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/*
* env.c -- small service routines
*
* Copyright 1998 by Eric S. Raymond
* For license terms, see the file COPYING in this directory.
*/
#include "config.h"
#include <stdio.h>
#include <ctype.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#include <pwd.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_GETHOSTBYNAME
#include <netdb.h>
#endif /* HAVE_GETHOSTBYNAME */
#include <sys/types.h>
#include <time.h>
#include "fetchmail.h"
#include "i18n.h"
extern char *getenv(); /* needed on sysV68 R3V7.1. */
extern char *program_name;
void envquery(int argc, char **argv)
/* set up basic stuff from the environment (including the rc file name) */
{
struct passwd *pw;
if ((program_name = strrchr(argv[0], '/')) != NULL)
++program_name;
else
program_name = argv[0];
if ((user = getenv("USER")) == (char *)NULL)
user = getenv("LOGNAME");
if ((user == (char *)NULL) || (home = getenv("HOME")) == (char *)NULL)
{
if ((pw = getpwuid(getuid())) != NULL)
{
user = pw->pw_name;
home = pw->pw_dir;
}
else
{
fprintf(stderr,
_("%s: can't find your name and home directory!\n"),
program_name);
exit(PS_UNDEFINED);
}
}
#define RCFILE_NAME ".fetchmailrc"
rcfile = (char *) xmalloc(strlen(home)+strlen(RCFILE_NAME)+2);
/* avoid //.fetchmailrc */
if (strcmp(home, "/") != 0) {
strcpy(rcfile, home);
} else {
*rcfile = '\0';
}
strcat(rcfile, "/");
strcat(rcfile, RCFILE_NAME);
}
char *host_fqdn(void)
/* get the FQDN of the machine we're running */
{
char tmpbuf[HOSTLEN+1];
if (gethostname(tmpbuf, sizeof(tmpbuf)))
{
fprintf(stderr, _("%s: can't determine your host!"),
program_name);
exit(PS_DNS);
}
#ifdef HAVE_GETHOSTBYNAME
/* if we got a . in the hostname assume it is a FQDN */
if (strchr(tmpbuf, '.') == NULL)
{
struct hostent *hp;
/* if we got a basename (as we do in Linux) make a FQDN of it */
hp = gethostbyname(tmpbuf);
if (hp == (struct hostent *) NULL)
{
/* exit with error message */
fprintf(stderr,
_("gethostbyname failed for %s\n"), tmpbuf);
exit(PS_DNS);
}
return(xstrdup(hp->h_name));
}
else
#endif /* HAVE_GETHOSTBYNAME */
return(xstrdup(tmpbuf));
}
static char *tzoffset(time_t *now)
/* calculate timezone offset */
{
static char offset_string[6];
struct tm gmt, *lt;
int off;
char sign = '+';
gmt = *gmtime(now);
lt = localtime(now);
off = (lt->tm_hour - gmt.tm_hour) * 60 + lt->tm_min - gmt.tm_min;
if (lt->tm_year < gmt.tm_year)
off -= 24 * 60;
else if (lt->tm_year > gmt.tm_year)
off += 24 * 60;
else if (lt->tm_yday < gmt.tm_yday)
off -= 24 * 60;
else if (lt->tm_yday > gmt.tm_yday)
off += 24 * 60;
if (off < 0) {
sign = '-';
off = -off;
}
if (off >= 24 * 60) /* should be impossible */
off = 23 * 60 + 59; /* if not, insert silly value */
sprintf(offset_string, "%c%02d%02d", sign, off / 60, off % 60);
return (offset_string);
}
char *rfc822timestamp(void)
/* return a timestamp in RFC822 form */
{
time_t now;
static char buf[40];
time(&now);
#ifdef HAVE_STRFTIME
/*
* Conform to RFC822. We generate a 4-digit year here, avoiding
* Y2K hassles. Max length of this timestamp in an English locale
* should be 29 chars. The only things that should vary by locale
* are the day and month abbreviations.
*/
strftime(buf, sizeof(buf)-1,
"%a, %d %b %Y %H:%M:%S XXXXX (%Z)", localtime(&now));
strncpy(strstr(buf, "XXXXX"), tzoffset(&now), 5);
#else
/*
* This is really just a portability fallback, as the
* date format ctime(3) emits is not RFC822
* conformant.
*/
strcpy(buf, ctime(&now));
buf[strlen(buf)-1] = '\0'; /* remove trailing \n */
#endif /* HAVE_STRFTIME */
return(buf);
}
const char *showproto(int proto)
/* protocol index to protocol name mapping */
{
switch (proto)
{
case P_AUTO: return("auto");
#ifdef POP2_ENABLE
case P_POP2: return("POP2");
#endif /* POP2_ENABLE */
case P_POP3: return("POP3");
case P_IMAP: return("IMAP");
case P_IMAP_K4: return("IMAP-K4");
#ifdef GSSAPI
case P_IMAP_GSS: return("IMAP-GSS");
#endif /* GSSAPI */
case P_APOP: return("APOP");
case P_RPOP: return("RPOP");
case P_ETRN: return("ETRN");
default: return("unknown?!?");
}
}
char *visbuf(const char *buf)
/* visibilize a given string */
{
static char vbuf[BUFSIZ];
char *tp = vbuf;
while (*buf)
{
if (*buf == '"')
{
*tp++ = '\\'; *tp++ = '"';
buf++;
}
else if (isprint(*buf) || *buf == ' ')
*tp++ = *buf++;
else if (*buf == '\n')
{
*tp++ = '\\'; *tp++ = 'n';
buf++;
}
else if (*buf == '\r')
{
*tp++ = '\\'; *tp++ = 'r';
buf++;
}
else if (*buf == '\b')
{
*tp++ = '\\'; *tp++ = 'b';
buf++;
}
else if (*buf < ' ')
{
*tp++ = '\\'; *tp++ = '^'; *tp++ = '@' + *buf;
buf++;
}
else
{
(void) sprintf(tp, "\\0x%02x", *buf++);
tp += strlen(tp);
}
}
*tp++ = '\0';
return(vbuf);
}
/* env.c ends here */
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