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vm: use fork/close/exec for calling editor (#358)

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To make sure that path is properly passed (no shell escapes etc).
This commit is contained in:
Marek Marczykowski 2011-10-17 02:08:53 +02:00
parent 0b89ef0987
commit b362605b0c
1 changed files with 30 additions and 8 deletions
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38
appvm/vm-file-editor.c
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@ -51,23 +51,45 @@ main()
char cmdbuf[512];
struct stat stat_pre, stat_post;
char *filename = get_filename();
int child, status, log_fd;
copy_file(filename);
if (stat(filename, &stat_pre)) {
perror("stat pre");
exit(1);
}
snprintf(cmdbuf, sizeof(cmdbuf),
"HOME=/home/user DISPLAY=:0 /usr/bin/mimeopen -n -M '%s' > /tmp/kde-open.log 2>&1 </dev/null",
filename);
if (system(cmdbuf))
switch (child = fork()) {
case -1:
perror("fork");
exit(1);
case 0:
close(0);
log_fd = open("/tmp/mimeopen.log", O_CREAT | O_APPEND, 0666);
if (log_fd == -1) {
perror("open /tmp/mimeopen.log");
exit(1);
}
dup2(log_fd, 1);
dup2(log_fd, 2);
close(log_fd);
setenv("HOME", "/home/user", 1);
setenv("DISPLAY", ":0", 1);
execl("/usr/bin/mimeopen", "mimeopen", "-n", "-M", filename);
perror("execl");
exit(1);
default:
waitpid(child, &status, 0);
if (status != 0) {
#ifdef USE_KDIALOG
system
("HOME=/home/user DISPLAY=:0 /usr/bin/kdialog --sorry 'Unable to handle mimetype of the requested file!' > /tmp/kdialog.log 2>&1 </dev/null");
system
("HOME=/home/user DISPLAY=:0 /usr/bin/kdialog --sorry 'Unable to handle mimetype of the requested file!' > /tmp/kdialog.log 2>&1 </dev/null");
#else
system
("HOME=/home/user DISPLAY=:0 /usr/bin/zenity --error --text 'Unable to handle mimetype of the requested file!' > /tmp/kdialog.log 2>&1 </dev/null");
system
("HOME=/home/user DISPLAY=:0 /usr/bin/zenity --error --text 'Unable to handle mimetype of the requested file!' > /tmp/kdialog.log 2>&1 </dev/null");
#endif
}
}
if (stat(filename, &stat_post)) {
perror("stat post");