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NetBSD/usr.sbin/pkg_install/lib/file.c

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/* $NetBSD: file.c,v 1.20 1998/10/13 10:00:09 agc Exp $ */
#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char *rcsid = "from FreeBSD Id: file.c,v 1.29 1997/10/08 07:47:54 charnier Exp";
#else
__RCSID("$NetBSD: file.c,v 1.20 1998/10/13 10:00:09 agc Exp $");
#endif
#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"
#include <sys/wait.h>
#include <assert.h>
#include <err.h>
#include <netdb.h>
#include <pwd.h>
#include <time.h>
/* This is as ftpGetURL from FreeBSD's ftpio.c, except that it uses
* NetBSD's ftp command to do all FTP, which will DTRT for proxies,
* etc.
*/
static FILE *
ftpGetURL(char *url, int *retcode)
{
FILE *ftp;
pid_t pid_ftp;
int p[2];
*retcode=0;
if (pipe(p) < 0) {
*retcode = 1;
return NULL;
}
pid_ftp = fork();
if (pid_ftp < 0) {
*retcode = 1;
return NULL;
}
if (pid_ftp == 0) {
/* child */
dup2(p[1],1);
close(p[1]);
fprintf(stderr, ">>> ftp -o - %s\n",url);
execl("/usr/bin/ftp","ftp","-V","-o","-",url,NULL);
exit(1);
} else {
/* parent */
ftp = fdopen(p[0],"r");
close(p[1]);
if (ftp == (FILE *) NULL) {
*retcode = 1;
return NULL;
}
}
return ftp;
}
/* Quick check to see if a file exists */
Boolean
fexists(char *fname)
{
struct stat dummy;
if (!lstat(fname, &dummy))
return TRUE;
return FALSE;
}
/* Quick check to see if something is a directory */
Boolean
isdir(char *fname)
{
struct stat sb;
if (lstat(fname, &sb) != FAIL && S_ISDIR(sb.st_mode))
return TRUE;
else
return FALSE;
}
/* Check if something is a link to a directory */
Boolean
islinktodir(char *fname)
{
struct stat sb;
if (lstat(fname, &sb) != FAIL && S_ISLNK(sb.st_mode))
if (stat(fname, &sb) != FAIL && S_ISDIR(sb.st_mode))
return TRUE; /* link to dir! */
else
return FALSE; /* link to non-dir */
else
return FALSE; /* non-link */
}
/* Check to see if file is a dir, and is empty */
Boolean
isemptydir(char *fname)
{
if (isdir(fname) || islinktodir(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;
}
Boolean
isfile(char *fname)
{
struct stat sb;
if (stat(fname, &sb) != FAIL && S_ISREG(sb.st_mode))
return TRUE;
return FALSE;
}
/* Check to see if file is a file and is empty. If nonexistent or not
a file, say "it's empty", otherwise return TRUE if zero sized. */
Boolean
isemptyfile(char *fname)
{
struct stat sb;
if (stat(fname, &sb) != FAIL && S_ISREG(sb.st_mode)) {
if (sb.st_size != 0)
return FALSE;
}
return TRUE;
}
/* Returns TRUE if file is a URL specification */
Boolean
isURL(char *fname)
{
/*
* I'm sure there are other types of URL specifications that I could
* also be looking for here, but for now I'll just be happy to get ftp
* working.
*/
if (!fname)
return FALSE;
while (isspace(*fname))
++fname;
if (!strncmp(fname, "ftp://", 6))
return TRUE;
return FALSE;
}
/* Returns the host part of a URL */
char *
fileURLHost(char *fname, char *where, int max)
{
char *ret;
while (isspace(*fname))
++fname;
/* Don't ever call this on a bad URL! */
fname += strlen("ftp://");
/* Do we have a place to stick our work? */
if ((ret = where) != NULL) {
while (*fname && *fname != '/' && max--)
*where++ = *fname++;
*where = '\0';
return ret;
}
/* If not, they must really want us to stomp the original string */
ret = fname;
while (*fname && *fname != '/')
++fname;
*fname = '\0';
return ret;
}
/* Returns the filename part of a URL */
char *
fileURLFilename(char *fname, char *where, int max)
{
char *ret;
while (isspace(*fname))
++fname;
/* Don't ever call this on a bad URL! */
fname += strlen("ftp://");
/* Do we have a place to stick our work? */
if ((ret = where) != NULL) {
while (*fname && *fname != '/')
++fname;
if (*fname == '/') {
while (*fname && max--)
*where++ = *fname++;
}
*where = '\0';
return ret;
}
/* If not, they must really want us to stomp the original string */
while (*fname && *fname != '/')
++fname;
return fname;
}
/*
* Try and fetch a file by URL, returning the directory name for where
* it's unpacked, if successful.
