243 lines
5.4 KiB
C
243 lines
5.4 KiB
C
/* Copyright 1988,1990,1993,1994 by Paul Vixie
|
|
* All rights reserved
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
|
|
* 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 ISC DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
|
|
*/
|
|
|
|
#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++) ;
|
|
|
|
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);
|
|
}
|
|
|
|
/* The following states are used by load_env(), traversed in order: */
|
|
enum env_state {
|
|
NAMEI, /* First char of NAME, may be quote */
|
|
NAME, /* Subsequent chars of NAME */
|
|
EQ1, /* After end of name, looking for '=' sign */
|
|
EQ2, /* After '=', skipping whitespace */
|
|
VALUEI, /* First char of VALUE, may be quote */
|
|
VALUE, /* Subsequent chars of VALUE */
|
|
FINI, /* All done, skipping trailing whitespace */
|
|
ERROR, /* Error */
|
|
};
|
|
|
|
/* 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;
|
|
enum env_state state;
|
|
char name[MAX_ENVSTR], val[MAX_ENVSTR];
|
|
char quotechar, *c, *str;
|
|
|
|
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))
|
|
|
|
bzero(name, sizeof name);
|
|
bzero(val, sizeof val);
|
|
str = name;
|
|
state = NAMEI;
|
|
quotechar = '\0';
|
|
c = envstr;
|
|
while (state != ERROR && *c) {
|
|
switch (state) {
|
|
case NAMEI:
|
|
case VALUEI:
|
|
if (*c == '\'' || *c == '"')
|
|
quotechar = *c++;
|
|
state++;
|
|
/* FALLTHROUGH */
|
|
case NAME:
|
|
case VALUE:
|
|
if (quotechar) {
|
|
if (*c == quotechar) {
|
|
state++;
|
|
c++;
|
|
break;
|
|
}
|
|
if (state == NAME && *c == '=') {
|
|
state = ERROR;
|
|
break;
|
|
}
|
|
}
|
|
else {
|
|
if (state == NAME) {
|
|
if (isspace((unsigned char) *c)) {
|
|
c++;
|
|
state++;
|
|
break;
|
|
}
|
|
if (*c == '=') {
|
|
state++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
*str++ = *c++;
|
|
break;
|
|
|
|
case EQ1:
|
|
if (*c == '=') {
|
|
state++;
|
|
str = val;
|
|
quotechar = '\0';
|
|
}
|
|
else {
|
|
if (!isspace((unsigned char) *c))
|
|
state = ERROR;
|
|
}
|
|
c++;
|
|
break;
|
|
|
|
case EQ2:
|
|
case FINI:
|
|
if (isspace((unsigned char) *c))
|
|
c++;
|
|
else
|
|
state++;
|
|
break;
|
|
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
if (state != FINI && !(state == VALUE && !quotechar)) {
|
|
Debug(DPARS, ("load_env, not an env var, state = %d\n", state))
|
|
fseek(f, filepos, 0);
|
|
Set_LineNum(fileline);
|
|
return (FALSE);
|
|
}
|
|
if (state == VALUE) {
|
|
/* End of unquoted value: trim trailing whitespace */
|
|
c = val + strlen(val);
|
|
while (c > val && isspace((unsigned char) c[-1]))
|
|
*(--c) = '\0';
|
|
}
|
|
|
|
/* 2 fields from parser; looks like an env setting */
|
|
|
|
/*
|
|
* This can't overflow because get_string() limited the size of the
|
|
* name and val fields. Still, it doesn't hurt to be careful...
|
|
*/
|
|
if (!glue_strings(envstr, MAX_ENVSTR, name, val, '='))
|
|
return (FALSE);
|
|
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);
|
|
}
|