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/*-
* Copyright 1997 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: file.c,v 1.4 1998/09/17 00:15:15 des Exp $
*/
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include "fetch.h"
static int file_retrieve(struct fetch_state *fs);
static int file_close(struct fetch_state *fs);
static int file_parse(struct fetch_state *fs, const char *uri);
struct uri_scheme file_scheme =
{ "file", file_parse, 0, 0, 0 };
/*
* Again, we slightly misinterpret the slash after the hostname as
* being the start of the pathname rather than merely a separator.
*/
static int
file_parse(struct fetch_state *fs, const char *uri)
{
const char *p;
p = uri + 5; /* skip past `file:' */
if (p[0] == '/' && p[1] == '/') {
/* skip past `//localhost', if any */
p += 2;
while (*p && *p != '/')
p++;
}
if (p[0] != '/') {
warnx("`%s': expected absolute pathname in `file' URL", uri);
return EX_USAGE;
}
fs->fs_proto = percent_decode(p);
/* guaranteed to succeed because of above test */
p = strrchr(fs->fs_proto, '/');
if (fs->fs_outputfile == 0) /* only set if not overridden by user */
fs->fs_outputfile = p + 1;
fs->fs_retrieve = file_retrieve;
fs->fs_close = file_close;
return 0;
}
static int
file_close(struct fetch_state *fs)
{
free(fs->fs_proto);
fs->fs_proto = 0;
fs->fs_outputfile = 0;
fs->fs_status = "free";
return 0;
}
static int
file_retrieve(struct fetch_state *fs)
{
struct stat sb;
/* XXX - this seems bogus to me! */
if (access(fs->fs_outputfile, F_OK) == 0) {
errno = EEXIST;
warn("%s", fs->fs_outputfile);
return EX_USAGE;
}
if (fs->fs_linkfile) {
fs->fs_status = "checking path";
if (stat(fs->fs_proto, &sb) == -1) {
warn("%s", (char *)fs->fs_proto);
return EX_NOINPUT;
}
fs->fs_status = "symlink";
if (symlink(fs->fs_proto, fs->fs_outputfile) == -1) {
warn("symlink");
return EX_OSERR;
}
fs->fs_status = "done";
} else if (strcmp(fs->fs_outputfile, "-") == 0) {
FILE *f;
int ch;
if ((f = fopen(fs->fs_proto, "r")) == NULL) {
warn("fopen");
return EX_OSERR;
}
while ((ch = fgetc(f)) != EOF)
fputc(ch, stdout);
if (ferror(f)) {
warn("fgetc");
fclose(f);
return EX_OSERR;
}
fclose(f);
} else {
pid_t pid;
int status;
fflush(stderr);
pid = fork();
if (pid < 0) {
warn("fork");
return EX_TEMPFAIL;
} else if (pid == 0) {
execl(PATH_CP, "cp", "-p", fs->fs_proto,
fs->fs_outputfile, (char *)0);
warn("execl: " PATH_CP);
fflush(stderr);
_exit(EX_OSERR);
} else {
fs->fs_status = "copying";
if (waitpid(pid, &status, 0) < 0) {
warn("waitpid(%ld)", (long)pid);
return EX_OSERR;
}
if (WIFEXITED(status))
return WEXITSTATUS(status);
if (WIFSIGNALED(status))
warn(PATH_CP " exited on signal: %s",
sys_signame[WTERMSIG(status)]);
return EX_OSERR;
}
}
return 0;
}
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