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/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZGetVariable, ZSetVariable, and ZUnsetVariable
* functions.
*
* Created by: Robert French
*
* Copyright (c) 1987 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#include "libpurple/internal.h"
#include "internal.h"
#include "util.h"
#include <ctype.h>
#ifndef WIN32
#include <pwd.h>
#endif
static char *get_localvarfile __P((void));
static char *get_varval __P((char *fn, char *val));
static int varline __P((char *bfr, char *var));
char *ZGetVariable(var)
char *var;
{
char *varfile, *ret;
if ((varfile = get_localvarfile()) == NULL)
return ((char *)0);
ret = get_varval(varfile, var);
g_free(varfile);
if (ret != ZERR_NONE)
return ret;
#ifdef WIN32
varfile = g_strdup("C:\\zephyr\\zephyr.var");
#else
varfile = g_strdup_printf("%s/zephyr.vars", CONFDIR);
#endif
ret = get_varval(varfile, var);
g_free(varfile);
return ret;
}
Code_t ZSetVariable(var, value)
char *var;
char *value;
{
int written;
FILE *fpin, *fpout;
char *varfile, *varfilebackup, varbfr[512];
written = 0;
if ((varfile = get_localvarfile()) == NULL)
return (ZERR_INTERNAL);
varfilebackup = g_strconcat(varfile, ".backup", NULL);
if (!(fpout = fopen(varfilebackup, "w"))) {
g_free(varfile);
g_free(varfilebackup);
return (errno);
}
if ((fpin = fopen(varfile, "r")) != NULL) {
while (fgets(varbfr, sizeof varbfr, fpin) != (char *) 0) {
if (varbfr[strlen(varbfr)-1] < ' ')
varbfr[strlen(varbfr)-1] = '\0';
if (varline(varbfr, var)) {
fprintf(fpout, "%s = %s\n", var, value);
written = 1;
}
else
fprintf(fpout, "%s\n", varbfr);
}
(void) fclose(fpin); /* don't care about errs on input */
}
if (!written)
fprintf(fpout, "%s = %s\n", var, value);
if (fclose(fpout) == EOF) {
g_free(varfilebackup);
g_free(varfile);
return(EIO); /* can't rely on errno */
}
if (rename(varfilebackup, varfile)) {
g_free(varfilebackup);
g_free(varfile);
return (errno);
}
g_free(varfilebackup);
g_free(varfile);
return (ZERR_NONE);
}
Code_t ZUnsetVariable(var)
char *var;
{
FILE *fpin, *fpout;
char *varfile, *varfilebackup, varbfr[512];
if ((varfile = get_localvarfile()) == NULL)
return (ZERR_INTERNAL);
varfilebackup = g_strconcat(varfile, ".backup", NULL);
if (!(fpout = fopen(varfilebackup, "w"))) {
g_free(varfile);
g_free(varfilebackup);
return (errno);
}
if ((fpin = fopen(varfile, "r")) != NULL) {
while (fgets(varbfr, sizeof varbfr, fpin) != (char *) 0) {
if (varbfr[strlen(varbfr)-1] < ' ')
varbfr[strlen(varbfr)-1] = '\0';
if (!varline(varbfr, var))
fprintf(fpout, "%s\n", varbfr);
}
(void) fclose(fpin); /* don't care about read close errs */
}
if (fclose(fpout) == EOF) {
g_free(varfilebackup);
g_free(varfile);
return(EIO); /* errno isn't reliable */
}
if (rename(varfilebackup, varfile)) {
g_free(varfilebackup);
g_free(varfile);
return (errno);
}
g_free(varfilebackup);
g_free(varfile);
return (ZERR_NONE);
}
static char *get_localvarfile(void)
{
const char *base;
#ifndef WIN32
struct passwd *pwd;
base = purple_home_dir();
#else
base = getenv("HOME");
if (!base)
base = getenv("HOMEPATH");
if (!base)
base = "C:\\";
#endif
if (!base) {
#ifndef WIN32
if (!(pwd = getpwuid((int) getuid()))) {
fprintf(stderr, "Zephyr internal failure: Can't find your entry in /etc/passwd\n");
return NULL;
}
base = pwd->pw_dir;
#endif
}
return g_strconcat(base, "/.zephyr.vars", NULL);
}
static char *get_varval(fn, var)
char *fn;
char *var;
{
FILE *fp;
static char varbfr[512];
int i;
fp = fopen(fn, "r");
if (!fp)
return ((char *)0);
while (fgets(varbfr, sizeof varbfr, fp) != (char *) 0) {
if (varbfr[strlen(varbfr)-1] < ' ')
varbfr[strlen(varbfr)-1] = '\0';
if (!(i = varline(varbfr, var)))
continue;
(void) fclose(fp); /* open read-only, don't care */
return (varbfr+i);
}
(void) fclose(fp); /* open read-only, don't care */
return ((char *)0);
}
/* If the variable in the line bfr[] is the same as var, return index to
the variable value, else return 0. */
static int varline(bfr, var)
char *bfr;
char *var;
{
register char *cp;
if (!bfr[0] || bfr[0] == '#') /* comment or null line */
return (0);
cp = bfr;
while (*cp && !isspace(*cp) && (*cp != '='))
cp++;
#ifndef WIN32
#define max(a,b) ((a > b) ? (a) : (b))
#endif
if (g_ascii_strncasecmp(bfr, var, max(strlen(var), cp - bfr)))
return(0); /* var is not the var in
bfr ==> no match */
cp = strchr(bfr, '=');
if (!cp)
return(0);
cp++;
while (*cp && isspace(*cp)) /* space up to variable value */
cp++;
return (cp - bfr); /* return index */
}
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