--- /dev/null
+/* Copyright 1993-95 by Carl Harris, Jr.
+ * All rights reserved
+ *
+ * Distribute freely, except: don't remove my name from the source or
+ * documentation (don't take credit for my work), mark your changes (don't
+ * get me blamed for your possible bugs), don't alter or remove this
+ * notice. May be sold if buildable source is provided to buyer. No
+ * warrantee of any kind, express or implied, is included with this
+ * software; use at your own risk, responsibility for damages (if any) to
+ * anyone resulting from the use of this software rests entirely with the
+ * user.
+ *
+ * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
+ * I'll try to keep a version up to date. I can be reached as follows:
+ * Carl Harris <ceharris@mal.com>
+ */
+
+/***********************************************************************
+ module: popclient.c
+ project: popclient
+ programmer: Carl Harris, ceharris@mal.com
+ description: main driver module for popclient
+
+ $Log: fetchmail.c,v $
+ Revision 1.1 1996/06/24 18:32:00 esr
+ Initial revision
+
+ Revision 1.7 1995/09/07 22:37:34 ceharris
+ Preparation for 3.0b4 release.
+
+ Revision 1.6 1995/08/14 18:36:43 ceharris
+ Patches to support POP3's LAST command.
+ Final revisions for beta3 release.
+
+ Revision 1.5 1995/08/10 00:32:39 ceharris
+ Preparation for 3.0b3 beta release:
+ - added code for --kill/--keep, --limit, --protocol, --flush
+ options; --pop2 and --pop3 options now obsoleted by --protocol.
+ - added support for APOP authentication, including --with-APOP
+ argument for configure.
+ - provisional and broken support for RPOP
+ - added buffering to SockGets and SockRead functions.
+ - fixed problem of command-line options not being correctly
+ carried into the merged options record.
+
+ Revision 1.4 1995/08/09 01:32:56 ceharris
+ Version 3.0 beta 2 release.
+ Added
+ - .poprc functionality
+ - GNU long options
+ - multiple servers on the command line.
+ Fixed
+ - Passwords showing up in ps output.
+
+ Revision 1.3 1995/08/08 01:01:25 ceharris
+ Added GNU-style long options processing.
+ Fixed password in 'ps' output problem.
+ Fixed various RCS tag blunders.
+ Integrated .poprc parser, lexer, etc into Makefile processing.
+
+ ***********************************************************************/
+
+
+#include <config.h>
+
+#include <stdio.h>
+
+#if defined(STDC_HEADERS)
+#include <stdlib.h>
+#include <string.h>
+#endif
+
+#if defined(HAVE_UNISTD_H)
+#include <unistd.h>
+#endif
+
+#include <signal.h>
+#include <pwd.h>
+#include <errno.h>
+
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/wait.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "popclient.h"
+
+/* release info */
+#define RELEASE_TAG "3.0b6"
+
+#ifdef HAVE_PROTOTYPES
+/* prototypes for internal functions */
+int showoptions (struct optrec *options);
+int parseMDAargs (struct optrec *options);
+int showversioninfo (void);
+#endif
+
+/* Controls the detail of status/progress messages written to stderr */
+int outlevel; /* see the O_.* constants in popclient.h */
+
+/* args for the MDA, parsed out in the usual fashion by parseMDAargs() */
+#ifdef MDA_ARGS
+char *mda_argv [MDA_ARGCOUNT + 2];
+#else
+char *mda_argv [2];
+#endif
+
+
+/*********************************************************************
+ function: main
+ description: main driver routine
+ arguments:
+ argc argument count as passed by runtime startup code.
+ argv argument strings as passed by runtime startup code.
+
+ return value: an exit status code for the shell -- see the
+ PS_.* constants defined above.
+ calls: parsecmdline, setdefaults, openuserfolder, doPOP2.
+ globals: none.
