X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/b348deae3ddbb25802a5b533d91e06832212b48a..b4d30300b9cf6cdb77a95bd2018c7152f06ec94b:/popt/popthelp.c

diff --git a/popt/popthelp.c b/popt/popthelp.c
index c36ecead..6a009766 100644
--- a/popt/popthelp.c
+++ b/popt/popthelp.c
@@ -1,48 +1,117 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
 
-/* (C) 1998 Red Hat Software, Inc. -- Licensing details are in the COPYING
+/** \ingroup popt
+ * \file popt/popthelp.c
+ */
+
+/* (C) 1998-2002 Red Hat, Inc. -- Licensing details are in the COPYING
    file accompanying popt source distributions, available from 
-   ftp://ftp.redhat.com/pub/code/popt */
+   ftp://ftp.rpm.org/pub/rpm/dist. */
 
 #include "system.h"
+
+/*#define POPT_WCHAR_HACK*/
+#ifdef 	POPT_WCHAR_HACK
+#include <wchar.h>			/* for mbsrtowcs */
+/*@access mbstate_t @*/
+#endif
 #include "poptint.h"
 
+/*@access poptContext@*/
+
+/**
+ * Display arguments.
+ * @param con		context
+ * @param foo		(unused)
+ * @param key		option(s)
+ * @param arg		(unused)
+ * @param data		(unused)
+ */
 static void displayArgs(poptContext con,
-		/*@unused@*/ enum poptCallbackReason foo,
+		/*@unused@*/ UNUSED(enum poptCallbackReason foo),
 		struct poptOption * key, 
-		/*@unused@*/ const char * arg, /*@unused@*/ void * data) {
-    if (key->shortName== '?')
+		/*@unused@*/ UNUSED(const char * arg), /*@unused@*/ UNUSED(void * data))
+	/*@globals fileSystem@*/
+	/*@modifies fileSystem@*/
+{
+    if (key->shortName == '?')
 	poptPrintHelp(con, stdout, 0);
     else
 	poptPrintUsage(con, stdout, 0);
     exit(0);
 }
 
+#ifdef	NOTYET
+/*@unchecked@*/
+static int show_option_defaults = 0;
+#endif
+
+/**
+ * Empty table marker to enable displaying popt alias/exec options.
+ */
+/*@observer@*/ /*@unchecked@*/
+struct poptOption poptAliasOptions[] = {
+    POPT_TABLEEND
+};
+
+/**
+ * Auto help table options.
+ */
+/*@-castfcnptr@*/
+/*@observer@*/ /*@unchecked@*/
 struct poptOption poptHelpOptions[] = {
-    { NULL, '\0', POPT_ARG_CALLBACK, (void *)&displayArgs, '\0', NULL, NULL },
-    { "help", '?', 0, NULL, '?', N_("Show this help message"), NULL },
-    { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message"), NULL },
-    { NULL, '\0', 0, NULL, 0, NULL, NULL }
+  { NULL, '\0', POPT_ARG_CALLBACK, (void *)&displayArgs, '\0', NULL, NULL },
+  { "help", '?', 0, NULL, '?', N_("Show this help message"), NULL },
+  { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message"), NULL },
+    POPT_TABLEEND
 } ;
 
+/*@observer@*/ /*@unchecked@*/
+static struct poptOption poptHelpOptions2[] = {
+/*@-readonlytrans@*/
+  { NULL, '\0', POPT_ARG_INTL_DOMAIN, PACKAGE, 0, NULL, NULL},
+/*@=readonlytrans@*/
+  { NULL, '\0', POPT_ARG_CALLBACK, (void *)&displayArgs, '\0', NULL, NULL },
+  { "help", '?', 0, NULL, '?', N_("Show this help message"), NULL },
+  { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message"), NULL },
+#ifdef	NOTYET
+  { "defaults", '\0', POPT_ARG_NONE, &show_option_defaults, 0,
+	N_("Display option defaults in message"), NULL },
+#endif
+    POPT_TABLEEND
+} ;
 
-/*@observer@*/ /*@null@*/ static const char *const
-getTableTranslationDomain(const struct poptOption *table)
-{
-  const struct poptOption *opt;
+/*@observer@*/ /*@unchecked@*/
+struct poptOption * poptHelpOptionsI18N = poptHelpOptions2;
+/*@=castfcnptr@*/
 
