2 * Copyright (c) 1988, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software written by Ken Arnold and
6 * published in UNIX Review, Vol. 6, No. 8.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 #include <sys/types.h>
44 #ifdef TIME_WITH_SYS_TIME
47 #elif defined(HAVE_SYS_TIME_H)
52 #ifdef HAVE_SYS_RESOURCE_H
53 #include <sys/resource.h>
70 * Special version of popen which avoids call to shell. This ensures
71 * no one may create a pipe to a hidden program as a side effect of a
72 * list or dir command.
79 /* return path prepended with ~ftp if that file exists, otherwise
80 * return path unchanged
84 ftp_rooted(const char *path
)
86 static char home
[MaxPathLen
] = "";
87 static char newpath
[MaxPathLen
];
91 if((pwd
= k_getpwnam("ftp")))
92 strcpy(home
, pwd
->pw_dir
);
93 snprintf(newpath
, sizeof(newpath
), "%s/%s", home
, path
);
94 if(access(newpath
, X_OK
))
95 strcpy(newpath
, path
);
101 ftpd_popen(char *program
, char *type
, int do_stderr
, int no_glob
)
105 int argc
, gargc
, pdes
[2], pid
;
106 char **pop
, *argv
[100], *gargv
[1000];
109 if (strcmp(type
, "r") && strcmp(type
, "w"))
114 /* This function is ugly and should be rewritten, in
115 * modern unices there is no such thing as a maximum
119 fds
= getdtablesize();
120 pids
= (int*)calloc(fds
, sizeof(int));
127 /* break up string into pieces */
129 for (argc
= 0, cp
= program
;; cp
= NULL
) {
130 if (!(argv
[argc
++] = strtok_r(cp
, " \t\n", &foo
)))
134 gargv
[0] = (char*)ftp_rooted(argv
[0]);
135 /* glob each piece */
136 for (gargc
= argc
= 1; argv
[argc
]; argc
++) {
138 int flags
= GLOB_BRACE
|GLOB_NOCHECK
|GLOB_QUOTE
|GLOB_TILDE
;
140 memset(&gl
, 0, sizeof(gl
));
141 if (no_glob
|| glob(argv
[argc
], flags
, NULL
, &gl
))
142 gargv
[gargc
++] = strdup(argv
[argc
]);
144 for (pop
= gl
.gl_pathv
; *pop
; pop
++)
145 gargv
[gargc
++] = strdup(*pop
);
151 switch(pid
= fork()) {
159 if (pdes
[1] != STDOUT_FILENO
) {
160 dup2(pdes
[1], STDOUT_FILENO
);
164 dup2(STDOUT_FILENO
, STDERR_FILENO
);
167 if (pdes
[0] != STDIN_FILENO
) {
168 dup2(pdes
[0], STDIN_FILENO
);
173 execv(gargv
[0], gargv
);
175 execv(gargv
[0], gargv
);
178 /* parent; assume fdopen can't fail... */
180 iop
= fdopen(pdes
[0], type
);
183 iop
= fdopen(pdes
[1], type
);
186 pids
[fileno(iop
)] = pid
;
189 for (argc
= 1; gargv
[argc
] != NULL
; argc
++)
197 ftpd_pclose(FILE *iop
)
201 sigset_t sigset
, osigset
;
204 * pclose returns -1 if stream is not associated with a
205 * `popened' command, or, if already `pclosed'.
207 if (pids
== 0 || pids
[fdes
= fileno(iop
)] == 0)
210 sigemptyset(&sigset
);
211 sigaddset(&sigset
, SIGINT
);
212 sigaddset(&sigset
, SIGQUIT
);
213 sigaddset(&sigset
, SIGHUP
);
214 sigprocmask(SIG_BLOCK
, &sigset
, &osigset
);
215 while ((pid
= waitpid(pids
[fdes
], &status
, 0)) < 0 && errno
== EINTR
)
217 sigprocmask(SIG_SETMASK
, &osigset
, NULL
);
221 if (WIFEXITED(status
))
222 return (WEXITSTATUS(status
));