83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
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/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2015 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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static int
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openprocnotes(int pid)
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{
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char file[128];
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int32_t f;
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sprint(file, "#p/%d/note", pid);
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f = open(file, OWRITE);
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if(f < 0){
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sprint(file, "/proc/%d/note", pid);
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f = open(file, OWRITE);
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}
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if(f < 0)
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werrstr("postnote: cannot open neither #p/%d/note nor /proc/%d/note", pid, pid);
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return f;
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}
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static int
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opengroupnotes(int pid)
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{
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char file[128];
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int32_t f;
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sprint(file, "#p/%d/notepg", pid);
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f = open(file, OWRITE);
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if(f < 0){
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sprint(file, "/proc/%d/notepg", pid);
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f = open(file, OWRITE);
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}
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if(f < 0)
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werrstr("postnote: cannot open neither #p/%d/notepg nor /proc/%d/notepg", pid, pid);
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return f;
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}
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int
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postnote(int group, int pid, const char *note)
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{
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int f, r;
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switch(group) {
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case PNPROC:
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f = openprocnotes(pid);
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break;
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case PNGROUP:
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f = opengroupnotes(pid);
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break;
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default:
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werrstr("postnote: invalid group flag %d", group);
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return -1;
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}
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if(f < 0)
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return f;
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r = strlen(note);
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if(write(f, note, r) != r) {
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close(f);
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return -1;
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}
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close(f);
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return 0;
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}
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