-  for(opt = table;
-      opt->longName || opt->shortName || opt->arg;
-      opt++) {
-    if(opt->argInfo == POPT_ARG_INTL_DOMAIN)
-      return opt->arg;
-  }
+/**
+ * @param table		option(s)
+ */
+/*@observer@*/ /*@null@*/ static const char *
+getTableTranslationDomain(/*@null@*/ const struct poptOption *table)
+	/*@*/
+{
+    const struct poptOption *opt;
 
-  return NULL;
+    if (table != NULL)
+    for (opt = table; opt->longName || opt->shortName || opt->arg; opt++) {
+	if (opt->argInfo == POPT_ARG_INTL_DOMAIN)
+	    return opt->arg;
+    }
+    return NULL;
 }
 
-/*@observer@*/ /*@null@*/ static const char *const
-getArgDescrip(const struct poptOption * opt, const char *translation_domain)
+/**
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ */
+/*@observer@*/ /*@null@*/ static const char *
+getArgDescrip(const struct poptOption * opt,
+		/*@-paramuse@*/ /* FIX: i18n macros disabled with lclint */
+		/*@null@*/ UNUSED(const char * translation_domain))
+		/*@=paramuse@*/
+	/*@*/
 {
     if (!(opt->argInfo & POPT_ARG_MASK)) return NULL;
 
@@ -50,85 +119,345 @@ getArgDescrip(const struct poptOption * opt, const char *translation_domain)
 	if (opt->argDescrip) return POPT_(opt->argDescrip);
 
     if (opt->argDescrip) return D_(translation_domain, opt->argDescrip);
-    return POPT_("ARG");
+
+    switch (opt->argInfo & POPT_ARG_MASK) {
+    /*case POPT_ARG_NONE:	return POPT_("NONE");*/ /* impossible */
+#ifdef	DYING
+    case POPT_ARG_VAL:		return POPT_("VAL");
+#else
+    case POPT_ARG_VAL:		return NULL;
+#endif
+    case POPT_ARG_INT:		return POPT_("INT");
+    case POPT_ARG_LONG:		return POPT_("LONG");
+    case POPT_ARG_STRING:	return POPT_("STRING");
+    case POPT_ARG_FLOAT:	return POPT_("FLOAT");
+    case POPT_ARG_DOUBLE:	return POPT_("DOUBLE");
+    default:			return POPT_("ARG");
+    }
+}
+
+/**
+ * Display default value for an option.
+ * @param lineLength	display positions remaining
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ * @return
+ */
+static /*@only@*/ /*@null@*/ char *
+singleOptionDefaultValue(size_t lineLength,
+		const struct poptOption * opt,
+		/*@-paramuse@*/ /* FIX: i18n macros disabled with lclint */
+		/*@null@*/ UNUSED(const char * translation_domain))
+		/*@=paramuse@*/
+	/*@*/
+{
+    const char * defstr = D_(translation_domain, "default");
+    size_t limit, bufsize = 4*lineLength + 1;
+    char * le = malloc(bufsize);
+    char * l = le;
+
+    if (le == NULL) return NULL;	/* XXX can't happen */
+/*@-boundswrite@*/
+    *le++ = '(';
+    le += strlcpy(le, defstr, bufsize - 3);
+    *le++ = ':';
+    *le++ = ' ';
+    limit = bufsize - (le - l) - 1; /* -1 for closing paren */
+    if (opt->arg)	/* XXX programmer error */
+    switch (opt->argInfo & POPT_ARG_MASK) {
+    case POPT_ARG_VAL:
+    case POPT_ARG_INT:
+    {	long aLong = *((int *)opt->arg);
+	le += snprintf(le, limit, "%ld", aLong);
+    }	break;
+    case POPT_ARG_LONG:
+    {	long aLong = *((long *)opt->arg);
+	le += snprintf(le, limit, "%ld", aLong);
+    }	break;
+    case POPT_ARG_FLOAT:
+    {	double aDouble = *((float *)opt->arg);
+	le += snprintf(le, limit, "%g", aDouble);
+    }	break;
+    case POPT_ARG_DOUBLE:
+    {	double aDouble = *((double *)opt->arg);
+	le += snprintf(le, limit, "%g", aDouble);
+    }	break;
+    case POPT_ARG_STRING:
+    {	const char * s = *(const char **)opt->arg;
+	if (s == NULL) {
+	    le += strlcpy(le, "null", limit);
+	} else {
+	    size_t len;
+	    limit -= 2; /* make room for quotes */
+	    *le++ = '"';
+	    len = strlcpy(le, s, limit);
+	    if (len >= limit) {
+		le += limit - 3 - 1;
+		*le++ = '.'; *le++ = '.'; *le++ = '.';
+	    } else
+		le += len;
+	    *le++ = '"';
+	}
+    }	break;
+    case POPT_ARG_NONE:
+    default:
+	l = _free(l);
+	return NULL;
+	/*@notreached@*/ break;
+    }
+    *le++ = ')';
+    *le = '\0';
+/*@=boundswrite@*/
+
+    return l;
 }
 
