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#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "imapfilter.h"
#include "pathnames.h"
extern environment env;
/*
* Create imapfilter's home directory.
*/
int
create_homedir(void)
{
int n;
char b;
char *hd;
n = snprintf(&b, 1, "%s/%s", env.home, PATHNAME_HOME);
if (env.pathmax != -1 && n > env.pathmax)
fatal(ERROR_PATHNAME,
"pathname limit %ld exceeded: %d\n", env.pathmax, n);
hd = (char *)xmalloc((n + 1) * sizeof(char));
snprintf(hd, n + 1, "%s/%s", env.home, PATHNAME_HOME);
if (!exists_dir(hd)) {
if (mkdir(hd, S_IRUSR | S_IWUSR | S_IXUSR))
error("could not create directory %s; %s\n", hd,
strerror(errno));
}
xfree(hd);
return 0;
}
/*
* Check if a file exists.
*/
int
exists_file(char *fname)
{
struct stat fs;
if (access(fname, F_OK))
return 0;
stat(fname, &fs);
if (!S_ISREG(fs.st_mode)) {
error("file %s not a regular file\n", fname);
return -1;
}
return 1;
}
/*
* Check if a directory exists.
*/
int
exists_dir(char *dname)
{
struct stat ds;
if (access(dname, F_OK))
return 0;
stat(dname, &ds);
if (!S_ISDIR(ds.st_mode)) {
error("file %s not a directory\n", dname);
return -1;
}
return 1;
}
/*
* Create a file with the specified permissions.
*/
int
create_file(char *fname, mode_t mode)
{
int fd;
fd = 0;
if (!exists_file(fname)) {
fd = open(fname, O_CREAT | O_WRONLY | O_TRUNC, mode);
if (fd == -1) {
error("could not create file %s; %s\n", fname,
strerror(errno));
return -1;
}
close(fd);
}
return 0;
}
/*
* Get the system's maximum number of bytes in a pathname.
*/
int
get_pathmax(void)
{
int n;
errno = 0;
n = pathconf("/", _PC_PATH_MAX);
if (n == -1 && errno != 0) {
error("getting PATH_MAX limit; %s\n", strerror(errno));
return -1;
}
env.pathmax = n;
return 0;
}
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