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Comment:Added an lc_seterrstr() function
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SHA1: f953f16a77c572d5c5e61ea30ba7d6ffd481ed59
User & Date: rkeene on 2006-12-16 17:06:08
Other Links: manifest | tags
Context
2006-12-17
00:11
Updated libconfig to reset lc_errno at the start of each function check-in: c8032b5a5e user: rkeene tags: trunk
2006-12-16
17:06
Added an lc_seterrstr() function check-in: f953f16a77 user: rkeene tags: trunk
17:06
Subversion to Fossil Copy Commit. Please Ignore. Recording copying lc_geterrstr.3.in to lc_seterrstr.3.in. check-in: 9f254f7f02 user: rkeene tags: trunk
Changes
Hide Diffs Side-by-Side Diffs Ignore Whitespace Patch

Modified build/build_web_manpages from [15a48182c3] to [30cc606ea6]. 

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#! /bin/bash
if [ ! -f libconfig.3 ]; then
	cd ..
fi

if [ ! -f libconfig.3 ]; then
	echo  'Could not find libconfig.3, aborting.' >&2
	exit 1
fi

for file in lc_cleanup lc_geterrno lc_geterrstr lc_process lc_process_file lc_register_callback lc_register_var libconfig; do
for file in lc_cleanup lc_geterrno lc_geterrstr lc_seterrstr lc_process lc_process_file lc_register_callback lc_register_var libconfig; do
	man2html -H "REPLACE" -M "/ME" < ${file}.3 | grep -iv '^Content-Type:' | sed 's@"http://REPLACE/ME?\([0-9]*\)+\([^"]*\)"@"\2.htm"@;s@http://REPLACE/ME@@g' > /web/rkeene/docs/oss/libconfig/${file}.htm
done

build/prep.sh became executable with contents [3f4d67e154].

Modified lc_cleanup.3.in from [1a58c9eea6] to [efcfee978b].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_seterrstr (3),
.BR lc_geterrstr (3),
.BR lc_geterrno (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified lc_geterrno.3.in from [cd34ea9cd7] to [d8407e858d].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_geterrstr (3),
.BR lc_seterrstr (3),
.BR lc_cleanup (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified lc_geterrstr.3.in from [72b9664bc6] to [36f9da08c6].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_seterrstr (3),
.BR lc_geterrno (3),
.BR lc_cleanup (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified lc_process.3.in from [95fe0e123b] to [0f2dddbaaa].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_geterrno (3),
.BR lc_seterrstr (3),
.BR lc_geterrstr (3),
.BR lc_cleanup (3),
.BR lc_process_file (3)

Modified lc_process_file.3.in from [ea98de7617] to [aecb56c52b].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_geterrno (3),
.BR lc_geterrstr (3),
.BR lc_seterrstr (3),
.BR lc_cleanup (3),
.BR lc_process (3)

Modified lc_register_callback.3.in from [cea18abe88] to [caede5b68d].

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.TP
LC_CBRET_OKAY
Returning LC_CBRET_OKAY from a callback indicates that all went well and further processing may continue.
.TP
LC_CBRET_ERROR
Returnning LC_CBRET_ERROR from a callback indicates that the command failed for some reason, the error will be passed back down the chain back to the
.BR lc_process (3)
call that began processing the configuration data.  If LC_CBRET_ERROR is returned from a callback that begins a section, the entire section is ignored.
call that began processing the configuration data.  If LC_CBRET_ERROR is returned from a callback that begins a section, the entire section is ignored.  If LC_CBRET_ERROR is returned from a callback that ends a section, the error is ignored.


.SH "RETURN VALUE"
On success 0 is returned, otherwise -1 is returned.

.SH EXAMPLE
.nf
#include <libconfig.h>
#include <strings.h>
#include <stdlib.h>
#include <stdio.h>

int callback_ifmodule(const char *shortvar, const char *var,
                      const char *arguments, const char *value,
                      lc_flags_t flags, void *extra) {
	if (flags == LC_FLAGS_SECTIONEND) {
		return(LC_CBRET_OKAY);
	}

	if (flags != LC_FLAGS_SECTIONSTART) {
		fprintf(stderr, "IfModule can only be used as a \\
		        section.\\n");
		lc_seterrstr("IfModule can only be used as a \\
		              section.");
		return(LC_CBRET_ERROR);
	}
	if (arguments == NULL) {
		fprintf(stderr, "You must specify an argument to \\
		        IfModule.\\n");
		lc_seterrstr("You must specify an argument to \\
		              IfModule.");
		return(LC_CBRET_ERROR);
	}

	printf("IfModule %s\\n", arguments);

	if (strcasecmp(arguments, "MyModule") == 0) {
		return(LC_CBRET_IGNORESECTION);
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.SH ERRORS
.TP
.B ENOMEM
Memory could not be allocated to create the needed internal structures.

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_geterrno (3),
.BR lc_geterrstr (3),
.BR lc_seterrstr (3),
.BR lc_cleanup (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified lc_register_var.3.in from [6224b99a5a] to [26c717cf6a].

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	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_callback (3),
.BR lc_geterrno (3),
.BR lc_geterrstr (3),
.BR lc_seterrstr (3),
.BR lc_cleanup (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified lc_seterrstr.3.in from [72b9664bc6] to [eb760dc316]. 

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.TH LC_GETERRSTR 3 "25 Oct 04" "@PACKAGE_STRING@"
.SH NAME
lc_geterrstr \- Retrieve a human readable error message.
lc_geterrstr \- Set an error message from a callback.

