+/*-
+ * Copyright (c) 1980, 1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)misc.c 5.13 (Berkeley) 6/27/91";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
+#if __STDC__
+# include <stdarg.h>
+#else
+# include <varargs.h>
+#endif
+
+#include "csh.h"
+#include "extern.h"
+
+static int renum __P((int, int));
+
+int
+any(s, c)
+ register char *s;
+ register int c;
+{
+ if (!s)
+ return (0); /* Check for nil pointer */
+ while (*s)
+ if (*s++ == c)
+ return (1);
+ return (0);
+}
+
+void
+setzero(cp, i)
+ char *cp;
+ int i;
+{
+ if (i != 0)
+ do
+ *cp++ = 0;
+ while (--i);
+}
+
+char *
+strsave(s)
+ register char *s;
+{
+ char *n;
+ register char *p;
+
+ if (s == NULL)
+ s = "";
+ for (p = s; *p++;);
+ n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char)));
+ while (*p++ = *s++);
+ return (n);
+}
+
+Char **
+blkend(up)
+ register Char **up;
+{
+
+ while (*up)
+ up++;
+ return (up);
+}
+
+
+void
+blkpr(av)
+ register Char **av;
+{
+
+ for (; *av; av++) {
+ xprintf("%s", short2str(*av));
+ if (av[1])
+ xprintf(" ");
+ }
+}
+
+int
+blklen(av)
+ register Char **av;
+{
+ register int i = 0;
+
+ while (*av++)
+ i++;
+ return (i);
+}
+
+Char **
+blkcpy(oav, bv)
+ Char **oav;
+ register Char **bv;
+{
+ register Char **av = oav;
+
+ while (*av++ = *bv++)
+ continue;
+ return (oav);
+}
+
+Char **
+blkcat(up, vp)
+ Char **up, **vp;
+{
+
+ (void) blkcpy(blkend(up), vp);
+ return (up);
+}
+
+void
+blkfree(av0)
+ Char **av0;
+{
+ register Char **av = av0;
+
+ if (!av0)
+ return;
+ for (; *av; av++)
+ xfree((ptr_t) * av);
+ xfree((ptr_t) av0);
+}
+
+Char **
+saveblk(v)
+ register Char **v;
+{
+ register Char **newv =
+ (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **));
+ Char **onewv = newv;
+
+ while (*v)
+ *newv++ = Strsave(*v++);
+ return (onewv);
+}
+
+#ifdef NOTUSED
+char *
+strstr(s, t)
+ register char *s, *t;
+{
+ do {
+ register char *ss = s;
+ register char *tt = t;
+
+ do
+ if (*tt == '\0')
+ return (s);
+ while (*ss++ == *tt++);
+ } while (*s++ != '\0');
+ return (NULL);
+}
+
+#endif /* NOTUSED */
+
+#ifndef SHORT_STRINGS
+char *
+strspl(cp, dp)
+ char *cp, *dp;
+{
+ char *ep;
+ register char *p, *q;
+
+ if (!cp)
+ cp = "";
+ if (!dp)
+ dp = "";
+ for (p = cp; *p++;);
+ for (q = dp; *q++;);
+ ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char)));
+ for (p = ep, q = cp; *p++ = *q++;);
+ for (p--, q = dp; *p++ = *q++;);
+ return (ep);
+}
+
+#endif
+
+Char **
+blkspl(up, vp)
+ register Char **up, **vp;
+{
+ register Char **wp =
+ (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1),
+ sizeof(Char **));
+
+ (void) blkcpy(wp, up);
+ return (blkcat(wp, vp));
+}
+
+Char
+lastchr(cp)
+ register Char *cp;
+{
+
+ if (!cp)
+ return (0);
+ if (!*cp)
+ return (0);
+ while (cp[1])
+ cp++;
+ return (*cp);
+}
+
+/*
+ * This routine is called after an error to close up
+ * any units which may have been left open accidentally.
+ */
+void
+closem()
+{
+ register int f;
+
+ for (f = 0; f < NOFILE; f++)
+ if (f != SHIN && f != SHOUT && f != SHDIAG && f != OLDSTD &&
+ f != FSHTTY)
+ (void) close(f);
+}
+
+void
+donefds()
+{
+
+ (void) close(0);
+ (void) close(1);
+ (void) close(2);
+ didfds = 0;
+}
+
+/*
+ * Move descriptor i to j.
+ * If j is -1 then we just want to get i to a safe place,
+ * i.e. to a unit > 2. This also happens in dcopy.
+ */
+int
+dmove(i, j)
+ register int i, j;
+{
+
+ if (i == j || i < 0)
+ return (i);
+ if (j >= 0) {
+ (void) dup2(i, j);
+ if (j != i)
+ (void) close(i);
+ return (j);
+ }
+ j = dcopy(i, j);
+ if (j != i)
+ (void) close(i);
+ return (j);
+}
+
+int
+dcopy(i, j)
+ register int i, j;
+{
+
+ if (i == j || i < 0 || j < 0 && i > 2)
+ return (i);
+ if (j >= 0) {
+ (void) dup2(i, j);
+ return (j);
+ }
+ (void) close(j);
+ return (renum(i, j));
+}
+
+static int
+renum(i, j)
+ register int i, j;
+{
+ register int k = dup(i);
+
+ if (k < 0)
+ return (-1);
+ if (j == -1 && k > 2)
+ return (k);
+ if (k != j) {
+ j = renum(k, j);
+ (void) close(k);
+ return (j);
+ }
+ return (k);
+}
+
+/*
+ * Left shift a command argument list, discarding
+ * the first c arguments. Used in "shift" commands
+ * as well as by commands like "repeat".
+ */
+void
+lshift(v, c)
+ register Char **v;
+ register int c;
+{
+ register Char **u = v;
+
+ while (*u && --c >= 0)
+ xfree((ptr_t) * u++);
+ (void) blkcpy(v, u);
+}
+
+int
+number(cp)
+ Char *cp;
+{
+ if (!cp)
+ return(0);
+ if (*cp == '-') {
+ cp++;
+ if (!Isdigit(*cp))
+ return (0);
+ cp++;
+ }
+ while (*cp && Isdigit(*cp))
+ cp++;
+ return (*cp == 0);
+}
+
+Char **
+copyblk(v)
+ register Char **v;
+{
+ Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **));
+
+ return (blkcpy(nv, v));
+}
+
+#ifndef SHORT_STRINGS
+char *
+strend(cp)
+ register char *cp;
+{
+ if (!cp)
+ return (cp);
+ while (*cp)
+ cp++;
+ return (cp);
+}
+
+#endif /* SHORT_STRINGS */
+
+Char *
+strip(cp)
+ Char *cp;
+{
+ register Char *dp = cp;
+
+ if (!cp)
+ return (cp);
+ while (*dp++ &= TRIM)
+ continue;
+ return (cp);
+}
+
+void
+udvar(name)
+ Char *name;
+{
+
+ setname(short2str(name));
+ stderror(ERR_NAME | ERR_UNDVAR);
+}
+
+int
+prefix(sub, str)
+ register Char *sub, *str;
+{
+
+ for (;;) {
+ if (*sub == 0)
+ return (1);
+ if (*str == 0)
+ return (0);
+ if (*sub++ != *str++)
+ return (0);
+ }
+}
projects / unix-history / commitdiff