=================================================================== RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/ssh/scp.c,v retrieving revision 1.119.2.1 retrieving revision 1.119.2.2 diff -u -r1.119.2.1 -r1.119.2.2 --- src/usr.bin/ssh/scp.c 2005/09/04 18:40:03 1.119.2.1 +++ src/usr.bin/ssh/scp.c 2006/02/03 02:53:44 1.119.2.2 @@ -71,7 +71,7 @@ */ #include "includes.h" -RCSID("$OpenBSD: scp.c,v 1.119.2.1 2005/09/04 18:40:03 brad Exp $"); +RCSID("$OpenBSD: scp.c,v 1.119.2.2 2006/02/03 02:53:44 brad Exp $"); #include "xmalloc.h" #include "atomicio.h" @@ -118,6 +118,48 @@ exit(1); } +static int +do_local_cmd(arglist *a) +{ + u_int i; + int status; + pid_t pid; + + if (a->num == 0) + fatal("do_local_cmd: no arguments"); + + if (verbose_mode) { + fprintf(stderr, "Executing:"); + for (i = 0; i < a->num; i++) + fprintf(stderr, " %s", a->list[i]); + fprintf(stderr, "\n"); + } + if ((pid = fork()) == -1) + fatal("do_local_cmd: fork: %s", strerror(errno)); + + if (pid == 0) { + execvp(a->list[0], a->list); + perror(a->list[0]); + exit(1); + } + + do_cmd_pid = pid; + signal(SIGTERM, killchild); + signal(SIGINT, killchild); + signal(SIGHUP, killchild); + + while (waitpid(pid, &status, 0) == -1) + if (errno != EINTR) + fatal("do_local_cmd: waitpid: %s", strerror(errno)); + + do_cmd_pid = -1; + + if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) + return (-1); + + return (0); +} + /* * This function executes the given command as the specified user on the * given host. This returns < 0 if execution fails, and >= 0 otherwise. This @@ -162,7 +204,7 @@ close(pin[0]); close(pout[1]); - args.list[0] = ssh_program; + replacearg(&args, 0, "%s", ssh_program); if (remuser != NULL) addargs(&args, "-l%s", remuser); addargs(&args, "%s", host); @@ -222,10 +264,15 @@ extern char *optarg; extern int optind; + /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */ + sanitise_stdfd(); + + memset(&args, '\0', sizeof(args)); args.list = NULL; - addargs(&args, "ssh"); /* overwritten with ssh_program */ + addargs(&args, "%s", ssh_program); addargs(&args, "-x"); addargs(&args, "-oForwardAgent no"); + addargs(&args, "-oPermitLocalCommand no"); addargs(&args, "-oClearAllForwardings yes"); fflag = tflag = 0; @@ -331,9 +378,9 @@ if ((targ = colon(argv[argc - 1]))) /* Dest is remote host. */ toremote(targ, argc, argv); else { - tolocal(argc, argv); /* Dest is local host. */ if (targetshouldbedirectory) verifydir(argv[argc - 1]); + tolocal(argc, argv); /* Dest is local host. */ } /* * Finally check the exit status of the ssh process, if one was forked @@ -359,7 +406,11 @@ { int i, len; char *bp, *host, *src, *suser, *thost, *tuser, *arg; + arglist alist; + memset(&alist, '\0', sizeof(alist)); + alist.list = NULL; + *targ++ = 0; if (*targ == 0) targ = "."; @@ -376,56 +427,48 @@ tuser = NULL; } + if (tuser != NULL && !okname(tuser)) { + xfree(arg); + return; + } + for (i = 0; i < argc - 1; i++) { src = colon(argv[i]); if (src) { /* remote to remote */ - static char *ssh_options = - "-x -o'ClearAllForwardings yes'"; + freeargs(&alist); + addargs(&alist, "%s", ssh_program); + if (verbose_mode) + addargs(&alist, "-v"); + addargs(&alist, "-x"); + addargs(&alist, "-oClearAllForwardings yes"); + addargs(&alist, "-n"); + *src++ = 0; if (*src == 0) src = "."; host = strrchr(argv[i], '@'); - len = strlen(ssh_program) + strlen(argv[i]) + - strlen(src) + (tuser ? strlen(tuser) : 0) + - strlen(thost) + strlen(targ) + - strlen(ssh_options) + CMDNEEDS + 20; - bp = xmalloc(len); + if (host) { *host++ = 0; host = cleanhostname(host); suser = argv[i]; if (*suser == '\0') suser = pwd->pw_name; - else if (!okname(suser)) { - xfree(bp); + else if (!okname(suser)) continue; - } - if (tuser && !okname(tuser)) { - xfree(bp); - continue; - } - snprintf(bp, len, - "%s%s %s -n " - "-l %s %s %s %s '%s%s%s:%s'", - ssh_program, verbose_mode ? " -v" : "", - ssh_options, suser, host, cmd, src, - tuser ? tuser : "", tuser ? "@" : "", - thost, targ); + addargs(&alist, "-l"); + addargs(&alist, "%s", suser); } else { host = cleanhostname(argv[i]); - snprintf(bp, len, - "exec %s%s %s -n %s " - "%s %s '%s%s%s:%s'", - ssh_program, verbose_mode ? " -v" : "", - ssh_options, host, cmd, src, - tuser ? tuser : "", tuser ? "@" : "", - thost, targ); } - if (verbose_mode) - fprintf(stderr, "Executing: %s\n", bp); - if (system(bp) != 0) + addargs(&alist, "%s", host); + addargs(&alist, "%s", cmd); + addargs(&alist, "%s", src); + addargs(&alist, "%s%s%s:%s", + tuser ? tuser : "", tuser ? "@" : "", + thost, targ); + if (do_local_cmd(&alist) != 0) errs = 1; - (void) xfree(bp); } else { /* local to remote */ if (remin == -1) { len = strlen(targ) + CMDNEEDS + 20; @@ -449,20 +492,23 @@ { int i, len; char *bp, *host, *src, *suser; + arglist alist; + memset(&alist, '\0', sizeof(alist)); + alist.list = NULL; + for (i = 0; i < argc - 1; i++) { if (!(src = colon(argv[i]))) { /* Local to local. */ - len = strlen(_PATH_CP) + strlen(argv[i]) + - strlen(argv[argc - 1]) + 20; - bp = xmalloc(len); - (void) snprintf(bp, len, "exec %s%s%s %s %s", _PATH_CP, - iamrecursive ? " -r" : "", pflag ? " -p" : "", - argv[i], argv[argc - 1]); - if (verbose_mode) - fprintf(stderr, "Executing: %s\n", bp); - if (system(bp)) + freeargs(&alist); + addargs(&alist, "%s", _PATH_CP); + if (iamrecursive) + addargs(&alist, "-r"); + if (pflag) + addargs(&alist, "-p"); + addargs(&alist, "%s", argv[i]); + addargs(&alist, "%s", argv[argc-1]); + if (do_local_cmd(&alist)) ++errs; - (void) xfree(bp); continue; } *src++ = 0; @@ -563,7 +609,10 @@ if (response() < 0) goto next; if ((bp = allocbuf(&buffer, fd, 2048)) == NULL) { -next: (void) close(fd); +next: if (fd != -1) { + (void) close(fd); + fd = -1; + } continue; } if (showprogress) @@ -592,8 +641,11 @@ if (showprogress) stop_progress_meter(); - if (close(fd) < 0 && !haderr) - haderr = errno; + if (fd != -1) { + if (close(fd) < 0 && !haderr) + haderr = errno; + fd = -1; + } if (!haderr) (void) atomicio(vwrite, remout, "", 1); else