.SH SYNOPSIS
.B #include <libconfig.h>
.sp
.BI "char *lc_geterrstr(void);"
.BI "void lc_seterrstr(const char *" errstr ");"

.SH DESCRIPTION
The
.BR lc_geterrstr (3)
.BR lc_seterrstr (3)
function returns a string describing the last error code set.

function sets a human readable error message to be returned by
.SH EXAMPLE
.nf
#include <libconfig.h>
#include <stdlib.h>
#include <stdio.h>

int main(int argc, char **argv) {
	int lc_p_ret, lc_rv_ret;
	char *filename = NULL;

	lc_rv_ret = lc_register_var("File", LC_VAR_STRING,
	                            &filename, 'f');

	if (lc_rv_ret != 0) {
		fprintf(stderr, "Error registering variable: %s.\\n",
		        lc_geterrstr());
.BR lc_geterrstr (3)
		return(EXIT_FAILURE);
	}

function when an error is returned from a callback function.  The value is ignored if the error is not related to a callback.
	lc_p_ret = lc_process(argc, argv, "example", LC_CONF_APACHE,
	                      NULL);

	lc_cleanup();

	if (lc_p_ret != 0) {
		fprintf(stderr, "Error processing configuration: \\
		        %s\\n", lc_geterrstr());
		return(EXIT_FAILURE);
	}

	if (filename != NULL) {
		printf("File specified was: %s\\n", filename);
	} else {
		printf("No filename specified.\\n");
	}

	return(EXIT_SUCCESS);
}
.fi

.SH "SEE ALSO"
.BR libconfig (3),
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_geterrno (3),
.BR lc_geterrstr (3),
.BR lc_cleanup (3),
.BR lc_process_file (3),
.BR lc_process (3)

Modified libconfig.3.in from [08444a4029] to [93e1c94d05].

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.BI "int lc_process(int " argc ", char **" argv ", const char *" appname ", lc_conf_type_t " type ", const char *" extra ");"

.BI "lc_err_t lc_geterrno(void);"

.BI "char *lc_geterrstr(void);"

.BI "void lc_geterrstr(const char *" errstr ");"

.SH DESCRIPTION
Libconfig is a library to provide easy access to configuration data in a consistent and logical manner.  Variables (registered through
.BR lc_register_var (3)
or
.BR lc_register_callback (3))
are processed with the
.BR lc_process (3)
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.fi

.SH "SEE ALSO"
.BR lc_register_var (3),
.BR lc_register_callback (3),
.BR lc_geterr (3),
.BR lc_geterrstr (3),
.BR lc_seterrstr (3),
.BR lc_cleanup (3),
.BR lc_process (3),
.BR lc_process_file (3)

Modified libconfig.c from [341b40c218] to [508cc92a36].

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#ifdef HAVE_PWD_H
#include <pwd.h>
#endif

struct lc_varhandler_st *varhandlers = NULL;
lc_err_t lc_errno = LC_ERR_NONE;
const char *lc_err_usererrmsg = NULL;
const char *lc_errfile = NULL;
int lc_optind = 0;
int lc_errline = 0;

extern char **environ;

static int lc_process_var_string(void *data, const char *value, const char **endptr) {
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		next = handler->_next;

		free(handler);

		handler = next;
	}

	if (lc_err_usererrmsg) {
		free((char *) lc_err_usererrmsg);

		lc_err_usererrmsg = NULL;
	}

	varhandlers = NULL;

	return;
}

int lc_process(int argc, char **argv, const char *appname, lc_conf_type_t type, const char *extra) {
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	retval = lc_errno;

	lc_errno = LC_ERR_NONE;

	return(retval);
}

void lc_seterrstr(const char *usererrmsg) {
	lc_err_usererrmsg = strdup(usererrmsg);
}

char *lc_geterrstr(void) {
	static char retval[512];
	char *errmsg = NULL;
	const char *errmsg = NULL;

	switch (lc_errno) {
		case LC_ERR_NONE:
			errmsg = "Success";
			break;
		case LC_ERR_INVCMD:
			errmsg = "Invalid command or option";
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		case LC_ERR_BADFORMAT:
			errmsg = "Bad data specified or incorrect format.";
			break;
		case LC_ERR_CANTOPEN:
			errmsg = "Can't open file.";
			break;
		case LC_ERR_CALLBACK:
			if (lc_err_usererrmsg) {
				errmsg = lc_err_usererrmsg;
			} else {
			errmsg = "Error return from application handler.";
				errmsg = "Error return from application handler.";
			}
			break;
		case LC_ERR_ENOMEM:
			errmsg = "Insuffcient memory.";
			break;
	}

	/*
︙

Modified libconfig.h.in from [6dd0b27349] to [a51c1e0b82].

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__BLANK_LINE__

int lc_process(int argc, char **argv, const char *appname, lc_conf_type_t type, const char *extra);
int lc_register_callback(const char *var, char opt, lc_var_type_t type, int (*callback)(const char *, const char *, const char *, const char *, lc_flags_t, void *), void *extra);
int lc_register_var(const char *var, lc_var_type_t type, void *data, char opt);
lc_err_t lc_geterrno(void);
void lc_seterrstr(const char *usererrstr);
char *lc_geterrstr(void);
int lc_process_file(const char *appname, const char *pathname, lc_conf_type_t type);
void lc_cleanup(void);

__BLANK_LINE__

!define LC_CBRET_IGNORESECTION (255)
︙

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