660 lines
14 KiB
C
660 lines
14 KiB
C
/* $NetBSD: file.c,v 1.32 1999/08/24 00:48:39 hubertf Exp $ */
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char *rcsid = "from FreeBSD Id: file.c,v 1.29 1997/10/08 07:47:54 charnier Exp";
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#else
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__RCSID("$NetBSD: file.c,v 1.32 1999/08/24 00:48:39 hubertf Exp $");
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#endif
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#endif
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/*
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* FreeBSD install - a package for the installation and maintainance
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* of non-core utilities.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Jordan K. Hubbard
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* 18 July 1993
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*
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* Miscellaneous file access utilities.
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*
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*/
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#include "lib.h"
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#include <sys/wait.h>
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#include <assert.h>
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#include <err.h>
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#include <netdb.h>
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#include <pwd.h>
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#include <time.h>
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#include <fcntl.h>
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/*
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* This is as ftpGetURL from FreeBSD's ftpio.c, except that it uses
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* NetBSD's ftp command to do all FTP, which will DTRT for proxies,
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* etc.
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*/
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static FILE *
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ftpGetURL(char *url, int *retcode)
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{
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FILE *ftp;
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pid_t pid_ftp;
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int p[2];
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*retcode = 0;
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if (pipe(p) < 0) {
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*retcode = 1;
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return NULL;
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}
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pid_ftp = fork();
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if (pid_ftp < 0) {
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*retcode = 1;
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return NULL;
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}
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if (pid_ftp == 0) {
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/* child */
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dup2(p[1], 1);
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close(p[1]);
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fprintf(stderr, ">>> ftp -o - %s\n", url);
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execl("/usr/bin/ftp", "ftp", "-V", "-o", "-", url, NULL);
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exit(1);
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} else {
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/* parent */
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ftp = fdopen(p[0], "r");
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close(p[1]);
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if (ftp == (FILE *) NULL) {
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*retcode = 1;
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return NULL;
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}
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}
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return ftp;
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}
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/*
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* Quick check to see if a file exists
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*/
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Boolean
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fexists(char *fname)
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{
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struct stat dummy;
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if (!lstat(fname, &dummy))
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return TRUE;
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return FALSE;
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}
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/*
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* Quick check to see if something is a directory
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*/
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Boolean
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isdir(char *fname)
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{
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struct stat sb;
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if (lstat(fname, &sb) != FAIL && S_ISDIR(sb.st_mode))
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return TRUE;
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else
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return FALSE;
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}
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/*
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* Check if something is a link to a directory
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*/
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Boolean
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islinktodir(char *fname)
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{
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struct stat sb;
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if (lstat(fname, &sb) != FAIL && S_ISLNK(sb.st_mode)) {
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if (stat(fname, &sb) != FAIL && S_ISDIR(sb.st_mode))
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return TRUE; /* link to dir! */
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else
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return FALSE; /* link to non-dir */
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} else
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return FALSE; /* non-link */
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}
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/*
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* Check to see if file is a dir, and is empty
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*/
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Boolean
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isemptydir(char *fname)
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{
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if (isdir(fname) || islinktodir(fname)) {
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DIR *dirp;
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struct dirent *dp;
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dirp = opendir(fname);
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if (!dirp)
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return FALSE; /* no perms, leave it alone */
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for (dp = readdir(dirp); dp != NULL; dp = readdir(dirp)) {
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if (strcmp(dp->d_name, ".") && strcmp(dp->d_name, "..")) {
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closedir(dirp);
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return FALSE;
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}
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}
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(void) closedir(dirp);
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return TRUE;
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}
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return FALSE;
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}
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/*
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* Check if something is a regular file
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*/
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Boolean
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isfile(char *fname)
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{
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struct stat sb;
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if (stat(fname, &sb) != FAIL && S_ISREG(sb.st_mode))
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return TRUE;
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return FALSE;
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}
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/*
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* Check to see if file is a file and is empty. If nonexistent or not
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* a file, say "it's empty", otherwise return TRUE if zero sized.
