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#ifndef lint
static const char *rcsid = "$Id: file.c,v 1.6 1993/09/04 05:06:48 jkh Exp $";
#endif
/*
* FreeBSD install - a package for the installation and maintainance
* of non-core utilities.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Jordan K. Hubbard
* 18 July 1993
*
* Miscellaneous file access utilities.
*
*/
#include "lib.h"
/* Quick check to see if a file exists */
Boolean
fexists(char *fname)
{
if (!access(fname, F_OK))
return TRUE;
return FALSE;
}
/* Quick check to see if something is a directory */
Boolean
isdir(char *fname)
{
struct stat sb;
if (stat(fname, &sb) != FAIL &&
(sb.st_mode & S_IFDIR))
return TRUE;
else
return FALSE;
}
/* Check to see if file is a dir, and is empty */
Boolean
isempty(char *fname)
{
if (isdir(fname)) {
DIR *dirp;
struct dirent *dp;
dirp = opendir(fname);
if (!dirp)
return FALSE; /* no perms, leave it alone */
for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
if (strcmp(dp->d_name, ".") && strcmp(dp->d_name, "..")) {
closedir(dirp);
return FALSE;
}
}
(void)closedir(dirp);
return TRUE;
}
return FALSE;
}
char *
get_file_contents(char *fname)
{
char *contents;
struct stat sb;
int fd;
if (stat(fname, &sb) == FAIL)
barf("Can't stat '%s'.", fname);
contents = (char *)malloc(sb.st_size + 1);
fd = open(fname, O_RDONLY, 0);
if (fd == FAIL)
barf("Unable to open '%s' for reading.", fname);
if (read(fd, contents, sb.st_size) != sb.st_size)
barf("Short read on '%s' - did not get %d bytes.", fname, sb.st_size);
close(fd);
contents[sb.st_size] = '\0';
return contents;
}
/* Write the contents of "str" to a file */
void
write_file(char *name, char *str)
{
FILE *fp;
int len;
fp = fopen(name, "w");
if (!fp)
barf("Can't fopen '%s' for writing.", name);
len = strlen(str);
if (fwrite(str, 1, len, fp) != len)
barf("Short fwrite on '%s', tried to write %d bytes.", name, len);
if (fclose(fp))
barf("failure to fclose '%s'.", name);
}
void
copy_file(char *dir, char *fname, char *to)
{
if (vsystem("cp -p -r %s/%s %s", dir, fname, to))
barf("Couldn't copy %s/%s to %s!", dir, fname, to);
}
/*
* Copy a hierarchy (possibly from dir) to the current directory, or
* if "to" is TRUE, from the current directory to a location someplace
* else.
*
* Though slower, using tar to copy preserves symlinks and everything
* without me having to write some big hairy routine to do it.
*/
void
copy_hierarchy(char *dir, char *fname, Boolean to)
{
char cmd[FILENAME_MAX * 3];
if (!to) {
/* If absolute path, use it */
if (*fname == '/')
dir = "/";
sprintf(cmd, "tar cf - -C %s %s | tar xpf -", dir, fname);
}
else
sprintf(cmd, "tar cf - %s | tar xpf - -C %s", fname, dir);
#ifdef DEBUG
printf("Using '%s' to copy trees.\n", cmd);
#endif
if (system(cmd))
barf("copy_file: Couldn't perform '%s'", cmd);
}
/* Unpack a tar file */
int
unpack(char *pkg, char *flist)
{
char args[10], suffix[80], *cp;
/*
* Figure out by a crude heuristic whether this or not this is probably
* compressed.
*/
cp = rindex(pkg, '.');
if (cp) {
strcpy(suffix, cp + 1);
if (index(suffix, 'z') || index(suffix, 'Z'))
strcpy(args, "z");
}
strcat(args, "xpf");
if (vsystem("tar %s %s %s", args, pkg, flist ? flist : "")) {
whinge("Tar extract of %s failed!", pkg);
return 1;
}
return 0;
}
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