diff options
Diffstat (limited to 'usr/src/lib/libc/port/gen/deflt.c')
| -rw-r--r-- | usr/src/lib/libc/port/gen/deflt.c | 140 |
1 files changed, 125 insertions, 15 deletions
diff --git a/usr/src/lib/libc/port/gen/deflt.c b/usr/src/lib/libc/port/gen/deflt.c index 716b3dd79e..72a0f8862a 100644 --- a/usr/src/lib/libc/port/gen/deflt.c +++ b/usr/src/lib/libc/port/gen/deflt.c @@ -20,7 +20,7 @@ */ /* - * Copyright 2008 Sun Microsystems, Inc. All rights reserved. + * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ @@ -30,8 +30,6 @@ /* Copyright (c) 1987, 1988 Microsoft Corporation */ /* All Rights Reserved */ -#pragma ident "%Z%%M% %I% %E% SMI" - #include "lint.h" #include "libc.h" #include <stdio.h> @@ -45,14 +43,15 @@ #define TSTBITS(flags, mask) (((flags) & (mask)) == (mask)) -static void strip_quotes(char *); - struct thr_data { int Dcflags; /* [re-]initialized on each call to defopen() */ FILE *fp; char *buf; }; +static int defopen_common(const char *, struct thr_data *); +static void strip_quotes(char *); + #define BUFFERSIZE 1024 /* @@ -105,6 +104,46 @@ defopen(char *fn) { struct thr_data *thr_data = get_thr_data(); + return (defopen_common(fn, thr_data)); +} + +/* + * defopen_r() - declare defopen filename (reentrant) + * + * defopen_r(const char *fn) + * + * 'fn' is a full pathname of a file which becomes the one read + * by subsequent defread_r() calls. defopen_r returns a pointer + * to the internally allocated buffer containing the file descriptor. + * The pointer should be specified to the following defread_r and + * defcntl_r functions. As the pointer to be returned points to + * the libc lmalloc'd memory, defclose_r must be used to close + * the defopen file and to release the allocated memory. Caller + * must not try to release the memory by free(). + * + * see defread_r() for more details. + * + * EXIT returns non-NULL pointer if success + * returns NULL if error + */ +void * +defopen_r(const char *fn) +{ + /* memory allocated by lmalloc gets initialized to zeros */ + struct thr_data *thr_data = lmalloc(sizeof (struct thr_data)); + + if (defopen_common(fn, thr_data) < 0) { + if (thr_data != NULL) + lfree(thr_data, sizeof (struct thr_data)); + return (NULL); + } + + return ((void *)thr_data); +} + +static int +defopen_common(const char *fn, struct thr_data *thr_data) +{ if (thr_data == NULL) return (-1); @@ -121,7 +160,8 @@ defopen(char *fn) /* * We allocate the big buffer only if the fopen() succeeds. - * Notice that we deallocate the buffer only when the thread exits. + * Notice that we deallocate the buffer only when the thread exits + * for defopen(). * There are misguided applications that assume that data returned * by defread() continues to exist after defopen(NULL) is called. */ @@ -150,7 +190,7 @@ defopen(char *fn) * the matched string (*cp). If no line is found or no file * is open, defread() returns NULL. * - * Note that there is no way to simulatniously peruse multiple + * Note that there is no way to simultaneously peruse multiple * defopen files; since there is no way of indicating 'which one' * to defread(). If you want to peruse a secondary file you must * recall defopen(). If you need to go back to the first file, @@ -160,8 +200,29 @@ char * defread(char *cp) { struct thr_data *thr_data = get_thr_data(); + + return (defread_r(cp, thr_data)); +} + +/* + * defread_r() - read an entry from the defopen file + * + * defread_r(const char *cp, void *defp) + * + * defread_r scans the data file associated with the pointer + * specified by 'defp' that was returned by defopen_r(), and + * looks for a line which begins with the string '*cp'. + * If such a line is found, defread_r returns a pointer to + * the first character following the matched string (*cp). + * If no line is found or no file is open, defread_r() returns NULL. + */ +char * +defread_r(const char *cp, void *ptr) +{ + struct thr_data *thr_data = (struct thr_data *)ptr; int (*compare)(const char *, const char *, size_t); - char *buf_tmp, *ret_ptr = NULL; + char *buf_tmp; + char *ret_ptr = NULL; size_t off, patlen; if (thr_data == NULL || thr_data->fp == NULL) @@ -203,21 +264,52 @@ defread(char *cp) * * ENTRY * cmd Command. One of DC_GET, DC_SET. - * arg Depends on command. If DC_GET, ignored. If - * DC_GET, new flags value, created by ORing the DC_* bits. + * arg Depends on command. If DC_GET, ignored. + * If DC_SET, new flags value, created by ORing + * the DC_* bits. * RETURN * oldflags Old value of flags. -1 on error. * NOTES - * Currently only one bit of flags implemented, namely respect/ - * ignore case. The routine is as general as it is so that we - * leave our options open. E.g. we might want to specify rewind/ - * norewind before each defread. + * The following commands are implemented: + * + * DC_CASE: respect(on)/ignore(off) case + * DC_NOREWIND: don't(on)/do(off) reqind in defread + * DC_STRIP_QUOTES: strip(on)/leave(off) qoates */ - int defcntl(int cmd, int newflags) { struct thr_data *thr_data = get_thr_data(); + + return (defcntl_r(cmd, newflags, thr_data)); +} + +/* + * defcntl_r -- default control + * + * SYNOPSIS + * oldflags = defcntl_r(int cmd, int arg, void *defp); + * + * ENTRY + * cmd Command. One of DC_GET, DC_SET. + * arg Depends on command. If DC_GET, ignored. + * If DC_SET, new flags value, created by ORing + * the DC_* bits. + * defp pointer to the defopen'd descriptor + * + * RETURN + * oldflags Old value of flags. -1 on error. + * NOTES + * The following commands are implemented: + * + * DC_CASE: respect(on)/ignore(off) case + * DC_NOREWIND: don't(on)/do(off) reqind in defread + * DC_STRIP_QUOTES: strip(on)/leave(off) qoates + */ +int +defcntl_r(int cmd, int newflags, void *ptr) +{ + struct thr_data *thr_data = (struct thr_data *)ptr; int oldflags; if (thr_data == NULL) @@ -240,6 +332,24 @@ defcntl(int cmd, int newflags) } /* + * defclose_r() - close defopen file + * + * defclose_r(void *defp) + * + * defclose_r closes the defopen file associated with the specified + * pointer and releases the allocated resources. + */ +void +defclose_r(void *ptr) +{ + struct thr_data *thr_data = (struct thr_data *)ptr; + + (void) fclose(thr_data->fp); + lfree(thr_data->buf, BUFFERSIZE); + lfree(thr_data, sizeof (struct thr_data)); +} + +/* * strip_quotes -- strip double (") or single (') quotes from a buffer * * ENTRY |