-static void singleOptionHelp(FILE * f, int maxLeftCol, 
-			     const struct poptOption * opt,
-			     const char *translation_domain) {
-    int indentLength = maxLeftCol + 5;
-    int lineLength = 79 - indentLength;
+/**
+ * Display help text for an option.
+ * @param fp		output file handle
+ * @param maxLeftCol	largest argument display width
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ */
+static void singleOptionHelp(FILE * fp, size_t maxLeftCol, 
+		const struct poptOption * opt,
+		/*@null@*/ UNUSED(const char * translation_domain))
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
+    size_t indentLength = maxLeftCol + 5;
+    size_t lineLength = 79 - indentLength;
     const char * help = D_(translation_domain, opt->descrip);
-    int helpLength;
-    const char * ch;
-    char format[10];
-    char * left;
     const char * argDescrip = getArgDescrip(opt, translation_domain);
+    size_t helpLength;
+    char * defs = NULL;
+    char * left;
+    size_t lelen, limit;
+    size_t nb = maxLeftCol + 1;
+    int displaypad = 0;
+
+    /* Make sure there's more than enough room in target buffer. */
+    if (opt->longName)	nb += strlen(opt->longName);
+    if (argDescrip)	nb += strlen(argDescrip);
 
-    left = malloc(maxLeftCol + 1);
-    *left = '\0';
+/*@-boundswrite@*/
+    left = malloc(nb);
+    if (left == NULL) return;	/* XXX can't happen */
+    left[0] = '\0';
+    left[maxLeftCol] = '\0';
 
     if (opt->longName && opt->shortName)
-	sprintf(left, "-%c, --%s", opt->shortName, opt->longName);
-    else if (opt->shortName) 
-	sprintf(left, "-%c", opt->shortName);
+	snprintf(left, nb, "-%c, %s%s", opt->shortName,
+		((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "-" : "--"),
+		opt->longName);
+    else if (opt->shortName != '\0') 
+	snprintf(left, nb, "-%c", opt->shortName);
     else if (opt->longName)
-	sprintf(left, "--%s", opt->longName);
-    if (!*left) return ;
+	snprintf(left, nb, "%s%s",
+		((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "-" : "--"),
+		opt->longName);
+    if (!*left) goto out;
+
     if (argDescrip) {
-	strcat(left, "=");
-	strcat(left, argDescrip);
+	char * le = left + strlen(left);
+
+	if (opt->argInfo & POPT_ARGFLAG_OPTIONAL)
+	    *le++ = '[';
+
+	/* Choose type of output */
+	/*@-branchstate@*/
+	if (opt->argInfo & POPT_ARGFLAG_SHOW_DEFAULT) {
+	    defs = singleOptionDefaultValue(lineLength, opt, translation_domain);
+	    if (defs) {
+		size_t bufsize = (help ? strlen(help) : 0) + sizeof " " + strlen(defs);
+		char * t = malloc(bufsize);
+		if (t) {
+		    snprintf(t, bufsize, "%s %s", help ? help : "", defs);
+		    defs = _free(defs);
+		}
+		defs = t;
+	    }
+	}
+	/*@=branchstate@*/
+
+	if (opt->argDescrip == NULL) {
+	    switch (opt->argInfo & POPT_ARG_MASK) {
+	    case POPT_ARG_NONE:
+		break;
+	    case POPT_ARG_VAL:
+#ifdef	NOTNOW	/* XXX pug ugly nerdy output */
+	    {	long aLong = opt->val;
+		int ops = (opt->argInfo & POPT_ARGFLAG_LOGICALOPS);
+		int negate = (opt->argInfo & POPT_ARGFLAG_NOT);
+
+		/* Don't bother displaying typical values */
+		if (!ops && (aLong == 0L || aLong == 1L || aLong == -1L))
+		    break;
+		*le++ = '[';
+		switch (ops) {
+		case POPT_ARGFLAG_OR:
+		    *le++ = '|';
+		    /*@innerbreak@*/ break;
+		case POPT_ARGFLAG_AND:
+		    *le++ = '&';
+		    /*@innerbreak@*/ break;
+		case POPT_ARGFLAG_XOR:
+		    *le++ = '^';
+		    /*@innerbreak@*/ break;
+		default:
+		    /*@innerbreak@*/ break;
+		}
+		*le++ = (opt->longName != NULL ? '=' : ' ');
+		if (negate) *le++ = '~';
+		/*@-formatconst@*/
+		limit = nb - (le - left);
+		lelen = snprintf(le, limit, (ops ? "0x%lx" : "%ld"), aLong);
+		le += lelen >= limit ? limit - 1 : lelen;
+		/*@=formatconst@*/
+		*le++ = ']';
+	    }
+#endif
+		break;
+	    case POPT_ARG_INT:
+	    case POPT_ARG_LONG:
+	    case POPT_ARG_FLOAT:
+	    case POPT_ARG_DOUBLE:
+	    case POPT_ARG_STRING:
+		*le++ = (opt->longName != NULL ? '=' : ' ');
+		limit = nb - (le - left);
+		lelen = strlcpy(le, argDescrip, limit);
+		le += lelen >= limit ? limit - 1 : lelen;
+		break;
+	    default:
+		break;
+	    }
+	} else {
+
+	    *le++ = '=';
+	    limit = nb - (le - left);
+	    lelen = strlcpy(le, argDescrip, limit);
+	    if (lelen >= limit)
+		lelen = limit - 1;
+	    le += lelen;
+
+#ifdef	POPT_WCHAR_HACK
+	    {	const char * scopy = argDescrip;
+		mbstate_t t;
+		size_t n;
+
+		memset ((void *)&t, '\0', sizeof (t));	/* In initial state.  */
+		/* Determine number of characters.  */
+		n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t);
+
+		displaypad = (int) (lelen-n);
+	    }
+#endif
+	}
+	if (opt->argInfo & POPT_ARGFLAG_OPTIONAL)
+	    *le++ = ']';
+	*le = '\0';
     }
+/*@=boundswrite@*/
 
