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-rw-r--r--g10/exec.c617
1 files changed, 0 insertions, 617 deletions
diff --git a/g10/exec.c b/g10/exec.c
deleted file mode 100644
index f220dd30f..000000000
--- a/g10/exec.c
+++ /dev/null
@@ -1,617 +0,0 @@
-/* exec.c - generic call-a-program code
- * Copyright (C) 2001, 2002 Free Software Foundation, Inc.
- *
- * This file is part of GnuPG.
- *
- * GnuPG 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.
- *
- * GnuPG 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
- */
-
-#include <config.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#ifndef EXEC_TEMPFILE_ONLY
-#include <sys/wait.h>
-#endif
-#ifdef HAVE_DOSISH_SYSTEM
-#include <windows.h>
-#endif
-#include <fcntl.h>
-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include "options.h"
-#include "memory.h"
-#include "i18n.h"
-#include "iobuf.h"
-#include "util.h"
-#include "exec.h"
-
-#ifdef NO_EXEC
-int exec_write(struct exec_info **info,const char *program,
- const char *args_in,const char *name,int writeonly,int binary)
-{
- log_error(_("no remote program execution supported\n"));
- return G10ERR_GENERAL;
-}
-
-int exec_read(struct exec_info *info) { return G10ERR_GENERAL; }
-int exec_finish(struct exec_info *info) { return G10ERR_GENERAL; }
-int set_exec_path(const char *path,int method) { return G10ERR_GENERAL; }
-
-#else /* ! NO_EXEC */
-
-#ifndef HAVE_MKDTEMP
-char *mkdtemp(char *template);
-#endif
-
-#if defined (__MINGW32__) || defined (__CYGWIN32__)
-/* This is a nicer system() for windows that waits for programs to
- return before returning control to the caller. I hate helpful
- computers. */
-static int win_system(const char *command)
-{
- PROCESS_INFORMATION pi;
- STARTUPINFO si;
- char *string;
-
- /* We must use a copy of the command as CreateProcess modifies this
- argument. */
- string=m_strdup(command);
-
- memset(&pi,0,sizeof(pi));
- memset(&si,0,sizeof(si));
- si.cb=sizeof(si);
-
- if(!CreateProcess(NULL,string,NULL,NULL,FALSE,0,NULL,NULL,&si,&pi))
- return -1;
-
- /* Wait for the child to exit */
- WaitForSingleObject(pi.hProcess,INFINITE);
-
- CloseHandle(pi.hProcess);
- CloseHandle(pi.hThread);
- m_free(string);
-
- return 0;
-}
-#endif
-
-/* method==0 to replace current $PATH, and 1 to append to current
- $PATH. */
-int set_exec_path(const char *path,int method)
-{
- char *p,*curpath=NULL;
- size_t curlen=0;
-
- if(method==1 && (curpath=getenv("PATH")))
- curlen=strlen(curpath)+1;
-
- p=m_alloc(5+curlen+strlen(path)+1);
- strcpy(p,"PATH=");
-
- if(curpath)
- {
- strcat(p,curpath);
- strcat(p,":");
- }
-
- strcat(p,path);
-
- /* Notice that path is never freed. That is intentional due to the
- way putenv() works. This leaks a few bytes if we call
- set_exec_path multiple times. */
-
- if(putenv(p)!=0)
- return G10ERR_GENERAL;
- else
- return 0;
-}
-
-/* Makes a temp directory and filenames */
-static int make_tempdir(struct exec_info *info)
-{
- char *tmp=opt.temp_dir,*namein=info->name,*nameout;
-
- if(!namein)
- namein=info->binary?"tempin" EXTSEP_S "bin":"tempin" EXTSEP_S "txt";
-
- nameout=info->binary?"tempout" EXTSEP_S "bin":"tempout" EXTSEP_S "txt";
-
- /* Make up the temp dir and files in case we need them */
