#include "cvs.h"
static int deep_remove_dir PROTO((const char *path));
void
copy_file (from, to)
const char *from;
const char *to;
{
struct stat sb;
struct utimbuf t;
int fdin, fdout;
if (trace)
#ifdef SERVER_SUPPORT
(void) fprintf (stderr, "%c-> copy(%s,%s)\n",
(server_active) ? 'S' : ' ', from, to);
#else
(void) fprintf (stderr, "-> copy(%s,%s)\n", from, to);
#endif
if (noexec)
return;
if (islink (from))
{
char *source = xreadlink (from);
symlink (source, to);
free (source);
return;
}
if (isdevice (from))
{
if (stat (from, &sb) < 0)
error (1, errno, "cannot stat %s", from);
mknod (to, sb.st_mode, sb.st_rdev);
}
else
{
if ((fdin = open (from, O_RDONLY)) < 0)
error (1, errno, "cannot open %s for copying", from);
if (fstat (fdin, &sb) < 0)
error (1, errno, "cannot fstat %s", from);
if ((fdout = creat (to, (int) sb.st_mode & 07777)) < 0)
error (1, errno, "cannot create %s for copying", to);
if (sb.st_size > 0)
{
char buf[BUFSIZ];
int n;
for (;;)
{
n = read (fdin, buf, sizeof(buf));
if (n == -1)
{
#ifdef EINTR
if (errno == EINTR)
continue;
#endif
error (1, errno, "cannot read file %s for copying", from);
}
else if (n == 0)
break;
if (write(fdout, buf, n) != n) {
error (1, errno, "cannot write file %s for copying", to);
}
}
#ifdef HAVE_FSYNC
if (fsync (fdout))
error (1, errno, "cannot fsync file %s after copying", to);
#endif
}
if (close (fdin) < 0)
error (0, errno, "cannot close %s", from);
if (close (fdout) < 0)
error (1, errno, "cannot close %s", to);
}
memset ((char *) &t, 0, sizeof (t));
t.actime = sb.st_atime;
t.modtime = sb.st_mtime;
(void) utime (to, &t);
}
int
isdir (file)
const char *file;
{
struct stat sb;
if (stat (file, &sb) < 0)
return (0);
return (S_ISDIR (sb.st_mode));
}
int
islink (file)
const char *file;
{
#ifdef S_ISLNK
struct stat sb;
if (CVS_LSTAT (file, &sb) < 0)
return (0);
return (S_ISLNK (sb.st_mode));
#else
return (0);
#endif
}
int
isdevice (file)
const char *file;
{
struct stat sb;
if (CVS_LSTAT (file, &sb) < 0)
return (0);
#ifdef S_ISBLK
if (S_ISBLK (sb.st_mode))
return 1;
#endif
#ifdef S_ISCHR
if (S_ISCHR (sb.st_mode))
return 1;
#endif
return 0;
}
int
isfile (file)
const char *file;
{
return isaccessible(file, F_OK);
}
int
isreadable (file)
const char *file;
{
return isaccessible(file, R_OK);
}
int
iswritable (file)
const char *file;
{
return isaccessible(file, W_OK);
}
int
isaccessible (file, mode)
const char *file;
const int mode;
{
#ifdef SETXID_SUPPORT
struct stat sb;
int umask = 0;
int gmask = 0;
int omask = 0;
int uid;
if (stat(file, &sb) == -1)
return 0;
if (mode == F_OK)
return 1;
uid = geteuid();
if (uid == 0)
{
if (mode & X_OK)
return sb.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH);
else
return 1;
}
if (mode & R_OK)
{
umask |= S_IRUSR;
gmask |= S_IRGRP;
omask |= S_IROTH;
}
if (mode & W_OK)
{
umask |= S_IWUSR;
gmask |= S_IWGRP;
omask |= S_IWOTH;
}
if (mode & X_OK)
{
umask |= S_IXUSR;
gmask |= S_IXGRP;
omask |= S_IXOTH;
}
if (sb.st_uid == uid)