     if (help)
-	fprintf(f,"  %-*s   ", maxLeftCol, left);
+	fprintf(fp,"  %-*s   ", (int)maxLeftCol+displaypad, left);
     else {
-	fprintf(f,"  %s\n", left); 
+	fprintf(fp,"  %s\n", left); 
 	goto out;
     }
 
+    left = _free(left);
+/*@-branchstate@*/
+    if (defs) {
+	help = defs;
+	defs = NULL;
+    }
+/*@=branchstate@*/
+
     helpLength = strlen(help);
+/*@-boundsread@*/
     while (helpLength > lineLength) {
+	const char * ch;
+	char format[16];
+
 	ch = help + lineLength - 1;
-	while (ch > help && !isspace(*ch)) ch--;
+	while (ch > help && !isSpace(ch)) ch--;
 	if (ch == help) break;		/* give up */
-	while (ch > (help + 1) && isspace(*ch)) ch--;
+	while (ch > (help + 1) && isSpace(ch)) ch--;
 	ch++;
 
-	sprintf(format, "%%.%ds\n%%%ds", (int) (ch - help), indentLength);
-	fprintf(f, format, help, " ");
+	snprintf(format, sizeof format, "%%.%ds\n%%%ds", (int) (ch - help), (int) indentLength);
+	/*@-formatconst@*/
+	fprintf(fp, format, help, " ");
+	/*@=formatconst@*/
 	help = ch;
-	while (isspace(*help) && *help) help++;
+	while (isSpace(help) && *help) help++;
 	helpLength = strlen(help);
     }
+/*@=boundsread@*/
 
-    if (helpLength) fprintf(f, "%s\n", help);
+    if (helpLength) fprintf(fp, "%s\n", help);
 
 out:
-    free(left);
+    /*@-dependenttrans@*/
+    defs = _free(defs);
+    /*@=dependenttrans@*/
+    left = _free(left);
 }
 
-static int maxArgWidth(const struct poptOption * opt,
-		       const char * translation_domain) {
-    int max = 0;
-    int this;
+/**
+ * Find display width for longest argument string.
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ * @return		display width
+ */
+static size_t maxArgWidth(const struct poptOption * opt,
+		       /*@null@*/ UNUSED(const char * translation_domain))
+	/*@*/
+{
+    size_t max = 0;
+    size_t len = 0;
     const char * s;
     
