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 10.12 2000/07/14 14:29:20 skimo Exp $ (Berkeley) $Date: 2000/07/14 14:29:20 $";
  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(sp, cmdp)
  41         SCR *sp;
  42         EXCMD *cmdp;
  43 {
  44         struct stat sb;
  45         FILE *fp;
  46         int fd, sverrno;
  47         char *fname;
  48         size_t flen;
  49
  50         switch (cmdp->argc) {
  51         case 0:
  52                 fname = _PATH_EXRC;
  53                 break;
  54         case 1:
  55                 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
  56                             fname, flen);
  57                 set_alt_name(sp, fname);
  58                 break;
  59         default:
  60                 abort();
  61         }
  62
  63         if (!FL_ISSET(cmdp->iflags, E_C_FORCE) && !stat(fname, &sb)) {
  64                 msgq_str(sp, M_ERR, fname,
  65                     "137|%s exists, not written; use ! to override");
  66                 return (1);
  67         }
  68
  69         /* Create with max permissions of rw-r--r--. */
  70         if ((fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY,
  71             S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
  72                 msgq_str(sp, M_SYSERR, fname, "%s");
  73                 return (1);
  74         }
  75
  76         if ((fp = fdopen(fd, "w")) == NULL) {
  77                 sverrno = errno;
  78                 (void)close(fd);
  79                 goto e2;
  80         }
  81
  82         if (seq_save(sp, fp, "abbreviate ", SEQ_ABBREV) || ferror(fp))
  83                 goto e1;
  84         if (seq_save(sp, fp, "map ", SEQ_COMMAND) || ferror(fp))
  85                 goto e1;
  86         if (seq_save(sp, fp, "map! ", SEQ_INPUT) || ferror(fp))
  87                 goto e1;
  88         if (opts_save(sp, fp) || ferror(fp))
  89                 goto e1;
  90         if (fclose(fp)) {
  91                 sverrno = errno;
  92                 goto e2;
  93         }
  94
  95         msgq_str(sp, M_INFO, fname, "138|New exrc file: %s");
  96         return (0);
  97
  98 e1:     sverrno = errno;
  99         (void)fclose(fp);
 100 e2:     errno = sverrno;
 101         msgq_str(sp, M_SYSERR, fname, "%s");
 102         return (1);
 103 }