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/* Copyright 1988,1990,1993,1994 by Paul Vixie
* All rights reserved
*
* Distribute freely, except: don't remove my name from the source or
* documentation (don't take credit for my work), mark your changes (don't
* get me blamed for your possible bugs), don't alter or remove this
* notice. May be sold if buildable source is provided to buyer. No
* warrantee of any kind, express or implied, is included with this
* software; use at your own risk, responsibility for damages (if any) to
* anyone resulting from the use of this software rests entirely with the
* user.
*
* Send bug reports, bug fixes, enhancements, requests, flames, etc., and
* I'll try to keep a version up to date. I can be reached as follows:
* Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
*/
#if !defined(lint) && !defined(LINT)
static char rcsid[] = "$Id: env.c,v 1.5 1998/03/30 06:59:44 deraadt Exp $";
#endif
#include "cron.h"
char **
env_init()
{
register char **p = (char **) malloc(sizeof(char **));
if (p)
p[0] = NULL;
return (p);
}
void
env_free(envp)
char **envp;
{
char **p;
for (p = envp; *p; p++)
free(*p);
free(envp);
}
char **
env_copy(envp)
register char **envp;
{
register int count, i;
register char **p;
for (count = 0; envp[count] != NULL; count++)
;
p = (char **) malloc((count+1) * sizeof(char *)); /* 1 for the NULL */
if (p == NULL) {
errno = ENOMEM;
return NULL;
}
for (i = 0; i < count; i++)
if ((p[i] = strdup(envp[i])) == NULL) {
while (--i >= 0)
(void) free(p[i]);
free(p);
errno = ENOMEM;
return NULL;
}
p[count] = NULL;
return (p);
}
char **
env_set(envp, envstr)
char **envp;
char *envstr;
{
register int count, found;
register char **p;
/*
* count the number of elements, including the null pointer;
* also set 'found' to -1 or index of entry if already in here.
*/
found = -1;
for (count = 0; envp[count] != NULL; count++) {
if (!strcmp_until(envp[count], envstr, '='))
found = count;
}
count++; /* for the NULL */
if (found != -1) {
/*
* it exists already, so just free the existing setting,
* save our new one there, and return the existing array.
*/
free(envp[found]);
if ((envp[found] = strdup(envstr)) == NULL) {
envp[found] = "";
errno = ENOMEM;
return NULL;
}
return (envp);
}
/*
* it doesn't exist yet, so resize the array, move null pointer over
* one, save our string over the old null pointer, and return resized
* array.
*/
p = (char **) realloc((void *) envp,
(unsigned) ((count+1) * sizeof(char **)));
if (p == NULL) {
errno = ENOMEM;
return NULL;
}
p[count] = p[count-1];
if ((p[count-1] = strdup(envstr)) == NULL) {
errno = ENOMEM;
return NULL;
}
return (p);
}
/* return ERR = end of file
* FALSE = not an env setting (file was repositioned)
* TRUE = was an env setting
*/
int
load_env(envstr, f)
char *envstr;
FILE *f;
{
long filepos;
int fileline;
char name[MAX_ENVSTR], val[MAX_ENVSTR];
int fields;
filepos = ftell(f);
fileline = LineNumber;
skip_comments(f);
if (EOF == get_string(envstr, MAX_ENVSTR, f, "\n"))
return (ERR);
Debug(DPARS, ("load_env, read <%s>\n", envstr))
name[0] = val[0] = '\0';
fields = sscanf(envstr, "%[^ =] = %[^\n#]", name, val);
if (fields != 2) {
Debug(DPARS, ("load_env, not 2 fields (%d)\n", fields))
fseek(f, filepos, 0);
Set_LineNum(fileline);
return (FALSE);
}
/* 2 fields from scanf; looks like an env setting
*/
/*
* process value string
*/
/*local*/{
int len = strdtb(val);
if (len >= 2) {
if (val[0] == '\'' || val[0] == '"') {
if (val[len-1] == val[0]) {
val[len-1] = '\0';
(void) strcpy(val, val+1);
}
}
}
}
if (strlen(name) + 1 + strlen(val) >= MAX_ENVSTR-1)
return (FALSE);
(void) sprintf(envstr, "%s=%s", name, val);
Debug(DPARS, ("load_env, <%s> <%s> -> <%s>\n", name, val, envstr))
return (TRUE);
}
char *
env_get(name, envp)
register char *name;
register char **envp;
{
register int len = strlen(name);
register char *p, *q;
while ((p = *envp++) != NULL) {
if (!(q = strchr(p, '=')))
continue;
if ((q - p) == len && !strncmp(p, name, len))
return (q+1);
}
return (NULL);
}
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