/* $OpenBSD: misc.c,v 1.12 2012/12/04 02:24:46 deraadt Exp $ */ /* $NetBSD: misc.c,v 1.6 1995/03/21 09:03:09 cgd Exp $ */ /*- * Copyright (c) 1980, 1991, 1993 * 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. 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. */ #include #include #include #include #include "csh.h" #include "extern.h" static int renum(int, int); int any(char *s, int c) { if (!s) return (0); /* Check for nil pointer */ while (*s) if (*s++ == c) return (1); return (0); } char * strsave(char *s) { char *n; char *p; if (s == NULL) s = ""; for (p = s; *p++;) continue; n = p = (char *) xmalloc((size_t) ((p - s) * sizeof(char))); while ((*p++ = *s++) != '\0') continue; return (n); } Char ** blkend(Char **up) { while (*up) up++; return (up); } void blkpr(FILE *fp, Char **av) { for (; *av; av++) { (void) fprintf(fp, "%s", vis_str(*av)); if (av[1]) (void) fprintf(fp, " "); } } int blklen(Char **av) { int i = 0; while (*av++) i++; return (i); } Char ** blkcpy(Char **oav, Char **bv) { Char **av = oav; while ((*av++ = *bv++) != NULL) continue; return (oav); } Char ** blkcat(Char **up, Char **vp) { (void) blkcpy(blkend(up), vp); return (up); } void blkfree(Char **av0) { Char **av = av0; if (!av0) return; for (; *av; av++) xfree((ptr_t) * av); xfree((ptr_t) av0); } Char ** saveblk(Char **v) { 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(char *s, char *t) { do { char *ss = s; char *tt = t; do if (*tt == '\0') return (s); while (*ss++ == *tt++); } while (*s++ != '\0'); return (NULL); } #endif /* NOTUSED */ #ifndef SHORT_STRINGS char * strspl(char *cp, char *dp) { char *ep; char *p, *q; if (!cp) cp = ""; if (!dp) dp = ""; for (p = cp; *p++;) continue; for (q = dp; *q++;) continue; ep = (char *) xmalloc((size_t) (((p - cp) + (q - dp) - 1) * sizeof(char))); for (p = ep, q = cp; *p++ = *q++;) continue; for (p--, q = dp; *p++ = *q++;) continue; return (ep); } #endif Char ** blkspl(Char **up, Char **vp) { Char **wp = (Char **) xcalloc((size_t) (blklen(up) + blklen(vp) + 1), sizeof(Char **)); (void) blkcpy(wp, up); return (blkcat(wp, vp)); } Char lastchr(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(void) { int f; for (f = 0; f < sysconf(_SC_OPEN_MAX); f++) if (f != SHIN && f != SHOUT && f != SHERR && f != OLDSTD && f != FSHTTY) (void) close(f); } void donefds(void) { (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(int i, int 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(int i, int 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(int i, int j) { 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(Char **v, int c) { Char **u; for (u = v; *u && --c >= 0; u++) xfree((ptr_t) *u); (void) blkcpy(v, u); } int number(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(Char **v) { Char **nv = (Char **) xcalloc((size_t) (blklen(v) + 1), sizeof(Char **)); return (blkcpy(nv, v)); } #ifndef SHORT_STRINGS char * strend(char *cp) { if (!cp) return (cp); while (*cp) cp++; return (cp); } #endif /* SHORT_STRINGS */ Char * strip(Char *cp) { Char *dp = cp; if (!cp) return (cp); while ((*dp++ &= TRIM) != '\0') continue; return (cp); } Char * quote(Char *cp) { Char *dp = cp; if (!cp) return (cp); while (*dp != '\0') *dp++ |= QUOTE; return (cp); } void udvar(Char *name) { setname(vis_str(name)); stderror(ERR_NAME | ERR_UNDVAR); } int prefix(Char *sub, Char *str) { for (;;) { if (*sub == 0) return (1); if (*str == 0) return (0); if (*sub++ != *str++) return (0); } }