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

   1 /*      $NetBSD: ex_mkexrc.c,v 1.4 2014/11/27 20:00:09 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 #include <sys/cdefs.h>
  14 #if 0
  15 #ifndef lint
  16 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 ";
  17 #endif /* not lint */
  18 #else
  19 __RCSID("$NetBSD: ex_mkexrc.c,v 1.4 2014/11/27 20:00:09 christos Exp $");
  20 #endif
  21
  22 #include <sys/types.h>
  23 #include <sys/queue.h>
  24 #include <sys/stat.h>
  25
  26 #include <bitstring.h>
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <limits.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <unistd.h>
  34
  35 #include "../common/common.h"
  36 #include "pathnames.h"
  37
  38 /*
  39  * ex_mkexrc -- :mkexrc[!] [file]
  40  *
  41  * Create (or overwrite) a .exrc file with the current info.
  42  *
  43  * PUBLIC: int ex_mkexrc __P((SCR *, EXCMD *));
  44  */
  45 int
  46 ex_mkexrc(SCR *sp, EXCMD *cmdp)
  47 {
  48         struct stat sb;
  49         FILE *fp;
  50         int fd, sverrno;
  51         const char *fname;
  52         size_t flen;
  53
  54         switch (cmdp->argc) {
  55         case 1:
  56                 fname = _PATH_EXRC;
  57                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  58                             fname, flen);
  59                 set_alt_name(sp, fname);
  60                 break;
  61         default:
  62                 abort();
  63         }
  64
  65         if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && !stat(fname, &sb)) {
  66                 msgq_str(sp, M_ERR, fname,
  67                     "137|%s exists, not written; use ! to override");
  68                 return (1);
  69         }
  70
  71         /* Create with max permissions of rw-r--r--. */
  72         if ((fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY,
  73             S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
  74                 msgq_str(sp, M_SYSERR, fname, "%s");
  75                 return (1);
  76         }
  77
  78         if ((fp = fdopen(fd, "w")) == NULL) {
  79                 sverrno = errno;
  80                 (void)close(fd);
  81                 goto e2;
  82         }
  83
  84         if (seq_save(sp, fp, "abbreviate ", SEQ_ABBREV) || ferror(fp))
  85                 goto e1;
  86         if (seq_save(sp, fp, "map ", SEQ_COMMAND) || ferror(fp))
  87                 goto e1;
  88         if (seq_save(sp, fp, "map! ", SEQ_INPUT) || ferror(fp))
  89                 goto e1;
  90         if (opts_save(sp, fp) || ferror(fp))
  91                 goto e1;
  92         if (fclose(fp)) {
  93                 sverrno = errno;
  94                 goto e2;
  95         }
  96
  97         msgq_str(sp, M_INFO, fname, "138|New exrc file: %s");
  98         return (0);
  99
 100 e1:     sverrno = errno;
 101         (void)fclose(fp);
 102 e2:     errno = sverrno;
 103         msgq_str(sp, M_SYSERR, fname, "%s");
 104         return (1);
 105 }