GRASS GIS 8 Programmer's Manual  8.4.0dev(2024)-2653d7b383
copy_file.c
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1 /****************************************************************************
2  *
3  * MODULE: GRASS GIS library - copy_file.c
4  * AUTHOR(S): Paul Kelly
5  * PURPOSE: Function to copy one file to another.
6  * COPYRIGHT: (C) 2007 by the GRASS Development Team
7  *
8  * This program is free software under the GNU General Public
9  * License (>=v2). Read the file COPYING that comes with GRASS
10  * for details.
11  *
12  *****************************************************************************/
13 
14 #include <stdio.h>
15 #include <errno.h>
16 #include <string.h>
17 
18 #include <grass/gis.h>
19 
20 /**
21  * \brief Copies one file to another
22  *
23  * Creates a copy of a file. The destination file will be overwritten if it
24  * already exists, so the calling module should check this first if it is
25  * important.
26  *
27  * \param infile String containing path to source file
28  * \param outfile String containing path to destination file
29  *
30  * \return 1 on success; 0 if an error occurred (warning will be printed)
31  **/
32 
33 int G_copy_file(const char *infile, const char *outfile)
34 {
35  FILE *infp, *outfp;
36  int inchar, outchar;
37 
38  infp = fopen(infile, "r");
39  if (infp == NULL) {
40  G_warning("Cannot open %s for reading: %s", infile, strerror(errno));
41  return 0;
42  }
43 
44  outfp = fopen(outfile, "w");
45  if (outfp == NULL) {
46  G_warning("Cannot open %s for writing: %s", outfile, strerror(errno));
47  fclose(infp);
48  return 0;
49  }
50 
51  while ((inchar = getc(infp)) != EOF) {
52  /* Read a character at a time from infile until EOF
53  * and copy to outfile */
54  outchar = putc(inchar, outfp);
55  if (outchar != inchar) {
56  G_warning("Error writing to %s", outfile);
57  fclose(infp);
58  fclose(outfp);
59  return 0;
60  }
61  }
62  fflush(outfp);
63 
64  fclose(infp);
65  fclose(outfp);
66 
67  return 1;
68 }
#define NULL
Definition: ccmath.h:32
int G_copy_file(const char *infile, const char *outfile)
Copies one file to another.
Definition: copy_file.c:33
void G_warning(const char *,...) __attribute__((format(printf