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*/
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Boolean
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isemptyfile(char *fname)
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{
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struct stat sb;
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if (stat(fname, &sb) != FAIL && S_ISREG(sb.st_mode)) {
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if (sb.st_size != 0)
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return FALSE;
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}
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return TRUE;
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}
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/* This struct defines the leading part of a valid URL name */
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typedef struct url_t {
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char *u_s; /* the leading part of the URL */
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int u_len; /* its length */
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} url_t;
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/* A table of valid leading strings for URLs */
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static url_t urls[] = {
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{"ftp://", 6},
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{"http://", 7},
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{NULL}
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};
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/*
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* Returns length of leading part of any URL from urls table, or -1
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*/
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int
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URLlength(char *fname)
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{
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url_t *up;
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int i;
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if (fname != (char *) NULL) {
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for (i = 0; isspace((unsigned char) *fname); i++) {
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fname++;
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}
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for (up = urls; up->u_s; up++) {
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if (strncmp(fname, up->u_s, up->u_len) == 0) {
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return i + up->u_len;
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}
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}
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}
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return -1;
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}
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/*
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* Returns the host part of a URL
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*/
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char *
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fileURLHost(char *fname, char *where, int max)
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{
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char *ret;
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int i;
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if ((i = URLlength(fname)) < 0) { /* invalid URL? */
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errx(1, "fileURLhost called with a bad URL: `%s'", fname);
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}
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fname += i;
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/* Do we have a place to stick our work? */
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if ((ret = where) != NULL) {
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while (*fname && *fname != '/' && max--)
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*where++ = *fname++;
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*where = '\0';
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return ret;
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}
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/* If not, they must really want us to stomp the original string */
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ret = fname;
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while (*fname && *fname != '/')
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++fname;
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*fname = '\0';
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return ret;
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}
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/*
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* Returns the filename part of a URL
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*/
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char *
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fileURLFilename(char *fname, char *where, int max)
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{
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char *ret;
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int i;
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if ((i = URLlength(fname)) < 0) { /* invalid URL? */
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errx(1, "fileURLhost called with a bad URL: `%s'", fname);
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}
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fname += i;
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/* Do we have a place to stick our work? */
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if ((ret = where) != NULL) {
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while (*fname && *fname != '/')
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++fname;
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if (*fname == '/') {
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while (*fname && max--)
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*where++ = *fname++;
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}
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*where = '\0';
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return ret;
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}
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/* If not, they must really want us to stomp the original string */
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while (*fname && *fname != '/')
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++fname;
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return fname;
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}
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/*
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* Try and fetch a file by URL, returning the directory name for where
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* it's unpacked, if successful.
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*/
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char *
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fileGetURL(char *base, char *spec)
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{
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char host[MAXHOSTNAMELEN], file[FILENAME_MAX];
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char *cp, *rp;
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char fname[FILENAME_MAX];
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char pen[FILENAME_MAX];
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FILE *ftp;
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pid_t tpid;
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int i, status;
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char *hint;
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rp = NULL;
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/* Special tip that sysinstall left for us */
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hint = getenv("PKG_ADD_BASE");
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if (!IS_URL(spec)) {
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if (!base && !hint)
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return NULL;
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/* We've been given an existing URL (that's known-good) and
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* now we need to construct a composite one out of that and
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* the basename we were handed as a dependency. */
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if (base) {
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strcpy(fname, base);
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/* Advance back two slashes to get to the root of the package hierarchy */
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cp = strrchr(fname, '/');
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if (cp) {
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*cp = '\0'; /* chop name */
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cp = strrchr(fname, '/');
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}
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if (cp) {
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*(cp + 1) = '\0';
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strcat(cp, "All/");
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strcat(cp, spec);
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strcat(cp, ".tgz");
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} else
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return NULL;
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} else {
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/* Otherwise, we've been given an environment variable hinting at the right location from sysinstall */
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strcpy(fname, hint);
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strcat(fname, spec);
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}
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} else
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strcpy(fname, spec);
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cp = fileURLHost(fname, host, MAXHOSTNAMELEN);
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if (!*cp) {
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warnx("URL `%s' has bad host part!", fname);
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return NULL;
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}
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cp = fileURLFilename(fname, file, FILENAME_MAX);
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if (!*cp) {
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warnx("URL `%s' has bad filename part!", fname);
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return NULL;
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}
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if (Verbose)
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printf("Trying to fetch %s.\n", fname);
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ftp = ftpGetURL(fname, &status);
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if (ftp) {
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pen[0] = '\0';
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if ((rp = make_playpen(pen, sizeof(pen), 0)) != NULL) {
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rp = strdup(pen); /* be safe for nested calls */
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if (Verbose)
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printf("Extracting from FTP connection into %s\n", pen);
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tpid = fork();
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if (!tpid) {
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dup2(fileno(ftp), 0);
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i = execl(TAR_FULLPATHNAME, TAR_CMD, Verbose ? "-xzvf" : "-xzf", "-", 0);
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err(i, TAR_FULLPATHNAME " failed");
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} else {
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int pstat;
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fclose(ftp);
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tpid = waitpid(tpid, &pstat, 0);
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if (Verbose)
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printf("%s command returns %d status\n", TAR_CMD, WEXITSTATUS(pstat));
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}
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} else
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printf("Error: Unable to construct a new playpen for FTP!\n");
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fclose(ftp);
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} else
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printf("Error: FTP Unable to get %s: %s\n",
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fname,
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status ? "Error while performing FTP" :
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hstrerror(h_errno));
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return rp;
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}
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/*
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* Look for filename/pattern "fname" in
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* - current dir, and if not found there, look
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* - $base/../All
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* - all dirs in $PKG_PATH
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*/
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char *
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fileFindByPath(char *base, char *fname)
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{
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static char tmp[FILENAME_MAX];
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char *cp;
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if (ispkgpattern(fname)) {
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if ((cp = findbestmatchingname(".", fname)) != NULL) {
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strcpy(tmp, cp);
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return tmp;
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}
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} else {
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if (fexists(fname) && isfile(fname)) {
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strcpy(tmp, fname);
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return tmp;
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}
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}
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if (base) {
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strcpy(tmp, base);
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cp = strrchr(tmp, '/');
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if (cp) {
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*cp = '\0'; /* chop name */
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cp = strrchr(tmp, '/');
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}
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if (cp) {
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*(cp + 1) = '\0';
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strcat(cp, "All/");
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strcat(cp, fname);
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strcat(cp, ".tgz");
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if (ispkgpattern(tmp)) {
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cp = findbestmatchingname(dirname_of(tmp), basename_of(tmp));
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if (cp) {
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char *s;
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s = strrchr(tmp, '/');
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assert(s != NULL);
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strcpy(s + 1, cp);
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return tmp;
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}
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} else {
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if (fexists(tmp)) {
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return tmp;
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}
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}
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}
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}
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cp = getenv("PKG_PATH");
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while (cp) {
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char *cp2 = strsep(&cp, ":");
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(void) snprintf(tmp, sizeof(tmp), "%s/%s.tgz", cp2 ? cp2 : cp, fname);
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if (ispkgpattern(tmp)) {
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char *s;
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s = findbestmatchingname(dirname_of(tmp), basename_of(tmp));
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if (s) {
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char *t;
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t = strrchr(tmp, '/');
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strcpy(t + 1, s);
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return tmp;
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}
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} else {
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if (fexists(tmp) && isfile(tmp)) {
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return tmp;
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}
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}
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}
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return NULL;
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}
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/*
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* Expect "fname" to point at a +CONTENTS file, and read it into
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* the buffer returned.