+ *********************************************************************/
+
+main (argc,argv)
+int argc;
+char **argv;
+{
+ int mboxfd;
+ struct optrec cmd_opts, def_opts, merged_opts;
+ int popstatus;
+ int parsestatus;
+ char *servername;
+
+ parsestatus = parsecmdline(argc,argv,&cmd_opts);
+ if (parsestatus >= 0) {
+ setoutlevel(&cmd_opts);
+ if (!cmd_opts.versioninfo)
+ if (setdefaults(&def_opts) == 0) {
+ if (prc_parse_file(prc_getpathname(&cmd_opts,&def_opts)) == 0) {
+ while ((servername = getnextserver(argc, argv, &parsestatus))
+ != (char *) 0) {
+ if (outlevel != O_SILENT)
+ fprintf(stderr, "querying %s\n", servername);
+ else
+ ;
+ prc_mergeoptions(servername, &cmd_opts, &def_opts, &merged_opts);
+ parseMDAargs(&merged_opts);
+ switch (merged_opts.whichpop) {
+ case P_POP2:
+ popstatus = doPOP2(servername, &merged_opts);
+ break;
+ case P_POP3:
+ case P_APOP:
+ popstatus = doPOP3(servername, &merged_opts);
+ break;
+ default:
+ fprintf(stderr,"unsupported protocol selected.\n");
+ }
+ }
+ }
+ else
+ popstatus = PS_SYNTAX;
+ }
+ else
+ popstatus = PS_UNDEFINED;
+ else
+ showversioninfo();
+ }
+ else
+ popstatus = PS_SYNTAX;
+
+ exit(popstatus);
+}
+
+
+
+/*********************************************************************
+ function: showversioninfo
+ description: display program release and compiler info
+ arguments: none.
+ return value: none.
+ calls: none.
+ globals: none.
+ *********************************************************************/
+
+int showversioninfo()
+{
+ printf("popclient release %s\n",RELEASE_TAG);
+}
+
+
+
+
+/******************************************************************
+ function: setoutlevel
+ description: set output verbosity level.
+ arguments:
+ options command-line options.
+
+ ret. value: none.
+ globals: writes outlevel.
+ calls: none.
+ *****************************************************************/
+
+int setoutlevel (options)
+struct optrec *options;
+{
+ if (options->verbose)
+ outlevel = O_VERBOSE;
+ else if (options->silent)
+ outlevel = O_SILENT;
+ else
+ outlevel = O_NORMAL;
+}
+
+
+
+/*********************************************************************
+ function: openuserfolder
+ description: open the file to which the retrieved messages will
+ be appended. Do NOT call when options->foldertype
+ is OF_SYSMBOX.
+
+ arguments:
+ options fully-determined options (i.e. parsed, defaults invoked,
+ etc).
+
+ return value: file descriptor for the open file, else -1.
+ calls: none.
+ globals: none.
+ *********************************************************************/
+
+int openuserfolder (options)
+struct optrec *options;
+{
+ int fd;
+
+ if (options->foldertype == OF_STDOUT)
+ return(1);
+ else /* options->foldertype == OF_USERMBOX */
+ if ((fd = open(options->userfolder,O_CREAT|O_WRONLY|O_APPEND,0600)) >= 0) {
+ return(fd);
+ }
+ else {
+ perror("popclient: openuserfolder: open()");
+ return(-1);
+ }
+
+}
+
+
+
+/*********************************************************************
+ function: openmailpipe
+ description: open a one-way pipe to the mail delivery agent.
+ arguments:
+ options fully-determined options (i.e. parsed, defaults invoked,
+ etc).
+
+ return value: open file descriptor for the pipe or -1.
+ calls: none.
+ globals: reads mda_argv.