-
- if(tmp==NULL)
- {
-#if defined (__MINGW32__) || defined (__CYGWIN32__)
- tmp=m_alloc(256);
- if(GetTempPath(256,tmp)==0)
- strcpy(tmp,"c:\\windows\\temp");
- else
- {
- int len=strlen(tmp);
-
- /* GetTempPath may return with \ on the end */
- while(len>0 && tmp[len-1]=='\\')
- {
- tmp[len-1]='\0';
- len--;
- }
- }
-#else /* More unixish systems */
- tmp=getenv("TMPDIR");
- if(tmp==NULL)
- {
- tmp=getenv("TMP");
- if(tmp==NULL)
- {
-#ifdef __riscos__
- tmp="<Wimp$ScrapDir>.GnuPG";
- mkdir(tmp,0700); /* Error checks occur later on */
-#else
- tmp="/tmp";
-#endif
- }
- }
-#endif
- }
-
- info->tempdir=m_alloc(strlen(tmp)+strlen(DIRSEP_S)+10+1);
-
- sprintf(info->tempdir,"%s" DIRSEP_S "gpg-XXXXXX",tmp);
-
-#if defined (__MINGW32__) || defined (__CYGWIN32__)
- m_free(tmp);
-#endif
-
- if(mkdtemp(info->tempdir)==NULL)
- log_error(_("can't create directory `%s': %s\n"),
- info->tempdir,strerror(errno));
- else
- {
- info->madedir=1;
-
- info->tempfile_in=m_alloc(strlen(info->tempdir)+
- strlen(DIRSEP_S)+strlen(namein)+1);
- sprintf(info->tempfile_in,"%s" DIRSEP_S "%s",info->tempdir,namein);
-
- if(!info->writeonly)
- {
- info->tempfile_out=m_alloc(strlen(info->tempdir)+
- strlen(DIRSEP_S)+strlen(nameout)+1);
- sprintf(info->tempfile_out,"%s" DIRSEP_S "%s",info->tempdir,nameout);
- }
- }
-
- return info->madedir?0:G10ERR_GENERAL;
-}
-
-/* Expands %i and %o in the args to the full temp files within the
- temp directory. */
-static int expand_args(struct exec_info *info,const char *args_in)
-{
- const char *ch=args_in;
- unsigned int size,len;
-
- info->use_temp_files=0;
- info->keep_temp_files=0;
-
- if(DBG_EXTPROG)
- log_debug("expanding string \"%s\"\n",args_in);
-
- size=100;
- info->command=m_alloc(size);
- len=0;
- info->command[0]='\0';
-
- while(*ch!='\0')
- {
- if(*ch=='%')
- {
- char *append=NULL;
-
- ch++;
-
- switch(*ch)
- {
- case 'O':
- info->keep_temp_files=1;
- /* fall through */
-
- case 'o': /* out */
- if(!info->madedir)
- {
- if(make_tempdir(info))
- goto fail;
- }
- append=info->tempfile_out;
- info->use_temp_files=1;
- break;
-
- case 'I':
- info->keep_temp_files=1;
- /* fall through */
-
- case 'i': /* in */
- if(!info->madedir)
- {
- if(make_tempdir(info))
- goto fail;
- }
- append=info->tempfile_in;
- info->use_temp_files=1;
- break;
-
- case '%':
- append="%";
- break;
- }
-
- if(append)
- {
- size_t applen=strlen(append);
-
- if(applen+len>size-1)
- {
- if(applen<100)
- applen=100;
-
- size+=applen;
- info->command=m_realloc(info->command,size);
- }
-
- strcat(info->command,append);
- len+=strlen(append);
- }
- }
- else
- {
- if(len==size-1) /* leave room for the \0 */
- {
- size+=100;
- info->command=m_realloc(info->command,size);
- }
-
- info->command[len++]=*ch;
- info->command[len]='\0';
- }
-
- ch++;
- }
-
- if(DBG_EXTPROG)
- log_debug("args expanded to \"%s\", use %d, keep %d\n",
- info->command,info->use_temp_files,info->keep_temp_files);
-
- return 0;
-
- fail:
-
- m_free(info->command);
- info->command=NULL;
-
- return G10ERR_GENERAL;
-}
-
-/* Either handles the tempfile creation, or the fork/exec. If it
- returns ok, then info->tochild is a FILE * that can be written to.
- The rules are: if there are no args, then it's a fork/exec/pipe.
