sendmail/libsm/cf.c

/*
 * Copyright (c) 2001 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 *
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sm/gen.h>
SM_RCSID("@(#)$Id: cf.c,v 1.4 2001/02/01 02:40:21 dmoen Exp $")

#include <ctype.h>
#include <errno.h>

#include <sm/cf.h>
#include <sm/io.h>
#include <sm/string.h>
#include <sm/heap.h>

/*
**  SM_CF_GETOPT -- look up option values in the sendmail.cf file
**
**  Open the sendmail.cf file and parse all of the 'O' directives.
**  Each time one of the options named in the option vector optv
**  is found, store a malloced copy of the option value in optv.
**
**  Parameters:
**      path -- pathname of sendmail.cf file
**      optc -- size of option vector
**      optv -- pointer to option vector
**
**  Results:
**      0 on success, or an errno value on failure.
**      An exception is raised on malloc failure.
*/

int
sm_cf_getopt(path, optc, optv)
    char *path;
    int optc;
    SM_CF_OPT_T *optv;
{
    SM_FILE_T *cfp;
    char buf[2048];
    char *p;
    char *id;
    char *idend;
    char *val;
    int i;

    cfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, path, SM_IO_RDONLY, NULL);
    if (cfp == NULL)
        return errno;

    while (sm_io_fgets(cfp, SM_TIME_DEFAULT, buf, sizeof(buf)) != NULL)
    {
        p = strchr(buf, '\n');
        if (p != NULL)
            *p = '\0';

        if (buf[0] != 'O' || buf[1] != ' ')
            continue;

        id = &buf[2];
        val = strchr(id, '=');
        if (val == NULL)
            val = idend = id + strlen(id);
        else
        {
            idend = val;
            ++val;
            while (*val == ' ')
                ++val;
            while (idend > id && idend[-1] == ' ')
                --idend;
            *idend = '\0';
        }

        for (i = 0; i < optc; ++i)
        {
            if (sm_strcasecmp(optv[i].opt_name, id) == 0)
            {
                optv[i].opt_val = sm_strdup_x(val);
                break;
            }
        }
    }
    if (sm_io_error(cfp))
    {
        int save_errno = errno;

        (void) sm_io_close(cfp, SM_TIME_DEFAULT);
        errno = save_errno;
        return errno;
    }
    (void) sm_io_close(cfp, SM_TIME_DEFAULT);
    return 0;
}