*/
char *
fileGetURL(char *base, char *spec)
{
char host[MAXHOSTNAMELEN], file[FILENAME_MAX];
char *cp, *rp;
char fname[FILENAME_MAX];
char pen[FILENAME_MAX];
FILE *ftp;
pid_t tpid;
int i, status;
char *hint;
rp = NULL;
/* Special tip that sysinstall left for us */
hint = getenv("PKG_ADD_BASE");
if (!isURL(spec)) {
if (!base && !hint)
return NULL;
/* We've been given an existing URL (that's known-good) and now we need
to construct a composite one out of that and the basename we were
handed as a dependency. */
if (base) {
strcpy(fname, base);
/* Advance back two slashes to get to the root of the package hierarchy */
cp = strrchr(fname, '/');
if (cp) {
*cp = '\0'; /* chop name */
cp = strrchr(fname, '/');
}
if (cp) {
*(cp + 1) = '\0';
strcat(cp, "All/");
strcat(cp, spec);
strcat(cp, ".tgz");
}
else
return NULL;
}
else {
/* Otherwise, we've been given an environment variable hinting at the right location from sysinstall */
strcpy(fname, hint);
strcat(fname, spec);
}
}
else
strcpy(fname, spec);
cp = fileURLHost(fname, host, MAXHOSTNAMELEN);
if (!*cp) {
warnx("URL `%s' has bad host part!", fname);
return NULL;
}
cp = fileURLFilename(fname, file, FILENAME_MAX);
if (!*cp) {
warnx("URL `%s' has bad filename part!", fname);
return NULL;
}
if (Verbose)
printf("Trying to fetch %s.\n", fname);
ftp = ftpGetURL(fname, &status);
if (ftp) {
pen[0] = '\0';
if ((rp = make_playpen(pen, sizeof(pen), 0)) != NULL) {
rp=strdup(pen); /* be safe for nested calls */
if (Verbose)
printf("Extracting from FTP connection into %s\n", pen);
tpid = fork();
if (!tpid) {
dup2(fileno(ftp), 0);
i = execl("/usr/bin/tar", "tar", Verbose ? "-xzvf" : "-xzf", "-", 0);
exit(i);
}
else {
int pstat;
fclose(ftp);
tpid = waitpid(tpid, &pstat, 0);
if (Verbose)
printf("tar command returns %d status\n", WEXITSTATUS(pstat));
}
}
else
printf("Error: Unable to construct a new playpen for FTP!\n");
fclose(ftp);
}
else
printf("Error: FTP Unable to get %s: %s\n",
fname,
status ? "Error while performing FTP" :
hstrerror(h_errno));
return rp;
}
char *
fileFindByPath(char *base, char *fname)
{
static char tmp[FILENAME_MAX];
char *cp;
if (ispkgpattern(fname)) {
if ((cp=findbestmatchingname(".",fname)) != NULL) {
strcpy (tmp, cp);
return tmp;
}
}else{
if (fexists(fname) && isfile(fname)) {
strcpy(tmp, fname);
return tmp;
}
}
if (base) {
strcpy(tmp, base);
cp = strrchr(tmp, '/');
if (cp) {
*cp = '\0'; /* chop name */
cp = strrchr(tmp, '/');
}
if (cp) {
*(cp + 1) = '\0';
strcat(cp, "All/");
strcat(cp, fname);
strcat(cp, ".tgz");
if (ispkgpattern(tmp)) {
cp=findbestmatchingname(dirname_of(tmp), basename_of(tmp));
if (cp) {
char *s;
s=strrchr(tmp,'/');
assert(s != NULL);
strcpy(s+1, cp);
return tmp;
}
} else {
if (fexists(tmp)) {
return tmp;
}
}
}
}
cp = getenv("PKG_PATH");
while (cp) {
char *cp2 = strsep(&cp, ":");
snprintf(tmp, FILENAME_MAX, "%s/%s.tgz", cp2 ? cp2 : cp, fname);
if (ispkgpattern(tmp)) {
char *s;
s = findbestmatchingname(dirname_of(tmp), basename_of(tmp));
if (s){
char *t;
t=strrchr(tmp, '/');
strcpy(t+1, s);
return tmp;
}
}else{
if (fexists(tmp) && isfile(tmp)) {
return tmp;
}
}
}
return NULL;
}
char *
fileGetContents(char *fname)
{
char *contents;
struct stat sb;
int fd;
if (stat(fname, &sb) == FAIL) {
cleanup(0);
errx(2, "can't stat '%s'", fname);
}
contents = (char *)malloc((size_t)(sb.st_size) + 1);
fd = open(fname, O_RDONLY, 0);
if (fd == FAIL) {
cleanup(0);
errx(2, "unable to open '%s' for reading", fname);
}
if (read(fd, contents, (size_t) sb.st_size) != (size_t) sb.st_size) {
cleanup(0);
errx(2, "short read on '%s' - did not get %qd bytes",
fname, (long long)sb.st_size);
}
close(fd);
contents[(size_t)sb.st_size] = '\0';
return contents;
}
/* Takes a filename and package name, returning (in "try") the canonical "preserve"
* name for it.