- If there are args, but no tempfiles, then it's a fork/exec/pipe via
- shell -c. If there are tempfiles, then it's a system. */
-
-int exec_write(struct exec_info **info,const char *program,
- const char *args_in,const char *name,int writeonly,int binary)
-{
- int ret=G10ERR_GENERAL;
-
- if(opt.exec_disable && !opt.no_perm_warn)
- {
- log_info(_("external program calls are disabled due to unsafe "
- "options file permissions\n"));
-
- return ret;
- }
-
-#if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
- /* There should be no way to get to this spot while still carrying
- setuid privs. Just in case, bomb out if we are. */
- if(getuid()!=geteuid())
- BUG();
-#endif
-
- if(program==NULL && args_in==NULL)
- BUG();
-
- *info=m_alloc_clear(sizeof(struct exec_info));
-
- if(name)
- (*info)->name=m_strdup(name);
- (*info)->binary=binary;
- (*info)->writeonly=writeonly;
-
- /* Expand the args, if any */
- if(args_in && expand_args(*info,args_in))
- goto fail;
-
-#ifdef EXEC_TEMPFILE_ONLY
- if(!(*info)->use_temp_files)
- {
- log_error(_("this platform requires temp files when calling external "
- "programs\n"));
- goto fail;
- }
-
-#else /* !EXEC_TEMPFILE_ONLY */
-
- /* If there are no args, or there are args, but no temp files, we
- can use fork/exec/pipe */
- if(args_in==NULL || (*info)->use_temp_files==0)
- {
- int to[2],from[2];
-
- if(pipe(to)==-1)
- goto fail;
-
- if(pipe(from)==-1)
- {
- close(to[0]);
- close(to[1]);
- goto fail;
- }
-
- if(((*info)->child=fork())==-1)
- {
- close(to[0]);
- close(to[1]);
- close(from[0]);
- close(from[1]);
- goto fail;
- }
-
- if((*info)->child==0)
- {
- char *shell=getenv("SHELL");
-
- if(shell==NULL)
- shell="/bin/sh";
-
- /* I'm the child */
-
- /* If the program isn't going to respond back, they get to
- keep their stdout/stderr */
- if(!(*info)->writeonly)
- {
- /* implied close of STDERR */
- if(dup2(STDOUT_FILENO,STDERR_FILENO)==-1)
- _exit(1);
-
- /* implied close of STDOUT */
- close(from[0]);
- if(dup2(from[1],STDOUT_FILENO)==-1)
- _exit(1);
- }
-
- /* implied close of STDIN */
- close(to[1]);
- if(dup2(to[0],STDIN_FILENO)==-1)
- _exit(1);
-
- if(args_in==NULL)
- {
- if(DBG_EXTPROG)
- log_debug("execlp: %s\n",program);
-
- execlp(program,program,NULL);
- }
- else
- {
- if(DBG_EXTPROG)
- log_debug("execlp: %s -c %s\n",shell,(*info)->command);
-
- execlp(shell,shell,"-c",(*info)->command,NULL);
- }
-
- /* If we get this far the exec failed. Clean up and return. */
-
- log_error(_("unable to execute %s \"%s\": %s\n"),
- args_in==NULL?"program":"shell",
- args_in==NULL?program:shell,
- strerror(errno));
-
- /* This mimics the POSIX sh behavior - 127 means "not found"
- from the shell. */
- if(errno==ENOENT)
- _exit(127);
-
- _exit(1);
- }
-
- /* I'm the parent */
-
- close(to[0]);
-
- (*info)->tochild=fdopen(to[1],binary?"wb":"w");
- if((*info)->tochild==NULL)
- {
- close(to[1]);
- ret=G10ERR_WRITE_FILE;
- goto fail;
- }
-
- close(from[1]);
-
- (*info)->fromchild=iobuf_fdopen(from[0],"r");
- if((*info)->fromchild==NULL)
- {
- close(from[0]);
- ret=G10ERR_READ_FILE;
- goto fail;
- }
-
- /* fd iobufs are cached?! */
- iobuf_ioctl((*info)->fromchild,3,1,NULL);
-
- return 0;
- }
-#endif /* !EXEC_TEMPFILE_ONLY */
