84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/*++
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/* NAME
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/* percentm 3
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/* SUMMARY
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/* expand %m embedded in string to system error text
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/* SYNOPSIS
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/* #include <percentm.h>
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/*
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/* char *percentm(const char *src, int err)
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/* DESCRIPTION
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/* The percentm() routine makes a copy of the null-terminated string
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/* given via the \fIsrc\fR argument, with %m sequences replaced by
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/* the system error text corresponding to the \fIerr\fR argument.
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/* The result is overwritten upon each successive call.
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/*
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/* Arguments:
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/* .IP src
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/* A null-terminated input string with zero or more %m sequences.
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/* .IP err
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/* A legal \fIerrno\fR value. The text corresponding to this error
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/* value is used when expanding %m sequences.
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/* SEE ALSO
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/* syslog(3) system logger library
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/* HISTORY
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/* .ad
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/* .fi
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/* A percentm() routine appears in the TCP Wrapper software
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/* by Wietse Venema.
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/* LICENSE
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/* .ad
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/* .fi
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/* The Secure Mailer license must be distributed with this software.
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/* AUTHOR(S)
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/* Wietse Venema
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/* IBM T.J. Watson Research
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/* P.O. Box 704
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/* Yorktown Heights, NY 10598, USA
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/*--*/
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/* System libraries. */
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#include <sys_defs.h>
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#include <string.h>
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/* Utility library. */
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#include "vstring.h"
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#include "percentm.h"
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/* percentm - replace %m by error message corresponding to value in err */
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char *percentm(const char *str, int err)
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{
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static VSTRING *vp;
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const unsigned char *ip = (const unsigned char *) str;
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if (vp == 0)
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vp = vstring_alloc(100); /* grows on demand */
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VSTRING_RESET(vp);
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while (*ip) {
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switch (*ip) {
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default:
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VSTRING_ADDCH(vp, *ip++);
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break;
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case '%':
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switch (ip[1]) {
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default: /* leave %<any> alone */
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VSTRING_ADDCH(vp, *ip++);
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case '\0': /* don't fall off end */
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VSTRING_ADDCH(vp, *ip++);
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break;
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case 'm': /* replace %m */
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vstring_strcat(vp, strerror(err));
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ip += 2;
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break;
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}
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}
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}
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VSTRING_TERMINATE(vp);
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return (vstring_str(vp));
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}
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