X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=bsd-user%2Fbsdload.c;h=5b3c061a452a6025eb0fe54f34d24a02ec4c8938;hb=1764ad70ce7c78b7f2f18bcf79cbab42a4e18b96;hp=6b52e087209859edb0c4e0cf1eeffd31fdfbf06b;hpb=052367ba8573809957f1abd288f79fbbda05a284;p=mirror_qemu.git diff --git a/bsd-user/bsdload.c b/bsd-user/bsdload.c index 6b52e08720..5b3c061a45 100644 --- a/bsd-user/bsdload.c +++ b/bsd-user/bsdload.c @@ -1,17 +1,24 @@ -/* Code for loading BSD executables. Mostly linux kernel code. */ - -#include -#include -#include -#include -#include -#include -#include +/* + * Load BSD executables. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see . + */ + +#include "qemu/osdep.h" #include "qemu.h" -#define TARGET_NGROUPS 32 - /* ??? This should really be somewhere else. */ abi_long memcpy_to_target(abi_ulong dest, const void *src, unsigned long len) @@ -19,68 +26,49 @@ abi_long memcpy_to_target(abi_ulong dest, const void *src, void *host_ptr; host_ptr = lock_user(VERIFY_WRITE, dest, len, 0); - if (!host_ptr) + if (!host_ptr) { return -TARGET_EFAULT; + } memcpy(host_ptr, src, len); unlock_user(host_ptr, dest, 1); return 0; } -static int in_group_p(gid_t g) -{ - /* return TRUE if we're in the specified group, FALSE otherwise */ - int ngroup; - int i; - gid_t grouplist[TARGET_NGROUPS]; - - ngroup = getgroups(TARGET_NGROUPS, grouplist); - for(i = 0; i < ngroup; i++) { - if(grouplist[i] == g) { - return 1; - } - } - return 0; -} - -static int count(char ** vec) +static int count(char **vec) { int i; - for(i = 0; *vec; i++) { + for (i = 0; *vec; i++) { vec++; } - return(i); + return i; } -static int prepare_binprm(struct linux_binprm *bprm) +static int prepare_binprm(struct bsd_binprm *bprm) { struct stat st; int mode; - int retval, id_change; + int retval; - if(fstat(bprm->fd, &st) < 0) { - return(-errno); + if (fstat(bprm->fd, &st) < 0) { + return -errno; } mode = st.st_mode; - if(!S_ISREG(mode)) { /* Must be regular file */ - return(-EACCES); + if (!S_ISREG(mode)) { /* Must be regular file */ + return -EACCES; } - if(!(mode & 0111)) { /* Must have at least one execute bit set */ - return(-EACCES); + if (!(mode & 0111)) { /* Must have at least one execute bit set */ + return -EACCES; } bprm->e_uid = geteuid(); bprm->e_gid = getegid(); - id_change = 0; /* Set-uid? */ - if(mode & S_ISUID) { + if (mode & S_ISUID) { bprm->e_uid = st.st_uid; - if(bprm->e_uid != geteuid()) { - id_change = 1; - } } /* Set-gid? */ @@ -91,29 +79,24 @@ static int prepare_binprm(struct linux_binprm *bprm) */ if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) { bprm->e_gid = st.st_gid; - if (!in_group_p(bprm->e_gid)) { - id_change = 1; - } } memset(bprm->buf, 0, sizeof(bprm->buf)); retval = lseek(bprm->fd, 0L, SEEK_SET); - if(retval >= 0) { + if (retval >= 0) { retval = read(bprm->fd, bprm->buf, 128); } - if(retval < 0) { + if (retval < 0) { perror("prepare_binprm"); exit(-1); - /* return(-errno); */ - } - else { - return(retval); + } else { + return retval; } } /* Construct the envp and argv tables on the target stack. */ abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, - abi_ulong stringp, int push_ptr) + abi_ulong stringp) { int n = sizeof(abi_ulong); abi_ulong envp; @@ -123,13 +106,6 @@ abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, envp = sp; sp -= (argc + 1) * n; argv = sp; - if (push_ptr) { - /* FIXME - handle put_user() failures */ - sp -= n; - put_user_ual(envp, sp); - sp -= n; - put_user_ual(argv, sp); - } sp -= n; /* FIXME - handle put_user() failures */ put_user_ual(argc, sp); @@ -154,49 +130,85 @@ abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp, return sp; } -int loader_exec(const char * filename, char ** argv, char ** envp, - struct target_pt_regs * regs, struct image_info *infop) +static bool is_there(const char *candidate) { - struct linux_binprm bprm; - int retval; - int i; + struct stat fin; - bprm.p = TARGET_PAGE_SIZE*MAX_ARG_PAGES-sizeof(unsigned int); - for (i=0 ; ip = TARGET_PAGE_SIZE * MAX_ARG_PAGES; + for (i = 0; i < MAX_ARG_PAGES; i++) { /* clear page-table */ + bprm->page[i] = NULL; + } + + if (strchr(filename, '/') != NULL) { + path = realpath(filename, fullpath); + if (path == NULL) { + /* Failed to resolve. */ + return -1; + } + if (!is_there(path)) { + return -1; + } + } else { + path = g_find_program_in_path(filename); + if (path == NULL) { + return -1; + } + } + + retval = open(path, O_RDONLY); + if (retval < 0) { + g_free(path); return retval; - bprm.fd = retval; - bprm.filename = (char *)filename; - bprm.argc = count(argv); - bprm.argv = argv; - bprm.envc = count(envp); - bprm.envp = envp; - - retval = prepare_binprm(&bprm); - - if(retval>=0) { - if (bprm.buf[0] == 0x7f - && bprm.buf[1] == 'E' - && bprm.buf[2] == 'L' - && bprm.buf[3] == 'F') { - retval = load_elf_binary(&bprm,regs,infop); + } + + bprm->fullpath = path; + bprm->fd = retval; + bprm->filename = (char *)filename; + bprm->argc = count(argv); + bprm->argv = argv; + bprm->envc = count(envp); + bprm->envp = envp; + + retval = prepare_binprm(bprm); + + if (retval >= 0) { + if (bprm->buf[0] == 0x7f + && bprm->buf[1] == 'E' + && bprm->buf[2] == 'L' + && bprm->buf[3] == 'F') { + retval = load_elf_binary(bprm, regs, infop); } else { - error_report("Unknown binary format"); + fprintf(stderr, "Unknown binary format\n"); return -1; } } - if(retval>=0) { + if (retval >= 0) { /* success. Initialize important registers */ do_init_thread(regs, infop); return retval; } /* Something went wrong, return the inode and free the argument pages*/ - for (i=0 ; ipage[i]); } - return(retval); + return retval; }