diff options
Diffstat (limited to 'lib/librpc/secure_rpc/rpc/openchild.c')
| -rw-r--r-- | lib/librpc/secure_rpc/rpc/openchild.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/lib/librpc/secure_rpc/rpc/openchild.c b/lib/librpc/secure_rpc/rpc/openchild.c new file mode 100644 index 0000000..b30e615 --- /dev/null +++ b/lib/librpc/secure_rpc/rpc/openchild.c @@ -0,0 +1,133 @@ +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)openchild.c 2.3 88/08/15 4.0 RPCSRC; from 1.7 88/02/08 SMI"; +#endif +/* + * Sun RPC is a product of Sun Microsystems, Inc. and is provided for + * unrestricted use provided that this legend is included on all tape + * media and as a part of the software program in whole or part. Users + * may copy or modify Sun RPC without charge, but are not authorized + * to license or distribute it to anyone else except as part of a product or + * program developed by the user. + * + * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE + * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR + * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. + * + * Sun RPC is provided with no support and without any obligation on the + * part of Sun Microsystems, Inc. to assist in its use, correction, + * modification or enhancement. + * + * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE + * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC + * OR ANY PART THEREOF. + * + * In no event will Sun Microsystems, Inc. be liable for any lost revenue + * or profits or other special, indirect and consequential damages, even if + * Sun has been advised of the possibility of such damages. + * + * Sun Microsystems, Inc. + * 2550 Garcia Avenue + * Mountain View, California 94043 + */ + +/* + * Copyright (c) 1988 by Sun Microsystems, Inc. + */ + +/* + * Open two pipes to a child process, one for reading, one for writing. + * The pipes are accessed by FILE pointers. This is NOT a public + * interface, but for internal use only! + */ +#include <stdio.h> + +extern char *malloc(); +extern char *rindex(); +extern char *sprintf(); + +static char *basename(); +static char SHELL[] = "/bin/sh"; + + +/* + * returns pid, or -1 for failure + */ +_openchild(command, fto, ffrom) + char *command; + FILE **fto; + FILE **ffrom; +{ + int i; + int pid; + int pdto[2]; + int pdfrom[2]; + char *com; + + + if (pipe(pdto) < 0) { + goto error1; + } + if (pipe(pdfrom) < 0) { + goto error2; + } + switch (pid = vfork()) { + case -1: + goto error3; + + case 0: + /* + * child: read from pdto[0], write into pdfrom[1] + */ + (void) close(0); + (void) dup(pdto[0]); + (void) close(1); + (void) dup(pdfrom[1]); + for (i = _rpc_dtablesize() - 1; i >= 3; i--) { + (void) close(i); + } + com = malloc((unsigned) strlen(command) + 6); + if (com == NULL) { + _exit(~0); + } + (void) sprintf(com, "exec %s", command); + execl(SHELL, basename(SHELL), "-c", com, NULL); + _exit(~0); + + default: + /* + * parent: write into pdto[1], read from pdfrom[0] + */ + *fto = fdopen(pdto[1], "w"); + (void) close(pdto[0]); + *ffrom = fdopen(pdfrom[0], "r"); + (void) close(pdfrom[1]); + break; + } + return (pid); + + /* + * error cleanup and return + */ +error3: + (void) close(pdfrom[0]); + (void) close(pdfrom[1]); +error2: + (void) close(pdto[0]); + (void) close(pdto[1]); +error1: + return (-1); +} + +static char * +basename(path) + char *path; +{ + char *p; + + p = rindex(path, '/'); + if (p == NULL) { + return (path); + } else { + return (p + 1); + } +} |
