1/* $NetBSD$ */ 2 3/*++ 4/* NAME 5/* postconf_print 3 6/* SUMMARY 7/* basic line printing support 8/* SYNOPSIS 9/* #include <postconf.h> 10/* 11/* void pcf_print_line(fp, mode, const char *fmt, ...) 12/* VSTREAM *fp; 13/* int mode; 14/* const char *fmt; 15/* DESCRIPTION 16/* pcf_print_line() formats text, normalized whitespace, and 17/* optionally folds long lines. 18/* 19/* Arguments: 20/* .IP fp 21/* Output stream. 22/* .IP mode 23/* Bit-wise OR of zero or more of the following (other flags 24/* are ignored): 25/* .RS 26/* .IP PCF_FOLD_LINE 27/* Fold long lines. 28/* .RE 29/* .IP fmt 30/* Format string. 31/* DIAGNOSTICS 32/* Problems are reported to the standard error stream. 33/* LICENSE 34/* .ad 35/* .fi 36/* The Secure Mailer license must be distributed with this software. 37/* AUTHOR(S) 38/* Wietse Venema 39/* IBM T.J. Watson Research 40/* P.O. Box 704 41/* Yorktown Heights, NY 10598, USA 42/*--*/ 43 44/* System library. */ 45 46#include <sys_defs.h> 47#include <string.h> 48#include <stdarg.h> 49 50/* Utility library. */ 51 52#include <msg.h> 53#include <vstream.h> 54#include <vstring.h> 55 56/* Application-specific. */ 57 58#include <postconf.h> 59 60/* SLMs. */ 61 62#define STR(x) vstring_str(x) 63 64/* pcf_print_line - show line possibly folded, and with normalized whitespace */ 65 66void pcf_print_line(VSTREAM *fp, int mode, const char *fmt,...) 67{ 68 va_list ap; 69 static VSTRING *buf = 0; 70 char *start; 71 char *next; 72 int line_len = 0; 73 int word_len; 74 75 /* 76 * One-off initialization. 77 */ 78 if (buf == 0) 79 buf = vstring_alloc(100); 80 81 /* 82 * Format the text. 83 */ 84 va_start(ap, fmt); 85 vstring_vsprintf(buf, fmt, ap); 86 va_end(ap); 87 88 /* 89 * Normalize the whitespace. We don't use the line_wrap() routine because 90 * 1) that function does not normalize whitespace between words and 2) we 91 * want to normalize whitespace even when not wrapping lines. 92 * 93 * XXX Some parameters preserve whitespace: for example, smtpd_banner and 94 * smtpd_reject_footer. If we have to preserve whitespace between words, 95 * then perhaps readlline() can be changed to canonicalize whitespace 96 * that follows a newline. 97 */ 98 for (start = STR(buf); *(start += strspn(start, PCF_SEPARATORS)) != 0; start = next) { 99 word_len = strcspn(start, PCF_SEPARATORS); 100 if (*(next = start + word_len) != 0) 101 *next++ = 0; 102 if (word_len > 0 && line_len > 0) { 103 if ((mode & PCF_FOLD_LINE) == 0 104 || line_len + word_len < PCF_LINE_LIMIT) { 105 vstream_fputs(" ", fp); 106 line_len += 1; 107 } else { 108 vstream_fputs("\n" PCF_INDENT_TEXT, fp); 109 line_len = PCF_INDENT_LEN; 110 } 111 } 112 vstream_fputs(start, fp); 113 line_len += word_len; 114 } 115 vstream_fputs("\n", fp); 116} 117