1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
#include "write.h"
static int wri_can_write(char *path){
int fd, len=strlen(path)+strlen(_PATH_DEV)+1;
char *totalpath=(char*)malloc(sizeof(char)*len);
strncpy(totalpath, _PATH_DEV, strlen(_PATH_DEV)+1);
strncat(totalpath, path, strlen(path)+1);
fd=open(totalpath, O_WRONLY);
if(fd<0) {
perror(totalpath);
return 0;
}
else return isatty(fd);
}
int wri_do_write(char *user, char *line, char *message){
int cmdlen=(strlen("write ")+strlen(user)+1+strlen(line)+1);
char *cmd=(char*)malloc(sizeof(char)*cmdlen);
FILE *dest;
printf("can i write to %s?", line);
if(!wri_can_write(line)) {
fprintf(stderr, "%s: warning, not writing to %s on %s\n",
g_config.progname, user, line);
return -1;
}
snprintf(cmd, cmdlen, "write %s %s", user, line);
dest=popen(cmd, "w");
fprintf(dest, "%s", message);
if(!g_config.no_newline)fprintf(dest, "\n");
pclose(dest);
return 0;
}
|