+    if (opt != NULL)
     while (opt->longName || opt->shortName || opt->arg) {
 	if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
-	    this = maxArgWidth(opt->arg, translation_domain);
-	    if (this > max) max = this;
+	    if (opt->arg)	/* XXX program error */
+	    len = maxArgWidth(opt->arg, translation_domain);
+	    if (len > max) max = len;
 	} else if (!(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
-	    this = opt->shortName ? 2 : 0;
+	    len = sizeof("  ")-1;
+	    if (opt->shortName != '\0') len += sizeof("-X")-1;
+	    if (opt->shortName != '\0' && opt->longName) len += sizeof(", ")-1;
 	    if (opt->longName) {
-		if (this) this += 2;
-		this += strlen(opt->longName) + 2;
+		len += ((opt->argInfo & POPT_ARGFLAG_ONEDASH)
+			? sizeof("-")-1 : sizeof("--")-1);
+		len += strlen(opt->longName);
 	    }
 
 	    s = getArgDescrip(opt, translation_domain);
+
+#ifdef POPT_WCHAR_HACK
+	    /* XXX Calculate no. of display characters. */
+	    if (s) {
+		const char * scopy = s;
+		mbstate_t t;
+		size_t n;
+
+/*@-boundswrite@*/
+		memset ((void *)&t, '\0', sizeof (t));	/* In initial state.  */
+/*@=boundswrite@*/
+		/* Determine number of characters.  */
+		n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t);
+		len += sizeof("=")-1 + n;
+	    }
+#else
 	    if (s)
-		this += strlen(s) + 1;
-	    if (this > max) max = this;
+		len += sizeof("=")-1 + strlen(s);
+#endif
+
+	    if (opt->argInfo & POPT_ARGFLAG_OPTIONAL) len += sizeof("[]")-1;
+	    if (len > max) max = len;
 	}
 
 	opt++;
@@ -137,165 +466,361 @@ static int maxArgWidth(const struct poptOption * opt,
     return max;
 }
 
-static void singleTableHelp(FILE * f, const struct poptOption * table, 
-			    int left,
-			    const char *translation_domain) {
+/**
+ * Display popt alias and exec help.
+ * @param fp		output file handle
+ * @param items		alias/exec array
+ * @param nitems	no. of alias/exec entries
+ * @param left		largest argument display width
+ * @param translation_domain	translation domain
+ */
+static void itemHelp(FILE * fp,
+		/*@null@*/ poptItem items, int nitems, size_t left,
+		/*@null@*/ UNUSED(const char * translation_domain))
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
+    poptItem item;
+    int i;
+
+    if (items != NULL)
+    for (i = 0, item = items; i < nitems; i++, item++) {
+	const struct poptOption * opt;
+	opt = &item->option;
+	if ((opt->longName || opt->shortName) && 
+	    !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
+	    singleOptionHelp(fp, left, opt, translation_domain);
+    }
+}
+
+/**
+ * Display help text for a table of options.
+ * @param con		context
+ * @param fp		output file handle
+ * @param table		option(s)
+ * @param left		largest argument display width
+ * @param translation_domain	translation domain
+ */
+static void singleTableHelp(poptContext con, FILE * fp,
+		/*@null@*/ const struct poptOption * table, size_t left,
+		/*@null@*/ UNUSED(const char * translation_domain))
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
     const struct poptOption * opt;
     const char *sub_transdom;
 
-    opt = table;
-    while (opt->longName || opt->shortName || opt->arg) {
+    if (table == poptAliasOptions) {
+	itemHelp(fp, con->aliases, con->numAliases, left, NULL);
+	itemHelp(fp, con->execs, con->numExecs, left, NULL);
+	return;
+    }
+
+    if (table != NULL)
+    for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) {
 	if ((opt->longName || opt->shortName) && 
 	    !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
-	    singleOptionHelp(f, left, opt, translation_domain);
-	opt++;
+	    singleOptionHelp(fp, left, opt, translation_domain);
     }
 
-    opt = table;
-    while (opt->longName || opt->shortName || opt->arg) {
-	if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
-	    sub_transdom = getTableTranslationDomain(opt->arg);
-	    if(!sub_transdom)
-		sub_transdom = translation_domain;
+    if (table != NULL)
+    for (opt = table; (opt->longName || opt->shortName || opt->arg); opt++) {
+	if ((opt->argInfo & POPT_ARG_MASK) != POPT_ARG_INCLUDE_TABLE)
+	    continue;
+	sub_transdom = getTableTranslationDomain(opt->arg);
+	if (sub_transdom == NULL)
+	    sub_transdom = translation_domain;
 	    