return (sb.st_mode & umask) == umask;
else if (sb.st_gid == getegid())
return (sb.st_mode & gmask) == gmask;
else
return (sb.st_mode & omask) == omask;
#else
return access(file, mode) == 0;
#endif
}
FILE *
open_file (name, mode)
const char *name;
const char *mode;
{
FILE *fp;
if ((fp = fopen (name, mode)) == NULL)
error (1, errno, "cannot open %s", name);
return (fp);
}
void
make_directory (name)
const char *name;
{
struct stat sb;
if (stat (name, &sb) == 0 && (!S_ISDIR (sb.st_mode)))
error (0, 0, "%s already exists but is not a directory", name);
if (!noexec && mkdir (name, 0777) < 0)
error (1, errno, "cannot make directory %s", name);
}
void
make_directories (name)
const char *name;
{
char *cp;
if (noexec)
return;
if (mkdir (name, 0777) == 0 || errno == EEXIST)
return;
if (! existence_error (errno))
{
error (0, errno, "cannot make path to %s", name);
return;
}
if ((cp = strrchr (name, '/')) == NULL)
return;
*cp = '\0';
make_directories (name);
*cp++ = '/';
if (*cp == '\0')
return;
(void) mkdir (name, 0777);
}
int
mkdir_if_needed (name)
char *name;
{
if (mkdir (name, 0777) < 0)
{
if (!(errno == EEXIST
|| (errno == EACCES && isdir (name))))
error (1, errno, "cannot make directory %s", name);
return 1;
}
return 0;
}
void
xchmod (fname, writable)
char *fname;
int writable;
{
struct stat sb;
mode_t mode, oumask;
if (preserve_perms)
return;
if (stat (fname, &sb) < 0)
{
if (!noexec)
error (0, errno, "cannot stat %s", fname);
return;
}
oumask = umask (0);
(void) umask (oumask);
if (writable)
{
mode = sb.st_mode | (~oumask
& (((sb.st_mode & S_IRUSR) ? S_IWUSR : 0)
| ((sb.st_mode & S_IRGRP) ? S_IWGRP : 0)
| ((sb.st_mode & S_IROTH) ? S_IWOTH : 0)));
}
else
{
mode = sb.st_mode & ~(S_IWRITE | S_IWGRP | S_IWOTH) & ~oumask;
}
if (trace)
#ifdef SERVER_SUPPORT
(void) fprintf (stderr, "%c-> chmod(%s,%o)\n",
(server_active) ? 'S' : ' ', fname,
(unsigned int) mode);
#else
(void) fprintf (stderr, "-> chmod(%s,%o)\n", fname,
(unsigned int) mode);
#endif
if (noexec)
return;
if (chmod (fname, mode) < 0)
error (0, errno, "cannot change mode of file %s", fname);
}
void
rename_file (from, to)
const char *from;
const char *to;
{
if (trace)
#ifdef SERVER_SUPPORT
(void) fprintf (stderr, "%c-> rename(%s,%s)\n",
(server_active) ? 'S' : ' ', from, to);
#else
(void) fprintf (stderr, "-> rename(%s,%s)\n", from, to);
#endif
if (noexec)
return;
if (rename (from, to) < 0)
error (1, errno, "cannot rename file %s to %s", from, to);
}
int
unlink_file (f)
const char *f;
{
if (trace)
#ifdef SERVER_SUPPORT
(void) fprintf (stderr, "%c-> unlink(%s)\n",
(server_active) ? 'S' : ' ', f);
#else
(void) fprintf (stderr, "-> unlink(%s)\n", f);
#endif
if (noexec)
return (0);
return (unlink (f));
}
int
unlink_file_dir (f)
const char *f;
{
struct stat sb;
if (trace
#ifdef SERVER_SUPPORT
&& !server_active
#endif
)
(void) fprintf (stderr, "-> unlink_file_dir(%s)\n", f);
if (noexec)
return (0);
if (stat (f, &sb) < 0)
{
if (existence_error (errno))
{
