int
main(int argc, char *argv[])
{
return ls_main(argc, argv);
/* NOTREACHED */
}
int main(int argc,char *argv[])
{
ls_main(argc, argv);
//已经把问题1 3 4 解决 1.3版
}
int
main(int argc, char *argv[])
{
return ls_main(argc, argv);
}
FILE *
ftpd_popen(char *program, char *type)
{
char *cp;
FILE *iop;
int argc, gargc, pdes[2], pid;
char **pop, *argv[MAXUSRARGS], *gargv[MAXGLOBARGS];
if (((*type != 'r') && (*type != 'w')) || type[1])
return (NULL);
if (!pids) {
if ((fds = getdtablesize()) <= 0)
return (NULL);
if ((pids = malloc(fds * sizeof(int))) == NULL)
return (NULL);
memset(pids, 0, fds * sizeof(int));
}
if (pipe(pdes) < 0)
return (NULL);
/* break up string into pieces */
for (argc = 0, cp = program; argc < MAXUSRARGS; cp = NULL) {
if (!(argv[argc++] = strtok(cp, " \t\n")))
break;
}
argv[argc - 1] = NULL;
/* glob each piece */
gargv[0] = argv[0];
for (gargc = argc = 1; argv[argc] && gargc < (MAXGLOBARGS-1); argc++) {
glob_t gl;
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE;
memset(&gl, 0, sizeof(gl));
gl.gl_matchc = MAXGLOBARGS;
flags |= GLOB_LIMIT;
if (glob(argv[argc], flags, NULL, &gl))
gargv[gargc++] = strdup(argv[argc]);
else if (gl.gl_pathc > 0) {
for (pop = gl.gl_pathv; *pop && gargc < (MAXGLOBARGS-1);
pop++)
gargv[gargc++] = strdup(*pop);
}
globfree(&gl);
}
gargv[gargc] = NULL;
iop = NULL;
fflush(NULL);
pid = (strcmp(gargv[0], _PATH_LS) == 0) ? fork() : vfork();
switch(pid) {
case -1: /* error */
(void)close(pdes[0]);
(void)close(pdes[1]);
goto pfree;
/* NOTREACHED */
case 0: /* child */
if (*type == 'r') {
if (pdes[1] != STDOUT_FILENO) {
dup2(pdes[1], STDOUT_FILENO);
(void)close(pdes[1]);
}
dup2(STDOUT_FILENO, STDERR_FILENO); /* stderr too! */
(void)close(pdes[0]);
} else {
if (pdes[0] != STDIN_FILENO) {
dup2(pdes[0], STDIN_FILENO);
(void)close(pdes[0]);
}
(void)close(pdes[1]);
}
/* Drop privileges before proceeding */
if (getuid() != geteuid() && setuid(geteuid()) < 0)
_exit(1);
if (strcmp(gargv[0], _PATH_LS) == 0) {
/* Reset getopt for ls_main() */
optreset = optind = optopt = 1;
/* Close syslogging to remove pwd.db missing msgs */
closelog();
/* Trigger to sense new /etc/localtime after chroot */
if (getenv("TZ") == NULL) {
setenv("TZ", "", 0);
tzset();
unsetenv("TZ");
tzset();
}
exit(ls_main(gargc, gargv));
}
execv(gargv[0], gargv);
_exit(1);
}
/* parent; assume fdopen can't fail... */
if (*type == 'r') {
iop = fdopen(pdes[0], type);
(void)close(pdes[1]);
} else {
iop = fdopen(pdes[1], type);
(void)close(pdes[0]);
}
pids[fileno(iop)] = pid;
pfree: for (argc = 1; gargv[argc] != NULL; argc++)
free(gargv[argc]);
return (iop);
}
FILE *
ftpd_popen(char *argv[], const char *ptype, int stderrfd)
{
FILE *iop;
int argc, pdes[2], pid, isls;
char **pop;
StringList *sl;
iop = NULL;
isls = 0;
if ((*ptype != 'r' && *ptype != 'w') || ptype[1])
return (NULL);
if (!pids) {
if ((fds = getdtablesize()) <= 0)
return (NULL);
if ((pids = (int *)malloc((u_int)(fds * sizeof(int)))) == NULL)
return (NULL);
memset(pids, 0, fds * sizeof(int));
}
if (pipe(pdes) < 0)
return (NULL);
if ((sl = sl_init()) == NULL)
goto pfree;
/* glob each piece */
if (sl_add(sl, ftpd_strdup(argv[0])) == -1)
goto pfree;
for (argc = 1; argv[argc]; argc++) {
glob_t gl;
int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE|GLOB_LIMIT;
