107 lines
3.1 KiB
C
107 lines
3.1 KiB
C
#include "executor.h"
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#include "log.h"
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#include "optional.h"
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#include "pipeline.h"
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#include "util.h"
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#include <fcntl.h>
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#include <linux/limits.h>
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#include <spawn.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <uuid/uuid.h>
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const char* log_dir = "./"; // NOTE: must end with a /
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void set_logdir(const char* logdir) {
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log_dir = logdir;
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struct stat st = {0};
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if(stat(log_dir, &st) == -1)
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mkdir(log_dir, 0700);
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}
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char* create_pipeline_id() {
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uuid_t uuid;
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uuid_generate(uuid);
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// example uuid
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// 662ddee9-ee7c-4d13-8999-a2604c6d12d6
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// it's 36 characters (+null)
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char* pipeline_id = malloc(sizeof(char) * 37);
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uuid_unparse_lower(uuid, pipeline_id);
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return pipeline_id;
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}
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optional_int open_logfile(const char* const pipeline_id) {
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optional_int result;
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result.has_value = false;
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result.value = 0;
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char* log_file = join(pipeline_id, ".log");
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char* log_filepath = join(log_dir, log_file);
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int fd = open(log_filepath, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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if (fd != -1) {
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result.has_value = true;
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result.value = fd;
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} else
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perror("open");
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free(log_file);
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free(log_filepath);
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return result;
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}
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void executor(void* data) {
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// Create pipeline id
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char* pipeline_id = create_pipeline_id();
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// Create logfile path
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optional_int fd = open_logfile(pipeline_id);
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if(!fd.has_value) {
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log_error("could not open log file - not starting pipeline");
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return;
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}
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// spawn the process
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pid_t pid;
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posix_spawn_file_actions_t actions;
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posix_spawn_file_actions_init(&actions);
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posix_spawn_file_actions_adddup2(&actions, fd.value, STDOUT_FILENO);
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posix_spawn_file_actions_adddup2(&actions, fd.value, STDERR_FILENO);
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const pipeline_event* const e = data;
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char* path = join("PATH=", getenv("PATH"));
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char* name = join("SCI_PIPELINE_NAME=", e->name);
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char* url = join("SCI_PIPELINE_URL=", e->url);
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char* trigger = join("SCI_PIPELINE_TRIGGER=", e->trigger);
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char* id = join("SCI_PIPELINE_ID=", pipeline_id);
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char* envp[] = { path, name, url, trigger, id, NULL };
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int argc;
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char** argv = argv_split(e->command, &argc);
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log_trace("executing pipeline %s with argv:", e->name);
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for(int i = 0; i < argc; i++)
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log_trace(" \"%s\"", argv[i]);
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char arg0[PATH_MAX];
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if(which(argv[0], arg0, PATH_MAX) == -1)
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goto end;
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if(posix_spawn(&pid, arg0, &actions, NULL, argv, envp) != 0) {
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perror("posix_spawn");
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goto end; // I know. The raptors have picked up the scent. I'll just have to mask it with more stinky code.
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}
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log_info("{%s} (%s) spawned", pipeline_id, e->name);
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// Wait for process to complete
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int status;
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waitpid(pid, &status, 0);
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log_info("{%s} (%s) exited with status %d", pipeline_id, e->name, status);
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char buf[32];
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sprintf(buf, "exited with status %d", status);
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write(fd.value, buf, strnlen(buf, 32));
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end:
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argv_free(argv);
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close(fd.value);
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free(pipeline_id);
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free(name);
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free(url);
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free(trigger);
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free(id);
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free(data);
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}
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