/* $NetBSD: getextattr.c,v 1.13 2022/04/07 19:33:38 andvar Exp $ */ /*- * Copyright (c) 2002, 2003 Networks Associates Technology, Inc. * Copyright (c) 2002 Poul-Henning Kamp. * Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson * All rights reserved. * * This software was developed for the FreeBSD Project by Poul-Henning * Kamp and Network Associates Laboratories, the Security Research Division * of Network Associates, Inc. under DARPA/SPAWAR contract N66001-01-C-8035 * ("CBOSS"), as part of the DARPA CHATS research program * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The names of the authors may not be used to endorse or promote * products derived from this software without specific prior written * permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 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. * * FreeBSD: src/usr.sbin/extattr/rmextattr.c,v 1.6 2003/06/05 04:30:00 rwatson Exp */ #include #include #include #include #include //#include #include #include #include #include #include #include #include //#include static enum { EADUNNO, EAGET, EASET, EARM, EALS } what = EADUNNO; __dead static void usage(void) { switch (what) { case EAGET: fprintf(stderr, "usage: %s [-fhq] [-s | -x | -v style] " "attrnamespace attrname filename ...\n", getprogname()); exit(1); case EASET: fprintf(stderr, "usage: %s [-fhnq] " "attrnamespace attrname attrvalue filename ...\n", getprogname()); fprintf(stderr, "usage: %s [-fhnq] -i attrvalue_file " "attrnamespace attrname filename ...\n", getprogname()); exit(1); case EARM: fprintf(stderr, "usage: %s [-fhq] " "attrnamespace attrname filename ...\n", getprogname()); exit(1); case EALS: fprintf(stderr, "usage: %s [-fhq] " "attrnamespace filename ...\n", getprogname()); exit(1); case EADUNNO: default: fprintf(stderr, "usage: (getextattr|lsextattr|rmextattr|setextattr)\n"); exit (1); } } static void mkbuf(char **buf, int *oldlen, int newlen) { if (*oldlen >= newlen) return; if (*buf != NULL) free(*buf); *buf = malloc(newlen); if (*buf == NULL) err(1, "malloc"); *oldlen = newlen; return; } static int parse_flag_vis(const char *opt) { if (strcmp(opt, "default") == 0) return 0; else if (strcmp(opt, "cstyle") == 0) return VIS_CSTYLE; else if (strcmp(opt, "octal") == 0) return VIS_OCTAL; else if (strcmp(opt, "httpstyle") == 0) return VIS_HTTPSTYLE; /* Convenient aliases */ else if (strcmp(opt, "vis") == 0) return 0; else if (strcmp(opt, "c") == 0) return VIS_CSTYLE; else if (strcmp(opt, "http") == 0) return VIS_HTTPSTYLE; else fprintf(stderr, "%s: invalid -s option \"%s\"", getprogname(), opt); return -1; } #define HEXDUMP_PRINT(x) ((uint8_t)x >= 32 && (uint8_t)x < 128) ? x : '.' static void hexdump(const char *addr, size_t len) { unsigned int i, j; for (i = 0; i < len; i += 16) { printf(" %03x ", i); for (j = 0; j < 16; j++) { if (i + j >= len) printf(" "); else printf("%02x ", addr[i + j] & 0xff); } printf(" "); for (j = 0; j < 16; j++) { if (i + j >= len) printf(" "); else printf("%c", HEXDUMP_PRINT(addr[i + j])); } printf("\n"); } } #undef HEXDUMP_PRINT int main(int argc, char *argv[]) { char *buf, *visbuf; const char *p; const char *options, *attrname; int buflen, visbuflen, ch, error, i, arg_counter, attrnamespace, minargc, val_len = 0; int flag_force = 0; int flag_nofollow = 0; int flag_null = 0; int flag_quiet = 0; int flag_vis = -1; int flag_hex = 0; char *filename = NULL; options = NULL; minargc = 0; visbuflen = buflen = 0; visbuf = buf = NULL; p = getprogname(); if (strcmp(p, "getextattr") == 0) { what = EAGET; options = "fhqsxv:"; minargc = 2; } else if (strcmp(p, "setextattr") == 0) { what = EASET; options = "fhnqi:"; minargc = 3; } else if (strcmp(p, "rmextattr") == 0) { what = EARM; options = "fhq"; minargc = 2; } else if (strcmp(p, "lsextattr") == 0) { what = EALS; options = "fhq"; minargc = 2; } else usage(); while ((ch = getopt(argc, argv, options)) != -1) { switch (ch) { case 'f': flag_force = 1; break; case 'h': flag_nofollow = 1; break; case 'n': flag_null = 1; break; case 'q': flag_quiet = 1; break; case 's': flag_vis = VIS_SAFE | VIS_WHITE; break; case 'v': flag_vis = parse_flag_vis(optarg); break; case 'x': flag_hex = 1; break; case 'i': filename = optarg; minargc--; break; default: usage(); } } argc -= optind; argv += optind; /* * Check for missing argument. */ if (argc < minargc) usage(); /* * Normal case "namespace attribute". */ error = extattr_string_to_namespace(argv[0], &attrnamespace); if (error == 0) { /* * Namespace was specified, so we need one more argument * for the attribute (except for listing) */ if ((what != EALS) && (argc < minargc + 1)) usage(); argc--; argv++; } else { /* * The namespace was not valid. Perhaps it was omitted. * Try to guess a missing namespace by using * linux layout "namespace.attribute". While * we are here, also test the Linux namespaces. */ if (strstr(argv[0], "user.") == argv[0]) { attrnamespace = EXTATTR_NAMESPACE_USER; } else if ((strstr(argv[0], "system.") == argv[0]) || (strstr(argv[0], "trusted.") == argv[0]) || (strstr(argv[0], "security.") == argv[0])) { attrnamespace = EXTATTR_NAMESPACE_SYSTEM; } else { err(1, "%s", argv[0]); } } if (what != EALS) { attrname = argv[0]; argc--; argv++; } else attrname = NULL; if (what == EASET) { /* * Handle -i option, reading value from a file. */ if (filename != NULL) { int fd; struct stat st; ssize_t readen, remain; if ((fd = open(filename, O_RDONLY, 0)) == -1) err(1, "%s: cannot open \"%s\"", getprogname(), filename); if (fstat(fd, &st) != 0) err(1, "%s: cannot stat \"%s\"", getprogname(), filename); val_len = st.st_size; mkbuf(&buf, &buflen, val_len); for (remain = val_len; remain > 0; remain -= readen) { if ((readen = read(fd, buf, remain)) == -1) err(1, "%s: cannot read \"%s\"", getprogname(), filename); } (void)close(fd); } else { val_len = strlen(argv[0]); mkbuf(&buf, &buflen, val_len + 1); strcpy(buf, argv[0]); /* safe */ argc--; argv++; } } for (arg_counter = 0; arg_counter < argc; arg_counter++) { switch (what) { case EARM: if (flag_nofollow) error = extattr_delete_link(argv[arg_counter], attrnamespace, attrname); else error = extattr_delete_file(argv[arg_counter], attrnamespace, attrname); if (error >= 0) continue; break; case EASET: if (flag_nofollow) error = extattr_set_link(argv[arg_counter], attrnamespace, attrname, buf, val_len + flag_null); else error = extattr_set_file(argv[arg_counter], attrnamespace, attrname, buf, val_len + flag_null); if (error >= 0) continue; break; case EALS: if (flag_nofollow) error = extattr_list_link(argv[arg_counter], attrnamespace, NULL, 0); else error = extattr_list_file(argv[arg_counter], attrnamespace, NULL, 0); if (error < 0) break; mkbuf(&buf, &buflen, error); if (flag_nofollow) error = extattr_list_link(argv[arg_counter], attrnamespace, buf, buflen); else error = extattr_list_file(argv[arg_counter], attrnamespace, buf, buflen); if (error < 0) break; if (!flag_quiet) printf("%s\t", argv[arg_counter]); for (i = 0; i < error; i += buf[i] + 1) printf("%s%*.*s", i ? "\t" : "", buf[i], buf[i], buf + i + 1); printf("\n"); continue; case EAGET: if (flag_nofollow) error = extattr_get_link(argv[arg_counter], attrnamespace, attrname, NULL, 0); else error = extattr_get_file(argv[arg_counter], attrnamespace, attrname, NULL, 0); if (error < 0) break; mkbuf(&buf, &buflen, error); if (flag_nofollow) error = extattr_get_link(argv[arg_counter], attrnamespace, attrname, buf, buflen); else error = extattr_get_file(argv[arg_counter], attrnamespace, attrname, buf, buflen); if (error < 0) break; if (!flag_quiet) printf("%s\t", argv[arg_counter]); /* * Check for binary string and terminal output */ #if 0 for (i = 0; i < error; i++) if (!isprint((int)buf[i])) err(1, "binary data, use -x flag"); #endif if (flag_vis != -1) { mkbuf(&visbuf, &visbuflen, error * 4 + 1); strvisx(visbuf, buf, error, flag_vis); printf("\"%s\"\n", visbuf); continue; } else if (flag_hex) { printf("\n"); hexdump(buf, error); continue; } else { fwrite(buf, error, 1, stdout); printf("\n"); continue; } default: break; } if (!flag_quiet) warn("%s: failed", argv[arg_counter]); if (flag_force) continue; return(1); } return (0); }