+ *********************************************************************/
+
+int openmailpipe (options)
+struct optrec *options;
+{
+ int pipefd [2];
+ int childpid;
+ char binmailargs [80];
+
+ if (pipe(pipefd) < 0) {
+ perror("popclient: openmailpipe: pipe");
+ return(-1);
+ }
+ if ((childpid = fork()) < 0) {
+ perror("popclient: openmailpipe: fork");
+ return(-1);
+ }
+ else if (childpid == 0) {
+
+ /* in child process space */
+ close(pipefd[1]); /* close the 'write' end of the pipe */
+ close(0); /* get rid of inherited stdin */
+ if (dup(pipefd[0]) != 0) {
+ fputs("popclient: openmailpipe: dup() failed\n",stderr);
+ exit(1);
+ }
+
+ execv(MDA_PATH,mda_argv);
+
+ /* if we got here, an error occurred */
+ perror("popclient: openmailpipe: exec");
+ return(-1);
+
+ }
+
+ /* in the parent process space */
+ close(pipefd[0]); /* close the 'read' end of the pipe */
+ return(pipefd[1]);
+}
+
+
+
+/*********************************************************************
+ function: closeuserfolder
+ description: close the user-specified mail folder.
+ arguments:
+ fd mail folder descriptor.
+
+ return value: zero if success else -1.
+ calls: none.
+ globals: none.
+ *********************************************************************/
+
+int closeuserfolder(fd)
+int fd;
+{
+ int err;
+
+ if (fd != 1) { /* not stdout */
+ err = close(fd);
+ }
+ else
+ err = 0;
+
+ if (err)
+ perror("popclient: closeuserfolder: close");
+
+ return(err);
+}
+
+
+
+/*********************************************************************
+ function: closemailpipe
+ description: close pipe to the mail delivery agent.
+ arguments:
+ options fully-determined options record
+ fd pipe descriptor.
+
+ return value: 0 if success, else -1.
+ calls: none.
+ globals: none.
+ *********************************************************************/
+
+int closemailpipe (fd)
+int fd;
+{
+ int err;
+ int childpid;
+
+ err = close(fd);
+#if defined(STDC_HEADERS)
+ childpid = wait(NULL);
+#else
+ childpid = wait((int *) 0);
+#endif
+ if (err)
+ perror("popclient: closemailpipe: close");
+
+ return(err);
+}
+
+
+
+/*********************************************************************
+ function: parseMDAargs
+ description: parse the argument string given in MDA_ARGS into
+ a regular *argv[] array.
+ arguments:
+ options fully-determined options record pointer.
+
+ return value: none.
+ calls: none.
+ globals: writes mda_argv.
+ *********************************************************************/
+
+int parseMDAargs (options)
+struct optrec *options;
+{
+ int argi;
+ char *argp;
+
+ /* first put the MDA alias in as argv[0] */
+ mda_argv[0] = MDA_ALIAS;
+
+#ifdef MDA_ARGS
+
+ /* make a writeable copy of MDA_ARGS */
+ argp = strcpy((char *) malloc(strlen(MDA_ARGS)+1), MDA_ARGS);
+
+ while (*argp != '\0' && isspace(*argp)) /* skip null first arg */
+ argp++;
+
+ /* now punch nulls into the delimiting whitespace in the args */
+ for (argi = 1;
+ *argp != '\0';
+ argi++) {
+
+ mda_argv[argi] = argp; /* store pointer to this argument */
+
+ /* find end of this argument */
+ while (!(*argp == '\0' || isspace(*argp)))
+ argp++;
+
+ /* punch in a null terminator */
+ if (*argp != '\0')
+ *(argp++) = '\0';
+
+ /* check for macros */
+ if (strcmp(mda_argv[argi],"$u") == 0)
+ mda_argv[argi] =
+ strcpy((char *) malloc(strlen(options->loginid)+1),options->loginid);
+ else
+ ; /* no macros to expand */
+
+ }
+ mda_argv[argi] = (char *) 0;
+
+#else
+
+ mda_argv[1] = (char *) 0;
+
+#endif
+
+}
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