mirror of
https://github.com/troglobit/finit.git
synced 2026-10-12 10:12:32 +00:00
Jonas Johansson
dddd45e3b5
Reassert condition when an unchanged/unmodified process goes from WAITING state to RUNNING. I.e. it had a condition that went to flux during `initctl reload`, which drove it to WAITING and was then sent SIGSTOP during reconf. Also, on condition update, loop through all services until no more state changes are observed. This allows long dependency chains of services to resolve and actually go back to RUNNING state as intended whenever any condition changes at runtime. Signed-off-by: Jonas Johansson <jonasj76@gmail.com> Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
/* Condition engine (read)
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*
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* Copyright (c) 2015-2017 Tobias Waldekranz <tobias@waldekranz.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <lite/lite.h>
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#include <stdio.h>
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#include "finit.h"
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#include "cond.h"
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#include "pid.h"
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#include "service.h"
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char *mkcond(char *buf, size_t len, char *nm)
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{
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snprintf(buf, len, "svc%s%s", nm[0] != '/' ? "/" : "", nm);
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return buf;
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}
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const char *condstr(enum cond_state s)
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{
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static const char *strs[] = {
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[COND_OFF] = "off",
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[COND_FLUX] = "flux",
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[COND_ON] = "on",
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};
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return strs[s];
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}
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const char *cond_path(const char *name)
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{
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char tmp[MAX_ARG_LEN];
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static char file[MAX_ARG_LEN];
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snprintf(tmp, sizeof(tmp), COND_PATH "/%s", name);
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return pid_runpath(tmp, file, sizeof(file));
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}
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unsigned int cond_get_gen(const char *file)
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{
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char *ptr, path[256];
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unsigned int gen;
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FILE *fp;
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int ret;
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/* /var/run --> /run symlink may not exist (yet) */
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ptr = pid_runpath(file, path, sizeof(path));
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fp = fopen(ptr, "r");
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if (!fp)
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return 0;
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ret = fscanf(fp, "%u", &gen);
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fclose(fp);
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return (ret == 1) ? gen : 0;
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}
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enum cond_state cond_get_path(const char *path)
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{
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int cgen, rgen;
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rgen = cond_get_gen(COND_RECONF);
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if (!rgen)
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return COND_OFF;
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cgen = cond_get_gen(path);
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if (!cgen)
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return COND_OFF;
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return (cgen == rgen) ? COND_ON : COND_FLUX;
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}
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enum cond_state cond_get(const char *name)
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{
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return cond_get_path(cond_path(name));
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}
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enum cond_state cond_get_agg(const char *names)
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{
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char *cond;
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enum cond_state s = COND_ON;
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static char conds[MAX_ARG_LEN];
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if (!names)
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return COND_ON;
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strlcpy(conds, names, sizeof(conds));
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for (cond = strtok(conds, ","); s && cond; cond = strtok(NULL, ","))
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s = min(s, cond_get(cond));
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return s;
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}
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int cond_affects(const char *name, const char *names)
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{
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char *cond;
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static char conds[MAX_ARG_LEN];
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if (!name || !names)
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return 0;
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strlcpy(conds, names, sizeof(conds));
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for (cond = strtok(conds, ","); cond; cond = strtok(NULL, ",")) {
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if (!strcmp(cond, name))
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return 1;
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}
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return 0;
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}
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/**
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* Local Variables:
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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