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/* dctrl-tools - Debian control file inspection tools
Copyright (C) 2004 Antti-Juhani Kaijanaho
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
#include "ifile.h"
#include "msg.h"
static int open_pipe(char const * s)
{
int ps[2];
int r = pipe(ps);
if (r == -1) {
errno_msg(L_IMPORTANT, 0);
return -1;
}
pid_t pid = fork();
switch (pid) {
case -1:
errno_msg(L_IMPORTANT, 0);
close(ps[0]);
close(ps[1]);
return -1;
case 0:
// child
close(STDIN_FILENO);
r = dup2(ps[1], STDOUT_FILENO);
if (r == -1) {
fprintf(stderr, "%s (child): %s\n",
get_progname(), strerror(errno));
_exit(1);
}
close(ps[0]);
close(ps[1]);
execl("/bin/sh", "/bin/sh", "-c", s, 0);
fprintf(stderr, _("%s (child): failed to exec /bin/sh: %s\n"),
get_progname(), strerror(errno));
_exit(1);
}
// parent
close(ps[1]);
return ps[0];
}
int open_ifile(struct ifile f)
{
switch (f.mode) {
case m_read:
if (strcmp(f.s, "-") == 0) {
return STDIN_FILENO;
}
{
int fd = open(f.s, O_RDONLY);
if (fd == -1) {
fprintf(stderr, "%s: %s: %s\n",
get_progname(), f.s, strerror(errno));
record_error();
return -1;
}
return fd;
}
case m_exec:
return open_pipe(f.s);
case m_error:
abort();
}
abort();
}
void close_ifile(struct ifile f, int fd)
{
close(fd);
if (f.mode == m_exec) {
int status;
int r = wait(&status);
if (r == -1) {
errno_msg(L_IMPORTANT, f.s);
return;
}
if (WIFEXITED(status)) {
if (WEXITSTATUS(status) == 0) return;
fprintf(stderr, _("%s: command (%s) failed "
"(exit status %d)\n"),
get_progname(),
f.s,
WEXITSTATUS(status));
record_error();
return;
}
if (WIFSIGNALED(status)) {
fprintf(stderr, _("%s: command (%s) was killed "
"by signal %d\n"),
get_progname(),
f.s,
WTERMSIG(status));
record_error();
return;
}
}
}
bool chk_ifile(struct ifile fname, int fd)
{
struct stat stat;
int r = fstat(fd, &stat);
mode_t m = stat.st_mode;
if (r == -1) {
if (do_msg(L_IMPORTANT)) {
fprintf(stderr, _("%s: %s: cannot stat: %s\n"),
get_progname(), fname.s, strerror(errno));
}
record_error();
close_ifile(fname, fd);
return 0;
}
if (!(S_ISREG(m) || S_ISCHR(m) || S_ISFIFO(m))) {
if (do_msg(L_IMPORTANT)) {
fprintf(stderr, "%s: %s: %s\n",
get_progname(), fname.s,
S_ISDIR(m) ? _("is a directory, skipping") :
S_ISBLK(m) ? _("is a block device, skipping") :
S_ISLNK(m) ? _("internal error") :
S_ISSOCK(m) ? _("is a socket, skipping") :
_("unknown file type, skipping"));
}
record_error();
close_ifile(fname, fd);
return 0;
}
return 1;
}
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