Private
Public Access
38 lines
2.2 KiB
C
38 lines
2.2 KiB
C
#ifndef HISTOGRAM_AUTOSTART_H
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#define HISTOGRAM_AUTOSTART_H
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#ifndef BOOT_DIRECTORY
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#define BOOT_DIRECTORY "/var/lib/webosbrew/init.d"
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#endif
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#ifndef BOOT_SCRIPT
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#define BOOT_SCRIPT "/media/developer/apps/usr/palm/services/org.webosbrew.histogramhyperion.service/boot.sh"
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#endif
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#define BOOT_HOOK BOOT_DIRECTORY "/60-histogramhyperion"
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/* Exact pre-0.6.1 hook; only this known own file may be migrated. */
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static const char legacy_boot_script[] = "#!/bin/sh\n# Histogram Hyperion own boot hook v1\n(\n attempt=0\n while [ -x /var/lib/webosbrew/init.d/60-histogramhyperion ] && [ \"$attempt\" -lt 120 ]; do\n result=$(timeout 12 luna-send -n 1 luna://org.webosbrew.histogramhyperion.service/start '{}' 2>&1)\n case \"$result\" in\n *'\"running\":true'*) exit 0 ;;\n esac\n attempt=$((attempt + 1))\n sleep 5\n done\n echo 'Histogram Hyperion boot start cancelled or timed out'\n) >/var/lib/webosbrew/histogramhyperion-boot.log 2>&1 </dev/null &\nexit 0\n";
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/* 0: absent, 1: own legacy copy, 2: own symlink, -1: foreign/error. */
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static int boot_hook_kind(void){
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struct stat st;if(lstat(BOOT_HOOK,&st)!=0)return errno==ENOENT?0:-1;
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if(S_ISLNK(st.st_mode)){
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char target[sizeof(BOOT_SCRIPT)+1];ssize_t n=readlink(BOOT_HOOK,target,sizeof(target));
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return n==(ssize_t)(sizeof(BOOT_SCRIPT)-1) && memcmp(target,BOOT_SCRIPT,(size_t)n)==0?2:-1;
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}
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if(!S_ISREG(st.st_mode))return -1;
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char data[sizeof(legacy_boot_script)];int fd=open(BOOT_HOOK,O_RDONLY|O_NOFOLLOW|O_CLOEXEC);if(fd<0)return -1;
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ssize_t n=read(fd,data,sizeof(data));close(fd);
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return n==(ssize_t)(sizeof(legacy_boot_script)-1) && memcmp(data,legacy_boot_script,(size_t)n)==0?1:-1;
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}
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static bool boot_enabled(void){return boot_hook_kind()>0 && access(BOOT_HOOK,X_OK)==0;}
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static bool set_boot(bool enabled){
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int kind=boot_hook_kind();if(kind<0)return false;
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if(!enabled)return kind==0 || unlink(BOOT_HOOK)==0;
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if(access(BOOT_SCRIPT,X_OK)!=0)return false;
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if(kind==2)return true;
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if(mkdir(BOOT_DIRECTORY,0755)!=0 && errno!=EEXIST)return false;
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/* Never overwrite another process's temporary file or a foreign hook. */
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if(symlink(BOOT_SCRIPT,BOOT_HOOK ".tmp")!=0)return false;
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bool ok=rename(BOOT_HOOK ".tmp",BOOT_HOOK)==0;
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if(!ok)unlink(BOOT_HOOK ".tmp");
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return ok;
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}
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#endif
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