-	    if (opt->descrip)
-		fprintf(f, "\n%s\n", D_(sub_transdom, opt->descrip));
+	if (opt->descrip)
+	    fprintf(fp, "\n%s\n", D_(sub_transdom, opt->descrip));
 
-	    singleTableHelp(f, opt->arg, left, sub_transdom);
-	}
-	opt++;
+	singleTableHelp(con, fp, opt->arg, left, sub_transdom);
     }
 }
 
-static int showHelpIntro(poptContext con, FILE * f) {
+/**
+ * @param con		context
+ * @param fp		output file handle
+ */
+static int showHelpIntro(poptContext con, FILE * fp)
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
     int len = 6;
     const char * fn;
 
-    fprintf(f, POPT_("Usage:"));
+    fprintf(fp, POPT_("Usage:"));
     if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) {
+/*@-boundsread@*/
+	/*@-nullderef -type@*/	/* LCL: wazzup? */
 	fn = con->optionStack->argv[0];
-	if (strchr(fn, '/')) fn = strchr(fn, '/') + 1;
-	fprintf(f, " %s", fn);
+	/*@=nullderef =type@*/
+/*@=boundsread@*/
+	if (fn == NULL) return len;
+	if (strchr(fn, '/')) fn = strrchr(fn, '/') + 1;
+	fprintf(fp, " %s", fn);
 	len += strlen(fn) + 1;
     }
 
     return len;
 }
 
-void poptPrintHelp(poptContext con, FILE * f, /*@unused@*/ int flags) {
-    int leftColWidth;
+void poptPrintHelp(poptContext con, FILE * fp, /*@unused@*/ UNUSED(int flags))
+{
+    size_t leftColWidth;
 
-    showHelpIntro(con, f);
+    (void) showHelpIntro(con, fp);
     if (con->otherHelp)
-	fprintf(f, " %s\n", con->otherHelp);
+	fprintf(fp, " %s\n", con->otherHelp);
     else
-	fprintf(f, " %s\n", POPT_("[OPTION...]"));
+	fprintf(fp, " %s\n", POPT_("[OPTION...]"));
 
     leftColWidth = maxArgWidth(con->options, NULL);
-    singleTableHelp(f, con->options, leftColWidth, NULL);
+    singleTableHelp(con, fp, con->options, leftColWidth, NULL);
 }
 
-static int singleOptionUsage(FILE * f, int cursor, 
-			     const struct poptOption * opt,
-			     const char *translation_domain) {
-    int len = 3;
+/**
+ * Display usage text for an option.
+ * @param fp		output file handle
+ * @param cursor	current display position
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ */
+static size_t singleOptionUsage(FILE * fp, size_t cursor, 
+		const struct poptOption * opt,
+		/*@null@*/ const char *translation_domain)
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
+    size_t len = 4;
     char shortStr[2] = { '\0', '\0' };
     const char * item = shortStr;
     const char * argDescrip = getArgDescrip(opt, translation_domain);
 
-    if (opt->shortName) {
-	if (!(opt->argInfo & POPT_ARG_MASK)) 
-	    return cursor;	/* we did these already */
+    if (opt->shortName != '\0' && opt->longName != NULL) {
+	len += 2;
+	if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++;
+	len += strlen(opt->longName);
+    } else if (opt->shortName != '\0') {
 	len++;
-	*shortStr = opt->shortName;
+	shortStr[0] = opt->shortName;
 	shortStr[1] = '\0';
     } else if (opt->longName) {
-	len += 1 + strlen(opt->longName);
+	len += strlen(opt->longName);
+	if (!(opt->argInfo & POPT_ARGFLAG_ONEDASH)) len++;
 	item = opt->longName;
     }
 
-    if (len == 3) return cursor;
+    if (len == 4) return cursor;
 
+#ifdef POPT_WCHAR_HACK
+    /* XXX Calculate no. of display characters. */
+    if (argDescrip) {
+	const char * scopy = argDescrip;
+	mbstate_t t;
+	size_t n;
+
+/*@-boundswrite@*/
+	memset ((void *)&t, '\0', sizeof (t));	/* In initial state.  */
+/*@=boundswrite@*/
+	/* Determine number of characters.  */
+	n = mbsrtowcs (NULL, &scopy, strlen(scopy), &t);
+	len += sizeof("=")-1 + n;
+    }
+#else
     if (argDescrip) 
-	len += strlen(argDescrip) + 1;
+	len += sizeof("=")-1 + strlen(argDescrip);
+#endif
 
     if ((cursor + len) > 79) {
-	fprintf(f, "\n       ");
+	fprintf(fp, "\n       ");
 	cursor = 7;
     } 
 
