| 1 | /*
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| 2 | * readfile.c - Read an entire file into a string.
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| 3 | *
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| 4 | * Arnold Robbins
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| 5 | * Tue Apr 23 17:43:30 IDT 2002
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| 6 | * Revised per Peter Tillier
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| 7 | * Mon Jun 9 17:05:11 IDT 2003
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| 8 | * Revised for new dynamic function facilities
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| 9 | * Mon Jun 14 14:53:07 IDT 2004
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| 10 | */
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| 11 |
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| 12 | /*
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| 13 | * Copyright (C) 2002, 2003, 2004 the Free Software Foundation, Inc.
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| 14 | *
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| 15 | * This file is part of GAWK, the GNU implementation of the
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| 16 | * AWK Programming Language.
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| 17 | *
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| 18 | * GAWK is free software; you can redistribute it and/or modify
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| 19 | * it under the terms of the GNU General Public License as published by
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| 20 | * the Free Software Foundation; either version 2 of the License, or
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| 21 | * (at your option) any later version.
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| 22 | *
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| 23 | * GAWK is distributed in the hope that it will be useful,
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| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 26 | * GNU General Public License for more details.
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| 27 | *
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| 28 | * You should have received a copy of the GNU General Public License
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| 29 | * along with this program; if not, write to the Free Software
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| 30 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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| 31 | */
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| 32 |
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| 33 | #include "awk.h"
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| 34 | #include <fcntl.h>
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| 35 |
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| 36 | #ifndef O_BINARY
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| 37 | #define O_BINARY 0
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| 38 | #endif
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| 39 |
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| 40 | /* do_readfile --- read a file into memory */
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| 41 |
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| 42 | NODE *
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| 43 | do_readfile(tree)
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| 44 | NODE *tree;
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| 45 | {
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| 46 | NODE *filename;
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| 47 | int ret = -1;
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| 48 | struct stat sbuf;
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| 49 | char *text;
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| 50 | int fd;
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| 51 |
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| 52 | if (do_lint && get_curfunc_arg_count() > 1)
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| 53 | lintwarn("readfile: called with too many arguments");
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| 54 |
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| 55 | filename = get_argument(tree, 0);
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| 56 | if (filename != NULL) {
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| 57 | (void) force_string(filename);
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| 58 |
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| 59 | ret = stat(filename->stptr, & sbuf);
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| 60 | if (ret < 0) {
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| 61 | update_ERRNO();
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| 62 | free_temp(filename);
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| 63 | goto done;
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| 64 | } else if ((sbuf.st_mode & S_IFMT) != S_IFREG) {
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| 65 | errno = EINVAL;
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| 66 | ret = -1;
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| 67 | update_ERRNO();
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| 68 | free_temp(filename);
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| 69 | goto done;
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| 70 | }
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| 71 |
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| 72 | if ((fd = open(filename->stptr, O_RDONLY|O_BINARY)) < 0) {
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| 73 | ret = -1;
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| 74 | update_ERRNO();
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| 75 | free_temp(filename);
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| 76 | goto done;
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| 77 | }
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| 78 |
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| 79 | emalloc(text, char *, sbuf.st_size + 2, "do_readfile");
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| 80 | memset(text, '\0', sbuf.st_size + 2);
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| 81 |
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| 82 | if ((ret = read(fd, text, sbuf.st_size)) != sbuf.st_size) {
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| 83 | (void) close(fd);
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| 84 | ret = -1;
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| 85 | update_ERRNO();
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| 86 | free_temp(filename);
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| 87 | goto done;
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| 88 | }
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| 89 |
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| 90 | close(fd);
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| 91 | free_temp(filename);
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| 92 | set_value(tmp_string(text, sbuf.st_size));
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| 93 | return tmp_number((AWKNUM) 0);
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| 94 | } else if (do_lint)
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| 95 | lintwarn("filename: called with no arguments");
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| 96 |
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| 97 |
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| 98 | done:
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| 99 | /* Set the return value */
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| 100 | set_value(tmp_number((AWKNUM) ret));
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| 101 |
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| 102 | /* Just to make the interpreter happy */
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| 103 | return tmp_number((AWKNUM) 0);
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| 104 | }
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| 105 |
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| 106 |
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| 107 | /* dlload --- load new builtins in this library */
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| 108 |
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| 109 | NODE *
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| 110 | dlload(tree, dl)
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| 111 | NODE *tree;
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| 112 | void *dl;
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| 113 | {
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| 114 | make_builtin("readfile", do_readfile, 1);
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| 115 |
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| 116 | return tmp_number((AWKNUM) 0);
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| 117 | }
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