-
- if(DBG_EXTPROG)
- log_debug("using temp file `%s'\n",(*info)->tempfile_in);
-
- /* It's not fork/exec/pipe, so create a temp file */
- (*info)->tochild=fopen((*info)->tempfile_in,binary?"wb":"w");
- if((*info)->tochild==NULL)
- {
- log_error(_("can't create `%s': %s\n"),
- (*info)->tempfile_in,strerror(errno));
- ret=G10ERR_WRITE_FILE;
- goto fail;
- }
-
- ret=0;
-
- fail:
- return ret;
-}
-
-int exec_read(struct exec_info *info)
-{
- int ret=G10ERR_GENERAL;
-
- fclose(info->tochild);
- info->tochild=NULL;
-
- if(info->use_temp_files)
- {
- if(DBG_EXTPROG)
- log_debug("system() command is %s\n",info->command);
-
-#if defined (__MINGW32__) || defined (__CYGWIN32__)
- info->progreturn=win_system(info->command);
-#else
- info->progreturn=system(info->command);
-#endif
-
- if(info->progreturn==-1)
- {
- log_error(_("system error while calling external program: %s\n"),
- strerror(errno));
- info->progreturn=127;
- goto fail;
- }
-
-#if defined(WIFEXITED) && defined(WEXITSTATUS)
- if(WIFEXITED(info->progreturn))
- info->progreturn=WEXITSTATUS(info->progreturn);
- else
- {
- log_error(_("unnatural exit of external program\n"));
- info->progreturn=127;
- goto fail;
- }
-#else
- /* If we don't have the macros, do the best we can. */
- info->progreturn = (info->progreturn & 0xff00) >> 8;
-#endif
-
- /* 127 is the magic value returned from system() to indicate
- that the shell could not be executed, or from /bin/sh to
- indicate that the program could not be executed. */
-
- if(info->progreturn==127)
- {
- log_error(_("unable to execute external program\n"));
- goto fail;
- }
-
- if(!info->writeonly)
- {
- info->fromchild=iobuf_open(info->tempfile_out);
- if(info->fromchild==NULL)
- {
- log_error(_("unable to read external program response: %s\n"),
- strerror(errno));
- ret=G10ERR_READ_FILE;
- goto fail;
- }
-
- /* Do not cache this iobuf on close */
- iobuf_ioctl(info->fromchild,3,1,NULL);
- }
- }
-
- ret=0;
-
- fail:
- return ret;
-}
-
-int exec_finish(struct exec_info *info)
-{
- int ret=info->progreturn;
-
- if(info->fromchild)
- iobuf_close(info->fromchild);
-
- if(info->tochild)
- fclose(info->tochild);
-
-#ifndef EXEC_TEMPFILE_ONLY
- if(info->child>0)
- {
- if(waitpid(info->child,&info->progreturn,0)!=0 &&
- WIFEXITED(info->progreturn))
- ret=WEXITSTATUS(info->progreturn);
- else
- {
- log_error(_("unnatural exit of external program\n"));
- ret=127;
- }
- }
-#endif
-
- if(info->madedir && !info->keep_temp_files)
- {
- if(info->tempfile_in)
- {
- if(unlink(info->tempfile_in)==-1)
- log_info(_("WARNING: unable to remove tempfile (%s) `%s': %s\n"),
- "in",info->tempfile_in,strerror(errno));
- }
-
- if(info->tempfile_out)
- {
- if(unlink(info->tempfile_out)==-1)
- log_info(_("WARNING: unable to remove tempfile (%s) `%s': %s\n"),
- "out",info->tempfile_out,strerror(errno));
- }
-
- if(rmdir(info->tempdir)==-1)
- log_info(_("WARNING: unable to remove temp directory `%s': %s\n"),
- info->tempdir,strerror(errno));
- }
-
- m_free(info->command);
- m_free(info->name);
- m_free(info->tempdir);
- m_free(info->tempfile_in);
- m_free(info->tempfile_out);
- m_free(info);
-
- return ret;
-}
-#endif /* ! NO_EXEC */
-
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