63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2016-2017 Giacomo Tesio <giacomo@tesio.it>
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*
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* Jehanne is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <libc.h>
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int
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jehanne_putenv(const char *name, const char *value)
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{
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int f;
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int32_t l;
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char path[127+5+1];
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assert(name != nil);
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assert(value != nil);
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if(name[0]=='\0')
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goto BadName;
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if(jehanne_strcmp(name, ".")==0 || jehanne_strcmp(name, "..")==0)
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goto BadName;
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if(jehanne_strchr(name, '/')!=nil)
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goto BadName;
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jehanne_snprint(path, sizeof path, "/env/%s", name);
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if(jehanne_strcmp(path+5, name) != 0)
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goto BadName;
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f = jehanne_ocreate(path, OWRITE, 0664);
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if(f < 0){
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/* try with #e, in case of a previous sys_rfork(RFCNAMEG)
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*/
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jehanne_snprint(path, sizeof path, "#e/%s", name);
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f = jehanne_ocreate(path, OWRITE, 0664);
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if(f < 0)
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return -1;
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}
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l = jehanne_strlen(value);
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if(l > 0 && jehanne_write(f, value, l) != l){
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sys_close(f);
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return -1;
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}
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sys_close(f);
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return 0;
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BadName:
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jehanne_werrstr("bad env name: '%s'", name);
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return -1;
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}
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