summaryrefslogtreecommitdiffstats
path: root/src/popen.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/popen.c')
-rw-r--r--src/popen.c204
1 files changed, 0 insertions, 204 deletions
diff --git a/src/popen.c b/src/popen.c
deleted file mode 100644
index eda1c05b9..000000000
--- a/src/popen.c
+++ /dev/null
@@ -1,204 +0,0 @@
-#include "common.h"
-
-/*
-struct mypopen {
- pid_t pid;
- FILE *fp;
- struct mypopen *next;
- struct mypopen *prev;
-};
-
-static struct mypopen *mypopen_root = NULL;
-
-static void mypopen_add(FILE *fp, pid_t *pid) {
- struct mypopen *mp = malloc(sizeof(struct mypopen));
- if(!mp) {
- fatal("Cannot allocate %zu bytes", sizeof(struct mypopen))
- return;
- }
-
- mp->fp = fp;
- mp->pid = pid;
- mp->next = popen_root;
- mp->prev = NULL;
- if(mypopen_root) mypopen_root->prev = mp;
- mypopen_root = mp;
-}
-
-static void mypopen_del(FILE *fp) {
- struct mypopen *mp;
-
- for(mp = mypopen_root; mp; mp = mp->next)
- if(mp->fd == fp) break;
-
- if(!mp) error("Cannot find mypopen() file pointer in open childs.");
- else {
- if(mp->next) mp->next->prev = mp->prev;
- if(mp->prev) mp->prev->next = mp->next;
- if(mypopen_root == mp) mypopen_root = mp->next;
- free(mp);
- }
-}
-*/
-#define PIPE_READ 0
-#define PIPE_WRITE 1
-
-FILE *mypopen(const char *command, volatile pid_t *pidptr)
-{
- int pipefd[2];
-
- if(pipe(pipefd) == -1) return NULL;
-
- int pid = fork();
- if(pid == -1) {
- close(pipefd[PIPE_READ]);
- close(pipefd[PIPE_WRITE]);
- return NULL;
- }
- if(pid != 0) {
- // the parent
- *pidptr = pid;
- close(pipefd[PIPE_WRITE]);
- FILE *fp = fdopen(pipefd[PIPE_READ], "r");
- /*mypopen_add(fp, pid);*/
- return(fp);
- }
- // the child
-
- // close all files
- int i;
- for(i = (int) (sysconf(_SC_OPEN_MAX) - 1); i > 0; i--)
- if(i != STDIN_FILENO && i != STDERR_FILENO && i != pipefd[PIPE_WRITE]) close(i);
-
- // move the pipe to stdout
- if(pipefd[PIPE_WRITE] != STDOUT_FILENO) {
- dup2(pipefd[PIPE_WRITE], STDOUT_FILENO);
- close(pipefd[PIPE_WRITE]);
- }
-
-#ifdef DETACH_PLUGINS_FROM_NETDATA
- // this was an attempt to detach the child and use the suspend mode charts.d
- // unfortunatelly it does not work as expected.
-
- // fork again to become session leader
- pid = fork();
- if(pid == -1)
- error("pre-execution of command '%s' on pid %d: Cannot fork 2nd time.", command, getpid());
-
- if(pid != 0) {
- // the parent
- exit(0);
- }
-
- // set a new process group id for just this child
- if( setpgid(0, 0) != 0 )
- error("pre-execution of command '%s' on pid %d: Cannot set a new process group.", command, getpid());
-
- if( getpgid(0) != getpid() )
- error("pre-execution of command '%s' on pid %d: Cannot set a new process group. Process group set is incorrect. Expected %d, found %d", command, getpid(), getpid(), getpgid(0));
-
- if( setsid() != 0 )
- error("pre-execution of command '%s' on pid %d: Cannot set session id.", command, getpid());
-
- fprintf(stdout, "MYPID %d\n", getpid());
- fflush(NULL);
-#endif
-
- // reset all signals
- signals_unblock();
- signals_reset();
-
- debug(D_CHILDS, "executing command: '%s' on pid %d.", command, getpid());
- execl("/bin/sh", "sh", "-c", command, NULL);
- exit(1);
-}
-
-FILE *mypopene(const char *command, volatile pid_t *pidptr, char **env) {
- int pipefd[2];
-
- if(pipe(pipefd) == -1)
- return NULL;
-
- int pid = fork();
- if(pid == -1) {
- close(pipefd[PIPE_READ]);
- close(pipefd[PIPE_WRITE]);
- return NULL;
- }
- if(pid != 0) {
- // the parent
- *pidptr = pid;
- close(pipefd[PIPE_WRITE]);
- FILE *fp = fdopen(pipefd[PIPE_READ], "r");
- return(fp);
- }
- // the child
-
- // close all files
- int i;
- for(i = (int) (sysconf(_SC_OPEN_MAX) - 1); i > 0; i--)
- if(i != STDIN_FILENO && i != STDERR_FILENO && i != pipefd[PIPE_WRITE]) close(i);
-
- // move the pipe to stdout
- if(pipefd[PIPE_WRITE] != STDOUT_FILENO) {
- dup2(pipefd[PIPE_WRITE], STDOUT_FILENO);
- close(pipefd[PIPE_WRITE]);
- }
-
- execle("/bin/sh", "sh", "-c", command, NULL, env);
- exit(1);
-}
-
-int mypclose(FILE *fp, pid_t pid) {
- debug(D_EXIT, "Request to mypclose() on pid %d", pid);
-
- /*mypopen_del(fp);*/
-
- // close the pipe fd
- // this is required in musl
- // without it the childs do not exit
- close(fileno(fp));
-
- // close the pipe file pointer
- fclose(fp);
-
- errno = 0;
-
- siginfo_t info;
- if(waitid(P_PID, (id_t) pid, &info, WEXITED) != -1) {
- switch(info.si_code) {
- case CLD_EXITED:
- if(info.si_status)
- error("child pid %d exited with code %d.", info.si_pid, info.si_status);
- return(info.si_status);
-
- case CLD_KILLED:
- error("child pid %d killed by signal %d.", info.si_pid, info.si_status);
- return(-1);
-
- case CLD_DUMPED:
- error("child pid %d core dumped by signal %d.", info.si_pid, info.si_status);
- return(-2);
-
- case CLD_STOPPED:
- error("child pid %d stopped by signal %d.", info.si_pid, info.si_status);
- return(0);
-
- case CLD_TRAPPED:
- error("child pid %d trapped by signal %d.", info.si_pid, info.si_status);
- return(-4);
-
- case CLD_CONTINUED:
- error("child pid %d continued by signal %d.", info.si_pid, info.si_status);
- return(0);
-
- default:
- error("child pid %d gave us a SIGCHLD with code %d and status %d.", info.si_pid, info.si_code, info.si_status);
- return(-5);
- }
- }
- else
- error("Cannot waitid() for pid %d", pid);
-
- return 0;
-}