ex/ex_mkexrc.c

   1 /*-
   2  * Copyright (c) 1992, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 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 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/stat.h>
  19
  20 #include <bitstring.h>
  21 #include <errno.h>
  22 #include <fcntl.h>
  23 #include <limits.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28
  29 #include "../common/common.h"
  30 #include "pathnames.h"
  31
  32 /*
  33  * ex_mkexrc -- :mkexrc[!] [file]
  34  *
  35  * Create (or overwrite) a .exrc file with the current info.
  36  *
  37  * PUBLIC: int ex_mkexrc __P((SCR *, EXCMD *));
  38  */
  39 int
  40 ex_mkexrc(SCR *sp, EXCMD *cmdp)
  41 {
  42         struct stat sb;
  43         FILE *fp;
  44         int fd, sverrno;
  45         char *fname;
  46         size_t flen;
  47
  48         switch (cmdp->argc) {
  49         case 0:
  50                 fname = _PATH_EXRC;
  51                 break;
  52         case 1:
  53                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  54                             fname, flen);
  55                 set_alt_name(sp, fname);
  56                 break;
  57         default:
  58                 abort();
  59         }
  60
  61         if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && !stat(fname, &sb)) {
  62                 msgq_str(sp, M_ERR, fname,
  63                     "137|%s exists, not written; use ! to override");
  64                 return (1);
  65         }
  66
  67         /* Create with max permissions of rw-r--r--. */
  68         if ((fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY,
  69             S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
  70                 msgq_str(sp, M_SYSERR, fname, "%s");
  71                 return (1);
  72         }
  73
  74         if ((fp = fdopen(fd, "w")) == NULL) {
  75                 sverrno = errno;
  76                 (void)close(fd);
  77                 goto e2;
  78         }
  79
  80         if (seq_save(sp, fp, "abbreviate ", SEQ_ABBREV) || ferror(fp))
  81                 goto e1;
  82         if (seq_save(sp, fp, "map ", SEQ_COMMAND) || ferror(fp))
  83                 goto e1;
  84         if (seq_save(sp, fp, "map! ", SEQ_INPUT) || ferror(fp))
  85                 goto e1;
  86         if (opts_save(sp, fp) || ferror(fp))
  87                 goto e1;
  88         if (fclose(fp)) {
  89                 sverrno = errno;
  90                 goto e2;
  91         }
  92
  93         msgq_str(sp, M_INFO, fname, "138|New exrc file: %s");
  94         return (0);
  95
  96 e1:     sverrno = errno;
  97         (void)fclose(fp);
  98 e2:     errno = sverrno;
  99         msgq_str(sp, M_SYSERR, fname, "%s");
 100         return (1);
 101 }