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*/
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char *
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fileGetContents(char *fname)
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{
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char *contents;
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struct stat sb;
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int fd;
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if (stat(fname, &sb) == FAIL) {
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cleanup(0);
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errx(2, "can't stat '%s'", fname);
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}
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contents = (char *) malloc((size_t) (sb.st_size) + 1);
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fd = open(fname, O_RDONLY, 0);
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if (fd == FAIL) {
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cleanup(0);
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errx(2, "unable to open '%s' for reading", fname);
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}
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if (read(fd, contents, (size_t) sb.st_size) != (size_t) sb.st_size) {
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cleanup(0);
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errx(2, "short read on '%s' - did not get %qd bytes",
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fname, (long long) sb.st_size);
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}
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close(fd);
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contents[(size_t) sb.st_size] = '\0';
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return contents;
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}
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/*
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* Takes a filename and package name, returning (in "try") the canonical
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* "preserve" name for it.
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*/
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Boolean
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make_preserve_name(char *try, size_t max, char *name, char *file)
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{
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int len, i;
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if ((len = strlen(file)) == 0)
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return FALSE;
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else
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i = len - 1;
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strncpy(try, file, max);
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if (try[i] == '/') /* Catch trailing slash early and save checking in the loop */
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--i;
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for (; i; i--) {
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if (try[i] == '/') {
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try[i + 1] = '.';
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strncpy(&try[i + 2], &file[i + 1], max - i - 2);
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break;
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}
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}
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if (!i) {
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try[0] = '.';
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strncpy(try + 1, file, max - 1);
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}
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/* I should probably be called rude names for these inline assignments */
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strncat(try, ".", max -= strlen(try));
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strncat(try, name, max -= strlen(name));
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strncat(try, ".", max--);
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strncat(try, "backup", max -= 6);
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return TRUE;
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}
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/*
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* Write the contents of "str" to a file
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*/
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void
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write_file(char *name, char *str)
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{
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size_t len;
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FILE *fp;
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if ((fp = fopen(name, "w")) == (FILE *) NULL) {
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cleanup(0);
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errx(2, "cannot fopen '%s' for writing", name);
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}
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len = strlen(str);
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if (fwrite(str, 1, len, fp) != len) {
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cleanup(0);
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errx(2, "short fwrite on '%s', tried to write %ld bytes",
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name, (long) len);
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}
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if (fclose(fp)) {
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cleanup(0);
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errx(2, "failure to fclose '%s'", name);
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}
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}
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void
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copy_file(char *dir, char *fname, char *to)
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{
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char cmd[FILENAME_MAX];
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if (fname[0] == '/')
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(void) snprintf(cmd, sizeof(cmd), "cp -p -r %s %s", fname, to);
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else
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(void) snprintf(cmd, sizeof(cmd), "cp -p -r %s/%s %s", dir, fname, to);
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if (vsystem(cmd)) {
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cleanup(0);
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errx(2, "could not perform '%s'", cmd);
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}
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}
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void
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move_file(char *dir, char *fname, char *to)
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{
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char cmd[FILENAME_MAX];
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if (fname[0] == '/')
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(void) snprintf(cmd, sizeof(cmd), "mv %s %s", fname, to);
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else
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(void) snprintf(cmd, sizeof(cmd), "mv %s/%s %s", dir, fname, to);
|
|
if (vsystem(cmd)) {
|
|
cleanup(0);
|
|
errx(2, "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("%s %s %s %s", TAR_CMD, args, pkg, flist ? flist : "")) {
|
|
warnx("%s extract of %s failed!", TAR_CMD, 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';
|
|
}
|