/*- * Copyright (c) 1992, 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. 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[] = "@(#)ex_bang.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include "vi.h" #include "excmd.h" /* * ex_bang -- :[line [,line]] ! command * Pass the rest of the line after the ! character to * the program named by the SHELL environment variable. */ int ex_bang(sp, ep, cmdp) SCR *sp; EXF *ep; EXCMDARG *cmdp; { register int ch, len, modified; register char *p, *t; MARK rm; char *com; /* Make sure we got something. */ if (cmdp->string == NULL) { msgq(sp, M_ERR, "Usage: %s", cmdp->cmd->usage); return (1); } /* Figure out how much space we could possibly need. */ modified = 0; len = strlen(cmdp->string) + 1; for (p = cmdp->string; p = strpbrk(p, "!%#\\"); ++p) switch (*p) { case '!': if (sp->lastbcomm == NULL) { msgq(sp, M_ERR, "No previous command to replace \"!\"."); return (1); } len += strlen(sp->lastbcomm); modified = 1; break; case '%': if (F_ISSET(ep, F_NONAME)) { msgq(sp, M_ERR, "No filename to substitute for %%."); return (1); } len += ep->nlen; modified = 1; break; case '#': if (F_ISSET(ep, F_NONAME)) { msgq(sp, M_ERR, "No filename to substitute for #."); return (1); } len += ep->nlen; modified = 1; break; case '\\': if (*p) ++p; break; } /* Allocate space. */ if ((com = malloc(len)) == NULL) { msgq(sp, M_ERR, "Error: %s", strerror(errno)); return (1); } /* Fill it in. */ if (modified) { for (p = cmdp->string, t = com; ch = *p; ++p) switch (ch) { case '!': len = strlen(sp->lastbcomm); memmove(t, sp->lastbcomm, len); t += len; break; case '%': memmove(t, ep->name, ep->nlen); t += ep->nlen; break; case '#': memmove(t, ep->name, ep->nlen); t += ep->nlen; break; case '\\': if (*p) ch = *++p; /* FALLTHROUGH */ default: *t++ = ch; } *t = '\0'; } else memmove(com, cmdp->string, len); /* Swap commands. */ if (sp->lastbcomm != NULL) free(sp->lastbcomm); sp->lastbcomm = com; if (modified) (void)fprintf(sp->stdfp, "%s\n", com); /* * If addresses were specified, pipe lines from the file through * the command. */ if (cmdp->addrcnt != 0) { if (filtercmd(sp, ep, &cmdp->addr1, &cmdp->addr2, &rm, com, STANDARD)) return (1); sp->lno = rm.lno; F_SET(sp, S_AUTOPRINT); return (0); } /* If no addresses were specified, run the command. */ AUTOWRITE(sp, ep); MODIFY_WARN(sp, ep); /* Run the command. */ if (ex_run_process(sp, com, NULL, NULL, 0)) return (1); /* Ex terminates with a bang. */ if (F_ISSET(sp, S_MODE_EX)) (void)fprintf(sp->stdfp, "!\n"); return (0); }