FreeCalypso > hg > freecalypso-tools
view rvinterf/etmsync/cleandir.c @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | e6fe9d25377a |
children |
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/* * The implementation of cleandir and rm-subtree commands lives here. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include "etm.h" #include "ffs.h" #include "tmffs2.h" #include "limits.h" #include "ffslimits.h" #include "localtypes.h" #include "localstruct.h" #include "exitcodes.h" extern char *pathname_for_ffs_child(); cleandir_level(ffspath_dir) char *ffspath_dir; { u_char rdstate[4]; char rdbuf[MAX_FN_COMPONENT+1], ffspath_child[MAX_FULL_PATHNAME+1]; char *childp; int nument, i, rc; struct stat_info stat; rc = do_opendir(ffspath_dir, rdstate, &nument); if (rc) return(rc); if (!nument) return(0); childp = pathname_for_ffs_child(ffspath_dir, ffspath_child); if (!childp) { printf("error: non-empty dir at the limit of pathname depth\n"); return(ERROR_TARGET); } for (i = 0; i < nument; i++) { rc = do_readdir(rdstate, rdbuf, MAX_FN_COMPONENT+1); if (rc) return(rc); if (index(rdbuf, '/')) { printf("error: readdir result contains a slash\n"); return(ERROR_TARGET); } strcpy(childp, rdbuf); rc = do_xlstat(ffspath_child, &stat); if (rc) { printf("xlstat failed on %s\n", ffspath_child); return(rc); } if (stat.type == OT_DIR) { rc = cleandir_level(ffspath_child); if (rc) return(rc); } rc = do_ffs_remove(ffspath_child, 0); if (rc) return(rc); } return(0); } cmd_cleandir(argc, argv) char **argv; { int rc; rc = validate_ffs_pathname(argv[1]); if (rc < 0) return(ERROR_USAGE); /* err msg already printed */ if (rc == 0) { fprintf(stderr, "error: cleandir / is not allowed\n"); return(ERROR_USAGE); } return cleandir_level(argv[1]); } cmd_rm_subtree(argc, argv) char **argv; { char *pathname; int rc, minusf_mode, found; struct stat_info stat; if (argc == 2) { pathname = argv[1]; minusf_mode = 0; } else { if (strcmp(argv[1], "-f")) { fprintf(stderr, "usage: rm-subtree [-f] ffs_pathname\n"); return(ERROR_USAGE); } pathname = argv[2]; minusf_mode = 1; } rc = validate_ffs_pathname(pathname); if (rc < 0) return(ERROR_USAGE); /* err msg already printed */ if (rc == 0) { fprintf(stderr, "error: rm-subtree / is not allowed\n"); return(ERROR_USAGE); } if (minusf_mode) { rc = do_xlstat_notfoundok(pathname, &found, &stat); if (rc) return(rc); if (!found) return(0); } else { rc = do_xlstat(pathname, &stat); if (rc) return(rc); } if (stat.type != OT_DIR) { printf("error: %s exists and is not a directory\n", pathname); return(ERROR_TARGET); } rc = cleandir_level(pathname); if (rc) return(rc); return do_ffs_remove(pathname, 0); }