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/* $OpenBSD: env.c,v 1.13 2002/07/11 20:15:40 millert Exp $ */
/* Copyright 1988,1990,1993,1994 by Paul Vixie
* All rights reserved
*/
/*
* Copyright (c) 1997,2000 by Internet Software Consortium, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#if !defined(lint) && !defined(LINT)
static char const rcsid[] = "$OpenBSD: env.c,v 1.13 2002/07/11 20:15:40 millert Exp $";
#endif
#include "cron.h"
char **
env_init(void) {
char **p = (char **) malloc(sizeof(char **));
if (p != NULL)
p[0] = NULL;
return (p);
}
void
env_free(char **envp) {
char **p;
for (p = envp; *p != NULL; p++)
free(*p);
free(envp);
}
char **
env_copy(char **envp) {
int count, i, save_errno;
char **p;
for (count = 0; envp[count] != NULL; count++)
continue;
p = (char **) malloc((count+1) * sizeof(char *)); /* 1 for the NULL */
if (p != NULL) {
for (i = 0; i < count; i++)
if ((p[i] = strdup(envp[i])) == NULL) {
save_errno = errno;
while (--i >= 0)
free(p[i]);
free(p);
errno = save_errno;
return (NULL);
}
p[count] = NULL;
}
return (p);
}
char **
env_set(char **envp, char *envstr) {
int count, found;
char **p, *envtmp;
/*
* 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.
*/
if ((envtmp = strdup(envstr)) == NULL)
return (NULL);
free(envp[found]);
envp[found] = envtmp;
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.
*/
if ((envtmp = strdup(envstr)) == NULL)
return (NULL);
p = (char **) realloc((void *) envp,
(size_t) ((count+1) * sizeof(char **)));
if (p == NULL) {
free(envtmp);
return (NULL);
}
p[count] = p[count-1];
p[count-1] = envtmp;
return (p);
}
/* return ERR = end of file
* FALSE = not an env setting (file was repositioned)
* TRUE = was an env setting
*/
int
load_env(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';
memmove(val, val+1, len);
}
}
}
}
/*
* This can't overflow because get_string() limited the size of the
* name and val fields. Still, it doesn't hurt...
*/
(void) snprintf(envstr, MAX_ENVSTR, "%s=%s", name, val);
Debug(DPARS, ("load_env, <%s> <%s> -> <%s>\n", name, val, envstr))
return (TRUE);
}
char *
env_get(char *name, char **envp) {
int len = strlen(name);
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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