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93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
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/*
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* shvar.h
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*
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* Interface for non-destructively reading/writing files containing
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* only shell variable declarations and full-line comments.
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*
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* Includes explicit inheritance mechanism intended for use with
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* Red Hat Linux ifcfg-* files. There is no protection against
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* inheritance loops; they will generally cause stack overflows.
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* Furthermore, they are only intended for one level of inheritance;
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* the value setting algorithm assumes this.
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*
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* Copyright 1999 Red Hat, Inc.
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _SHVAR_H
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#define _SHVAR_H
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _shvarFile shvarFile;
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struct _shvarFile {
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char *fileName; /* read-only */
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int fd; /* read-only */
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GList *lineList; /* read-only */
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GList *current; /* set implicitly or explicitly, points to element of lineList */
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gboolean modified; /* ignore */
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};
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/* Create the file <name>, return a shvarFile (never fails) */
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shvarFile *svCreateFile (const char *name);
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/* Open the file <name>, return shvarFile on success, NULL on failure */
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shvarFile *svOpenFile (const char *name, GError **error);
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/* Get the value associated with the key, and leave the current pointer
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* pointing at the line containing the value. The char* returned MUST
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* be freed by the caller.
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*/
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char *svGetValue (shvarFile *s, const char *key, gboolean verbatim);
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/* return TRUE if <key> resolves to any truth value (e.g. "yes", "y", "true")
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* return FALSE if <key> resolves to any non-truth value (e.g. "no", "n", "false")
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* return <def> otherwise
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*/
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gboolean svTrueValue (shvarFile *s, const char *key, gboolean def);
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/* Set the variable <key> equal to the value <value>.
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* If <key> does not exist, and the <current> pointer is set, append
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* the key=value pair after that line. Otherwise, prepend the pair
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* to the top of the file.
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*/
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void svSetValue (shvarFile *s, const char *key, const char *value, gboolean verbatim);
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/* Write the current contents iff modified. Returns FALSE on error
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* and TRUE on success. Do not write if no values have been modified.
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* The mode argument is only used if creating the file, not if
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* re-writing an existing file, and is passed unchanged to the
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* open() syscall.
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*/
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gboolean svWriteFile (shvarFile *s, int mode, GError **error);
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/* Close the file descriptor (if open) and free the shvarFile. */
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void svCloseFile (shvarFile *s);
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/* Return a new escaped string */
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char *svEscape (const char *s);
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/* Unescape a string in-place */
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void svUnescape (char *s);
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G_END_DECLS
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#endif /* ! _SHVAR_H */
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