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#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include "pg.h"
#include "atomicio.h"
int
send_cmd(char dest, int type, uint8_t arg, uint8_t *data, int data_len) {
struct conn *c;
struct route *r;
int fd = -1, len;
r = route_find(dest);
if (r)
fd = r->proc.fd[1];
else {
c = listener_conn_find_orig(dest);
if (c)
fd = c->fd;
else {
log_warn("send_cmd %d: no route to go to dest %c", type, dest);
return -1;
}
}
len = msg_send(fd, type, dest, arg, data_len, data);
return len;
}
int
intab(int *tab, int val, int len) {
int n;
for (n=0; n<len; n++) {
if (tab[n] == val)
return n;
}
return -1;
}
char **
explode(char *str, int len_str, char *delim, int *n_tokens) {
char *token, *saveptr;
char *to_explode;
char **exploded;
int idx_str, idx_delim;
int len_delim;
int c_tokens;
if (!str || len_str <= 0 || !delim || !n_tokens)
return NULL;
to_explode = xcalloc(len_str, sizeof(*to_explode));
if (!to_explode)
return NULL;
memcpy(to_explode, str, len_str);
/* count n_tokens */
len_delim = strlen(delim);
c_tokens = 1;
for (idx_str = 0; idx_str < len_str; idx_str++) {
for (idx_delim = 0; idx_delim < len_delim; idx_delim++) {
if (str[idx_str] == delim[idx_delim])
c_tokens++;
}
}
c_tokens++;
/* copy str (strdup() does not seem to be reliable) */
exploded = xcalloc(c_tokens, sizeof(*exploded));
if (!exploded) {
free(to_explode);
return NULL;
}
/* sep tokens */
*n_tokens = 0;
token = strtok_r(to_explode, delim, &saveptr);
while (token) {
exploded[*n_tokens] = token;
(*n_tokens)++;
token = strtok_r(NULL, delim, &saveptr);
}
exploded[*n_tokens] = NULL;
return exploded;
}
void
*xmalloc(size_t size) {
void *p;
if (size == 0) {
log_warn("attempted to malloc(0)");
return NULL;
}
p = malloc(size);
if (!p)
log_warn("malloc(%d) failed", size);
return p;
}
void *
xcalloc(size_t nmemb, size_t size) {
void *p;
if (nmemb == 0 || size == 0) {
log_warn("attempted to calloc(%d,%d)", nmemb, size);
return NULL;
}
p = calloc(nmemb, size);
if (!p)
log_warn("calloc(%d,%d) failed", nmemb, size);
return p;
}
int
setnonblock(int fd) {
int flags;
int ret;
log_debug("nonblock %d", fd);
if ((flags = fcntl(fd, F_GETFL, 0)) == -1)
flags = 0;
ret = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
if (ret < 0 )
log_warn("fcntl setnonblock err : %s", strerror(errno));
return ret;
}
int
execpipe(char *cmd, char **argv, int *pipes) {
int pipe_in[2], pipe_out[2];
pid_t pid;
pipe(pipe_in);
pipe(pipe_out);
pid = fork();
if (pid == -1) {
log_warn("failed to fork !");
return -1;
}
if (pid == 0) {
close(pipe_in[0]);
dup2(pipe_in[1], fileno(stdout));
close(pipe_in[1]); // XXX correct ?
close(pipe_out[1]);
dup2(pipe_out[0], fileno(stdin));
close(pipe_out[0]); // XXX correct ?
if (execvp(cmd, argv) == -1) {
log_warn("execpipe child: failed to execute %s %s : %d", cmd, argv, errno);
exit(1);
}
/* NOT REACHED */
}
pipes[0] = pipe_in[0];
pipes[1] = pipe_out[1];
return pid;
}
int
readbuf(int fd, uint8_t **out, int len) {
uint8_t buf[BUFMAX];
int outlen;
if (len > sizeof(buf)) {
log_warn("readbuf: len too big %d", len);
return -1;
}
if ((outlen = atomicio(read, fd, buf, len)) < 0) {
log_warn("readbuf: atomicio read error");
return -1;
}
if (outlen != len)
log_warn("readbuf: invalid atomicio read size %d, should be %d",
outlen, len);
*out = buf;
return outlen;
}
int
writebuf(uint8_t *buf, int fd, int len) {
int writelen;
if ((writelen = atomicio(vwrite, fd, buf, len)) < 0) {
log_warn("writebuf: atomicio write error");
return -1;
}
if (writelen < len)
log_warn("writebuf: incomplete write, %d on %d",
writelen, len);
return writelen;
}
int
readwrite(int ifd, int ofd, int len) {
char buf[BUFMAX];
int red, wrote;
red = atomicio(read, ifd, buf, len);
if (red < 0) {
log_warn("readwrite: atomicio read error");
return -1;
}
if (red != len)
log_warn("readbuf: invalid atomicio read size %d, should be %d",
red, len);
if ((wrote = atomicio(vwrite, ofd, buf, red)) < red) {
log_warn("readwrite: atomicio write error");
return -1;
}
return wrote;
}
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