return -1;
}
}
else if (S_ISDIR (sb.st_mode))
return deep_remove_dir (f);
return unlink (f);
}
static int
deep_remove_dir (path)
const char *path;
{
DIR *dirp;
struct dirent *dp;
if (rmdir (path) != 0)
{
if (errno == ENOTEMPTY
|| errno == EEXIST
|| (ENOTEMPTY == 17 && EEXIST == 17 && errno == 87))
{
if ((dirp = opendir (path)) == NULL)
return -1;
while ((dp = readdir (dirp)) != NULL)
{
char *buf;
if (strcmp (dp->d_name, ".") == 0 ||
strcmp (dp->d_name, "..") == 0)
continue;
buf = xmalloc (strlen (path) + strlen (dp->d_name) + 5);
sprintf (buf, "%s/%s", path, dp->d_name);
if (isdir(buf))
{
if (deep_remove_dir(buf))
{
closedir(dirp);
free (buf);
return -1;
}
}
else
{
if (unlink (buf) != 0)
{
closedir(dirp);
free (buf);
return -1;
}
}
free (buf);
}
closedir (dirp);
return rmdir (path);
}
else
return -1;
}
return 0;
}
static size_t
block_read (fd, buf, nchars)
int fd;
char *buf;
size_t nchars;
{
char *bp = buf;
size_t nread;
do
{
nread = read (fd, bp, nchars);
if (nread == (size_t)-1)
{
#ifdef EINTR
if (errno == EINTR)
continue;
#endif
return (size_t)-1;
}
if (nread == 0)
break;
bp += nread;
nchars -= nread;
} while (nchars != 0);
return bp - buf;
}
int
xcmp (file1, file2)
const char *file1;
const char *file2;
{
char *buf1, *buf2;
struct stat sb1, sb2;
int fd1, fd2;
int ret;
if (CVS_LSTAT (file1, &sb1) < 0)
error (1, errno, "cannot lstat %s", file1);
if (CVS_LSTAT (file2, &sb2) < 0)
error (1, errno, "cannot lstat %s", file2);
if ((sb1.st_mode & S_IFMT) != (sb2.st_mode & S_IFMT))
return 1;
if (S_ISLNK (sb1.st_mode) && S_ISLNK (sb2.st_mode))
{
int result;
buf1 = xreadlink (file1);
buf2 = xreadlink (file2);
result = (strcmp (buf1, buf2) == 0);
free (buf1);
free (buf2);
return result;
}
if (S_ISBLK (sb1.st_mode) || S_ISCHR (sb1.st_mode))
{
if (sb1.st_rdev == sb2.st_rdev)
return 0;
else
return 1;
}
if ((fd1 = open (file1, O_RDONLY)) < 0)
error (1, errno, "cannot open file %s for comparing", file1);
if ((fd2 = open (file2, O_RDONLY)) < 0)
error (1, errno, "cannot open file %s for comparing", file2);
if (sb1.st_size != sb2.st_size)
ret = 1;
else if (sb1.st_size == 0)
ret = 0;
else
{
size_t buf_size = 8 * 1024;
size_t read1;
size_t read2;
buf1 = xmalloc (buf_size);
buf2 = xmalloc (buf_size);
do
{
read1 = block_read (fd1, buf1, buf_size);
if (read1 == (size_t)-1)
error (1, errno, "cannot read file %s for comparing", file1);
read2 = block_read (fd2, buf2, buf_size);
if (read2 == (size_t)-1)
error (1, errno, "cannot read file %s for comparing", file2);
ret = memcmp(buf1, buf2, read1);
} while (ret == 0 && read1 == buf_size);
free (buf1);
free (buf2);
}
(void) close (fd1);
(void) close (fd2);
return (ret);
}
#ifdef HAVE_TEMPNAM
char *
cvs_temp_name ()
{
char *retval;
retval = tempnam (Tmpdir, "cvs");
if (retval == NULL)
error (1, errno, "cannot generate temporary filename");
return retval;
}
#else
char *
cvs_temp_name ()
{
# ifdef HAVE_MKTEMP
char *value;
char *retval;
value = xmalloc (strlen (Tmpdir) + 40);
