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Set required environmental variables for rootless docker-compose ACAP #58

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Merged
merged 1 commit into from
Feb 13, 2024
Merged

Set required environmental variables for rootless docker-compose ACAP #58

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46 changes: 46 additions & 0 deletions app/dockerdwrapperwithcompose.c
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Original file line number Diff line number Diff line change
Expand Up @@ -23,11 +23,17 @@
#include <netinet/in.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <syslog.h>
#include <unistd.h>

#define APP_NAME "dockerdwrapperwithcompose"

/** @brief APP path in a device */
#define APP_DIRECTORY "/usr/local/packages/" APP_NAME

/**
* @brief Callback called when the dockerd process exits.
*/
Expand Down Expand Up @@ -668,6 +674,46 @@ main(void)
openlog(NULL, LOG_PID, LOG_USER);
syslog(LOG_INFO, "Started logging.");

// Get UID of the current user
uid_t uid = getuid();

char path[strlen(APP_DIRECTORY) + 256];
sprintf(path,
"/bin:/usr/bin:%s:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin",
APP_DIRECTORY);

char docker_host[256];
sprintf(docker_host, "unix://run/user/%d/docker.sock", (int)uid);

char xdg_runtime_dir[256];
sprintf(xdg_runtime_dir, "/run/user/%d", (int)uid);

// Set environment variables
if (setenv("PATH", path, 1) != 0) {
syslog(LOG_ERR, "Error setting environment PATH.");
return -1;
}

if (setenv("HOME", APP_DIRECTORY, 1) != 0) {
syslog(LOG_ERR, "Error setting environment APP_LOCATION.");
return -1;
}

if (setenv("DOCKER_HOST", docker_host, 1) != 0) {
syslog(LOG_ERR, "Error setting environment DOCKER_HOST.");
return -1;
}

if (setenv("XDG_RUNTIME_DIR", xdg_runtime_dir, 1) != 0) {
syslog(LOG_ERR, "Error setting environment XDG_RUNTIME_DIR.");
return -1;
}

syslog(LOG_INFO, "PATH: %s", path);
syslog(LOG_INFO, "HOME: %s", APP_DIRECTORY);
syslog(LOG_INFO, "DOCKER_HOST: %s", docker_host);
syslog(LOG_INFO, "XDG_RUNTIME_DIR: %s", xdg_runtime_dir);

// Setup signal handling.
init_signals();

Expand Down
4 changes: 0 additions & 4 deletions app/postinstallscript.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -33,10 +33,6 @@ Wants=network-online.target
After=user@$_uid.service
Requires=user@$_uid.service
[Service]
Environment=PATH=/bin:/usr/bin:$_appdirectory:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
Environment=HOME=$_appdirectory
Environment=DOCKER_HOST=unix://run/user/$_uid/docker.sock
Environment=XDG_RUNTIME_DIR=/run/user/$_uid
ExecStartPre=+$_appdirectory/handle_directories.sh $_uid $_uname $_gname
EOF

Expand Down