-    fprintf(f, " [-%s%s%s%s]", opt->shortName ? "" : "-", item,
-	    argDescrip ? (opt->shortName ? " " : "=") : "",
-	    argDescrip ? argDescrip : "");
+    if (opt->longName && opt->shortName) {
+	fprintf(fp, " [-%c|-%s%s%s%s]",
+	    opt->shortName, ((opt->argInfo & POPT_ARGFLAG_ONEDASH) ? "" : "-"),
+	    opt->longName,
+	    (argDescrip ? " " : ""),
+	    (argDescrip ? argDescrip : ""));
+    } else {
+	fprintf(fp, " [-%s%s%s%s]",
+	    ((opt->shortName || (opt->argInfo & POPT_ARGFLAG_ONEDASH)) ? "" : "-"),
+	    item,
+	    (argDescrip ? (opt->shortName != '\0' ? " " : "=") : ""),
+	    (argDescrip ? argDescrip : ""));
+    }
 
     return cursor + len + 1;
 }
 
-static int singleTableUsage(FILE * f, int cursor, const struct poptOption * table,
-		     const char *translation_domain) {
-    const struct poptOption * opt;
-    
-    opt = table;
-    while (opt->longName || opt->shortName || opt->arg) {
-        if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN)
+/**
+ * Display popt alias and exec usage.
+ * @param fp		output file handle
+ * @param cursor	current display position
+ * @param item		alias/exec array
+ * @param nitems	no. of ara/exec entries
+ * @param translation_domain	translation domain
+ */
+static size_t itemUsage(FILE * fp, size_t cursor,
+		/*@null@*/ poptItem item, int nitems,
+		/*@null@*/ UNUSED(const char * translation_domain))
+	/*@globals fileSystem @*/
+	/*@modifies *fp, fileSystem @*/
+{
+    int i;
+
+    /*@-branchstate@*/		/* FIX: W2DO? */
+    if (item != NULL)
+    for (i = 0; i < nitems; i++, item++) {
+	const struct poptOption * opt;
+	opt = &item->option;
+        if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) {
 	    translation_domain = (const char *)opt->arg;
-	else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) 
-	    cursor = singleTableUsage(f, cursor, opt->arg,
-				      translation_domain);
-	else if ((opt->longName || opt->shortName) && 
-		 !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN))
-	  cursor = singleOptionUsage(f, cursor, opt, translation_domain);
+	} else if ((opt->longName || opt->shortName) &&
+		 !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
+	    cursor = singleOptionUsage(fp, cursor, opt, translation_domain);
+	}
+    }
+    /*@=branchstate@*/
 
-	opt++;
+    return cursor;
+}
+
+/**
+ * Keep track of option tables already processed.
+ */
+typedef struct poptDone_s {
+    int nopts;
+    int maxopts;
+    const void ** opts;
+} * poptDone;
+
+/**
+ * Display usage text for a table of options.
+ * @param con		context
+ * @param fp		output file handle
+ * @param cursor	current display position
+ * @param opt		option(s)
+ * @param translation_domain	translation domain
+ * @param done		tables already processed
+ * @return
+ */
+static size_t singleTableUsage(poptContext con, FILE * fp, size_t cursor,
+		/*@null@*/ const struct poptOption * opt,
+		/*@null@*/ UNUSED(const char * translation_domain),
+		/*@null@*/ poptDone done)
+	/*@globals fileSystem @*/
+	/*@modifies *fp, done, fileSystem @*/
+{
+    /*@-branchstate@*/		/* FIX: W2DO? */
+    if (opt != NULL)
+    for (; (opt->longName || opt->shortName || opt->arg) ; opt++) {
+        if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INTL_DOMAIN) {
+	    translation_domain = (const char *)opt->arg;
+	} else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
+	    if (done) {
+		int i = 0;
+		for (i = 0; i < done->nopts; i++) {
+/*@-boundsread@*/
+		    const void * that = done->opts[i];
+/*@=boundsread@*/
+		    if (that == NULL || that != opt->arg)
+			/*@innercontinue@*/ continue;
+		    /*@innerbreak@*/ break;
+		}
+		/* Skip if this table has already been processed. */
+		if (opt->arg == NULL || i < done->nopts)
+		    continue;
+/*@-boundswrite@*/
+		if (done->nopts < done->maxopts)
+		    done->opts[done->nopts++] = (const void *) opt->arg;
+/*@=boundswrite@*/
+	    }
+	    cursor = singleTableUsage(con, fp, cursor, opt->arg,
+			translation_domain, done);
+	} else if ((opt->longName || opt->shortName) &&
+		 !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) {
+	    cursor = singleOptionUsage(fp, cursor, opt, translation_domain);
+	}
     }
+    /*@=branchstate@*/
 