sprintf (value, "%s/%s", Tmpdir, "cvsXXXXXX" );
retval = mktemp (value);
if (retval == NULL)
error (1, errno, "cannot generate temporary filename");
return value;
# else
char value[L_tmpnam + 1];
char *retval;
retval = tmpnam (value);
if (retval == NULL)
error (1, errno, "cannot generate temporary filename");
return xstrdup (value);
# endif
}
#endif
int
isabsolute (filename)
const char *filename;
{
return filename[0] == '/';
}
char *
xreadlink (link)
const char *link;
{
char *file = NULL;
char *tfile;
int buflen = 128;
int link_name_len;
if (!islink (link))
return NULL;
do
{
file = xrealloc (file, buflen);
link_name_len = readlink (link, file, buflen - 1);
buflen *= 2;
}
while (link_name_len < 0 && errno == ENAMETOOLONG);
if (link_name_len < 0)
error (1, errno, "cannot readlink %s", link);
file[link_name_len] = '\0';
tfile = xstrdup (file);
free (file);
return tfile;
}
char *
last_component (path)
char *path;
{
char *last = strrchr (path, '/');
if (last && (last != path))
return last + 1;
else
return path;
}
char *
get_homedir ()
{
static char *home = NULL;
char *env = getenv ("HOME");
struct passwd *pw;
if (home != NULL)
return home;
if (env)
home = env;
else if ((pw = (struct passwd *) getpwuid (getuid ()))
&& pw->pw_dir)
home = xstrdup (pw->pw_dir);
else
return 0;
return home;
}
void
expand_wild (argc, argv, pargc, pargv)
int argc;
char **argv;
int *pargc;
char ***pargv;
{
int i;
*pargc = argc;
*pargv = (char **) xmalloc (argc * sizeof (char *));
for (i = 0; i < argc; ++i)
(*pargv)[i] = xstrdup (argv[i]);
}
#ifdef SERVER_SUPPORT
int
cvs_casecmp (str1, str2)
char *str1;
char *str2;
{
char *p;
char *q;
int pqdiff;
p = str1;
q = str2;
while ((pqdiff = tolower (*p) - tolower (*q)) == 0)
{
if (*p == '\0')
return 0;
++p;
++q;
}
return pqdiff;
}
int
fopen_case (name, mode, fp, pathp)
char *name;
char *mode;
FILE **fp;
char **pathp;
{
struct dirent *dp;
DIR *dirp;
char *dir;
char *fname;
char *found_name;
int retval;
dir = xstrdup (name);
fname = strrchr (dir, '/');
if (fname == NULL)
error (1, 0, "internal error: relative pathname in fopen_case");
*fname++ = '\0';
found_name = NULL;
dirp = CVS_OPENDIR (dir);
if (dirp == NULL)
{
if (existence_error (errno))
{
retval = errno;
goto out;
}
else
{
error (1, errno, "cannot read directory %s", dir);
}
}
errno = 0;
while ((dp = readdir (dirp)) != NULL)
{
if (cvs_casecmp (dp->d_name, fname) == 0)
{
if (found_name != NULL)
error (1, 0, "%s is ambiguous; could mean %s or %s",
fname, dp->d_name, found_name);
found_name = xstrdup (dp->d_name);
}
}
if (errno != 0)
error (1, errno, "cannot read directory %s", dir);
closedir (dirp);
if (found_name == NULL)
{
*fp = NULL;
retval = ENOENT;
}
else
{
char *p;
p = dir + strlen (dir);
*p++ = '/';
strcpy (p, found_name);
*fp = fopen (dir, mode);
if (*fp == NULL)
retval = errno;
else
retval = 0;
}
if (pathp == NULL)
free (dir);
else if (retval != 0)
free (dir);
else
*pathp = dir;
free (found_name);
out:
return retval;
}
#endif