*/
Boolean
make_preserve_name(char *try, size_t max, char *name, char *file)
{
int len, i;
if ((len = strlen(file)) == 0)
return FALSE;
else
i = len - 1;
strncpy(try, file, max);
if (try[i] == '/') /* Catch trailing slash early and save checking in the loop */
--i;
for (; i; i--) {
if (try[i] == '/') {
try[i + 1]= '.';
strncpy(&try[i + 2], &file[i + 1], max - i - 2);
break;
}
}
if (!i) {
try[0] = '.';
strncpy(try + 1, file, max - 1);
}
/* I should probably be called rude names for these inline assignments */
strncat(try, ".", max -= strlen(try));
strncat(try, name, max -= strlen(name));
strncat(try, ".", max--);
strncat(try, "backup", max -= 6);
return TRUE;
}
/* Write the contents of "str" to a file */
void
write_file(char *name, char *str)
{
size_t len;
FILE *fp;
if ((fp = fopen(name, "w")) == (FILE *) NULL) {
cleanup(0);
errx(2, "cannot fopen '%s' for writing", name);
}
len = strlen(str);
if (fwrite(str, 1, len, fp) != len) {
cleanup(0);
errx(2, "short fwrite on '%s', tried to write %ld bytes",
name, (long) len);
}
if (fclose(fp)) {
cleanup(0);
errx(2, "failure to fclose '%s'", name);
}
}
void
copy_file(char *dir, char *fname, char *to)
{
char cmd[FILENAME_MAX];
if (fname[0] == '/')
snprintf(cmd, FILENAME_MAX, "cp -p -r %s %s", fname, to);
else
snprintf(cmd, FILENAME_MAX, "cp -p -r %s/%s %s", dir, fname, to);
if (vsystem(cmd)) {
cleanup(0);
errx(2, "could not perform '%s'", cmd);
}
}
void
move_file(char *dir, char *fname, char *to)
{
char cmd[FILENAME_MAX];
if (fname[0] == '/')
snprintf(cmd, FILENAME_MAX, "mv %s %s", fname, to);
else
snprintf(cmd, FILENAME_MAX, "mv %s/%s %s", dir, fname, to);
if (vsystem(cmd)) {
cleanup(0);
errx(2, "could not perform '%s'", cmd);
}
}
/*
* 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 = "/";
snprintf(cmd, FILENAME_MAX * 3, "tar cf - -C %s %s | tar xpf -",
dir, fname);
}
else
snprintf(cmd, FILENAME_MAX * 3, "tar cf - %s | tar xpf - -C %s",
fname, dir);
#ifdef DEBUG
printf("Using '%s' to copy trees.\n", cmd);
#endif
if (system(cmd)) {
cleanup(0);
errx(2, "copy_file: could not perform '%s'", cmd);
}
}
/* Unpack a tar file */
int
unpack(char *pkg, char *flist)
{
char args[10], suff[80], *cp;
args[0] = '\0';
/*
* Figure out by a crude heuristic whether this or not this is probably
* compressed.
*/
if (strcmp(pkg, "-")) {
cp = strrchr(pkg, '.');
if (cp) {
strcpy(suff, cp + 1);
if (strchr(suff, 'z') || strchr(suff, 'Z'))
strcpy(args, "-z");
}
}
else
strcpy(args, "z");
strcat(args, "xpf");
if (vsystem("tar %s %s %s", args, pkg, flist ? flist : "")) {
warnx("tar extract of %s failed!", pkg);
return 1;
}
return 0;
}
/*
* Using fmt, replace all instances of:
*
* %F With the parameter "name"
* %D With the parameter "dir"
* %B Return the directory part ("base") of %D/%F
* %f Return the filename part of %D/%F
*
* Check that no overflows can occur.
*/
void
format_cmd(char *buf, size_t size, char *fmt, char *dir, char *name)
{
char scratch[FILENAME_MAX * 2];
char *bufp;
char *cp;
for (bufp = buf ; (int)(bufp - buf) < size && *fmt ; ) {
if (*fmt == '%') {
switch (*++fmt) {
case 'F':
strnncpy(bufp, size - (int)(bufp - buf), name, strlen(name));
bufp += strlen(bufp);
break;
case 'D':
strnncpy(bufp, size - (int)(bufp - buf), dir, strlen(dir));
bufp += strlen(bufp);
break;
case 'B':
(void) snprintf(scratch, sizeof(scratch), "%s/%s", dir, name);
if ((cp = strrchr(scratch, '/')) == (char *) NULL) {
cp = scratch;
}
strnncpy(bufp, size - (int)(bufp - buf), scratch, (size_t)(cp - scratch));
bufp += strlen(bufp);
break;
case 'f':
(void) snprintf(scratch, sizeof(scratch), "%s/%s", dir, name);
if ((cp = strrchr(scratch, '/')) == (char *) NULL) {
cp = scratch;
} else {
cp++;
}
strnncpy(bufp, size - (int)(bufp - buf), cp, strlen(cp));
bufp += strlen(bufp);
break;
default:
*bufp++ = *fmt;
break;
}
++fmt;
} else {
*bufp++ = *fmt++;
}
}
*bufp = '\0';
}
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