external/bsd/nvi/dist/ex/ex_mkexrc.c

   1 /*      $NetBSD: ex_mkexrc.c,v 1.2 2013/11/22 15:52:05 christos Exp $ */
   2 /*-
   3  * Copyright (c) 1992, 1993, 1994
   4  *      The Regents of the University of California.  All rights reserved.
   5  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   6  *      Keith Bostic.  All rights reserved.
   7  *
   8  * See the LICENSE file for redistribution information.
   9  */
  10
  11 #include "config.h"
  12
  13 #ifndef lint
  14 static const char sccsid[] = "Id: ex_mkexrc.c,v 10.13 2001/06/25 15:19:17 skimo Exp  (Berkeley) Date: 2001/06/25 15:19:17 ";
  15 #endif /* not lint */
  16
  17 #include <sys/types.h>
  18 #include <sys/queue.h>
  19 #include <sys/stat.h>
  20
  21 #include <bitstring.h>
  22 #include <errno.h>
  23 #include <fcntl.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <unistd.h>
  29
  30 #include "../common/common.h"
  31 #include "pathnames.h"
  32
  33 /*
  34  * ex_mkexrc -- :mkexrc[!] [file]
  35  *
  36  * Create (or overwrite) a .exrc file with the current info.
  37  *
  38  * PUBLIC: int ex_mkexrc __P((SCR *, EXCMD *));
  39  */
  40 int
  41 ex_mkexrc(SCR *sp, EXCMD *cmdp)
  42 {
  43         struct stat sb;
  44         FILE *fp;
  45         int fd, sverrno;
  46         const char *fname;
  47         size_t flen;
  48
  49         switch (cmdp->argc) {
  50         case 0:
  51                 fname = _PATH_EXRC;
  52                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  53                             fname, flen);
  54                 set_alt_name(sp, fname);
  55                 break;
  56         default:
  57                 abort();
  58         }
  59
  60         if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && !stat(fname, &sb)) {
  61                 msgq_str(sp, M_ERR, fname,
  62                     "137|%s exists, not written; use ! to override");
  63                 return (1);
  64         }
  65
  66         /* Create with max permissions of rw-r--r--. */
  67         if ((fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY,
  68             S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
  69                 msgq_str(sp, M_SYSERR, fname, "%s");
  70                 return (1);
  71         }
  72
  73         if ((fp = fdopen(fd, "w")) == NULL) {
  74                 sverrno = errno;
  75                 (void)close(fd);
  76                 goto e2;
  77         }
  78
  79         if (seq_save(sp, fp, "abbreviate ", SEQ_ABBREV) || ferror(fp))
  80                 goto e1;
  81         if (seq_save(sp, fp, "map ", SEQ_COMMAND) || ferror(fp))
  82                 goto e1;
  83         if (seq_save(sp, fp, "map! ", SEQ_INPUT) || ferror(fp))
  84                 goto e1;
  85         if (opts_save(sp, fp) || ferror(fp))
  86                 goto e1;
  87         if (fclose(fp)) {
  88                 sverrno = errno;
  89                 goto e2;
  90         }
  91
  92         msgq_str(sp, M_INFO, fname, "138|New exrc file: %s");
  93         return (0);
  94
  95 e1:     sverrno = errno;
  96         (void)fclose(fp);
  97 e2:     errno = sverrno;
  98         msgq_str(sp, M_SYSERR, fname, "%s");
  99         return (1);
 100 }