP, SIG_IGN); +#endif /* NOSIGHUP */ + (void) signal(SIGTERM, SIG_IGN); + (void) signal(SIGINT, SIG_IGN); +#ifndef __linux__ +#ifdef SIGBUS + (void) signal(SIGBUS, SIG_IGN); +#endif /* SIGBUS */ +#endif /* !__linux__ */ + (void) signal(SIGSEGV, SIG_IGN); + (void) signal(SIGILL, SIG_IGN); + + /* + * Flush all messages. - FM + */ + fflush(stderr); + fflush(stdout); + + /* + * Deal with curses, if on, and clean up. - FM + */ + if (LYCursesON) { + LYSleepAlert(); + } + cleanup_sig(0); +#ifndef __linux__ +#ifdef SIGBUS + signal(SIGBUS, SIG_DFL); +#endif /* SIGBUS */ +#endif /* !__linux__ */ + signal(SIGSEGV, SIG_DFL); + signal(SIGILL, SIG_DFL); + } +#endif /* !VMS */ + + /* + * Close syslog before doing atexit-cleanup, since it may use a string + * that would be freed there. + */ +#ifdef SYSLOG_REQUESTED_URLS + LYCloselog(); +#endif + + /* + * Do functions registered with LYatexit. - GAB + */ + LYCompleteExit(); + + LYCloseCmdLogfile(); + +#ifdef exit +/* Make sure we use stdlib exit and not LYexit. - GAB +*/ +#undef exit +#endif /* exit */ + + cleanup_files(); /* if someone starts with LYNXfoo: page */ +#ifndef VMS /* On VMS, the VMSexit() handler does these. - FM */ + fflush(stderr); + if (LYOutOfMemory == TRUE) { + LYOutOfMemory = FALSE; + printf("\r\n%s\r\n\r\n", MEMORY_EXHAUSTED_ABORT); + fflush(stdout); + } + LYCloseTracelog(); +#endif /* !VMS */ + show_alloc(); + +#if defined(NCURSES_VERSION) && defined(LY_FIND_LEAKS) +#if defined(HAVE_CURSES_EXIT) + curses_exit(status); +#elif defined(HAVE__NC_FREE_AND_EXIT) + _nc_free_and_exit(status); +#elif defined(HAVE__NC_FREEALL) + _nc_freeall(); +#endif +#endif /* NCURSES_VERSION */ + + exit(status); +} + +void outofmem(const char *fname, + const char *func) +{ + fprintf(stderr, "\n\n\n%s %s: %s\n", fname, func, MEMORY_EXHAUSTED_ABORTING); + LYOutOfMemory = TRUE; + LYexit(-1); +} |