     return cursor;
 }
 
-static int showShortOptions(const struct poptOption * opt, FILE * f, 
-			    char * str) {
-    char s[300];		/* this is larger then the ascii set, so
-				   it should do just fine */
+/**
+ * Return concatenated short options for display.
+ * @todo Sub-tables should be recursed.
+ * @param opt		option(s)
+ * @param fp		output file handle
+ * @retval str		concatenation of short options
+ * @return		length of display string
+ */
+static int showShortOptions(const struct poptOption * opt, FILE * fp,
+		/*@null@*/ char * str)
+	/*@globals fileSystem @*/
+	/*@modifies *str, *fp, fileSystem @*/
+	/*@requires maxRead(str) >= 0 @*/
+{
+    /* bufsize larger then the ascii set, lazy alloca on top level call. */
+    char * s = (str != NULL ? str : memset(alloca(300), 0, 300));
+    int len = 0;
 
-    s[0] = '\0';
-    if (str == NULL) {
-	memset(s, 0, sizeof(s));
-	str = s;
-    }
+    if (s == NULL)
+	return 0;
 
-    while (opt->longName || opt->shortName || opt->arg) {
+/*@-boundswrite@*/
+    if (opt != NULL)
+    for (; (opt->longName || opt->shortName || opt->arg); opt++) {
 	if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK))
-	    str[strlen(str)] = opt->shortName;
+	    s[strlen(s)] = opt->shortName;
 	else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
-	    showShortOptions(opt->arg, f, str);
-
-	opt++;
+	    if (opt->arg)	/* XXX program error */
+		len = showShortOptions(opt->arg, fp, s);
     } 
+/*@=boundswrite@*/
 
-    if (s != str || !*s)
-	return 0;
-
-    fprintf(f, " [-%s]", s);
-    return strlen(s) + 4;
+    /* On return to top level, print the short options, return print length. */
+    if (s == str && *s != '\0') {
+	fprintf(fp, " [-%s]", s);
+	len = strlen(s) + sizeof(" [-]")-1;
+    }
+    return len;
 }
 
-void poptPrintUsage(poptContext con, FILE * f, /*@unused@*/ int flags) {
-    int cursor;
-
-    cursor = showHelpIntro(con, f);
-    cursor += showShortOptions(con->options, f, NULL);
-    singleTableUsage(f, cursor, con->options, NULL);
+void poptPrintUsage(poptContext con, FILE * fp, /*@unused@*/ UNUSED(int flags))
+{
+    poptDone done = memset(alloca(sizeof(*done)), 0, sizeof(*done));
+    size_t cursor;
+
+    done->nopts = 0;
+    done->maxopts = 64;
+    cursor = done->maxopts * sizeof(*done->opts);
+/*@-boundswrite@*/
+    done->opts = memset(alloca(cursor), 0, cursor);
+    /*@-keeptrans@*/
+    done->opts[done->nopts++] = (const void *) con->options;
+    /*@=keeptrans@*/
+/*@=boundswrite@*/
+
+    cursor = showHelpIntro(con, fp);
+    cursor += showShortOptions(con->options, fp, NULL);
+    cursor = singleTableUsage(con, fp, cursor, con->options, NULL, done);
+    cursor = itemUsage(fp, cursor, con->aliases, con->numAliases, NULL);
+    cursor = itemUsage(fp, cursor, con->execs, con->numExecs, NULL);
 
     if (con->otherHelp) {
 	cursor += strlen(con->otherHelp) + 1;
-	if (cursor > 79) fprintf(f, "\n       ");
-	fprintf(f, " %s", con->otherHelp);
+	if (cursor > 79) fprintf(fp, "\n       ");
+	fprintf(fp, " %s", con->otherHelp);
     }
 
-    fprintf(f, "\n");
+    fprintf(fp, "\n");
 }
 
-void poptSetOtherOptionHelp(poptContext con, const char * text) {
-    if (con->otherHelp) xfree(con->otherHelp);
+void poptSetOtherOptionHelp(poptContext con, const char * text)
+{
+    con->otherHelp = _free(con->otherHelp);
     con->otherHelp = xstrdup(text);
 }