memset(&gl, 0, sizeof(gl));
if (glob(argv[argc], flags, NULL, &gl)) {
if (sl_add(sl, ftpd_strdup(argv[argc])) == -1) {
globfree(&gl);
goto pfree;
}
} else {
for (pop = gl.gl_pathv; *pop; pop++) {
if (sl_add(sl, ftpd_strdup(*pop)) == -1) {
globfree(&gl);
goto pfree;
}
}
}
globfree(&gl);
}
if (sl_add(sl, NULL) == -1)
goto pfree;
#ifndef NO_INTERNAL_LS
isls = (strcmp(sl->sl_str[0], INTERNAL_LS) == 0);
#endif
pid = isls ? fork() : vfork();
switch (pid) {
case -1: /* error */
(void)close(pdes[0]);
(void)close(pdes[1]);
goto pfree;
/* NOTREACHED */
case 0: /* child */
if (*ptype == 'r') {
if (pdes[1] != STDOUT_FILENO) {
dup2(pdes[1], STDOUT_FILENO);
(void)close(pdes[1]);
}
if (stderrfd == -1)
(void)close(STDERR_FILENO);
else
dup2(stderrfd, STDERR_FILENO);
(void)close(pdes[0]);
} else {
if (pdes[0] != STDIN_FILENO) {
dup2(pdes[0], STDIN_FILENO);
(void)close(pdes[0]);
}
(void)close(pdes[1]);
}
#ifndef NO_INTERNAL_LS
if (isls) { /* use internal ls */
optreset = optind = optopt = 1;
closelog();
exit(ls_main(sl->sl_cur - 1, sl->sl_str));
}
#endif
execv(sl->sl_str[0], sl->sl_str);
_exit(1);
}
/* parent; assume fdopen can't fail... */
if (*ptype == 'r') {
iop = fdopen(pdes[0], ptype);
(void)close(pdes[1]);
} else {
iop = fdopen(pdes[1], ptype);
(void)close(pdes[0]);
}
pids[fileno(iop)] = pid;
pfree:
if (sl)
sl_free(sl, 1);
return (iop);
}
FILE *
ftpd_popen (char *program, const char *type)
{
char *cp;
FILE *iop;
struct file_pid *fpid;
int argc, gargc, pdes[2], pid;
char **pop, *argv[MAX_ARGC], *gargv[MAX_GARGC];
if (((*type != 'r') && (*type != 'w')) || type[1])
return (NULL);
if (pipe (pdes) < 0)
return (NULL);
/* break up string into pieces */
for (argc = 0, cp = program; argc < MAX_ARGC - 1; cp = NULL, argc++)
if (!(argv[argc] = strtok (cp, " \t\n")))
break;
argv[MAX_ARGC - 1] = NULL;
/* glob each piece */
gargv[0] = argv[0];
for (gargc = argc = 1; argv[argc]; argc++)
{
glob_t gl;
int flags = GLOB_NOCHECK;
#ifdef GLOB_BRACE
flags |= GLOB_BRACE;
#endif
#ifdef GLOB_QUOTE
flags |= GLOB_QUOTE;
#endif
#ifdef GLOB_TILDE
flags |= GLOB_TILDE;
#endif
memset (&gl, 0, sizeof (gl));
if (glob (argv[argc], flags, NULL, &gl))
gargv[gargc++] = strdup (argv[argc]);
else
for (pop = gl.gl_pathv; *pop; pop++)
gargv[gargc++] = strdup (*pop);
globfree (&gl);
}
gargv[gargc] = NULL;
iop = NULL;
#ifdef WITH_LIBLS
/* Do not use vfork() for internal ls. */
pid = (strcmp (gargv[0], "/bin/ls") == 0) ? fork () : vfork ();
switch (pid)
#else
switch (pid = vfork ())
#endif
{
case -1: /* error */
close (pdes[0]);
close (pdes[1]);
goto pfree;
case 0: /* child */
if (*type == 'r')
{
if (pdes[1] != STDOUT_FILENO)
{
dup2 (pdes[1], STDOUT_FILENO);
close (pdes[1]);
}
dup2 (STDOUT_FILENO, STDERR_FILENO); /* stderr too! */
close (pdes[0]);
}
else
{
if (pdes[0] != STDIN_FILENO)
{
dup2 (pdes[0], STDIN_FILENO);
close (pdes[0]);
}
close (pdes[1]);
}
#ifdef WITH_LIBLS
/* mvo: should this be a config-option? */
if (strcmp (gargv[0], "/bin/ls") == 0)
{
optind = 0;
exit (ls_main (gargc, gargv));
}
#endif
execv (gargv[0], gargv);
_exit (1);
}
/* parent; assume fdopen can't fail... */
if (*type == 'r')
{
iop = fdopen (pdes[0], type);
close (pdes[1]);
}
else
{
iop = fdopen (pdes[1], type);
close (pdes[0]);
}
fpid = (struct file_pid *) malloc (sizeof (struct file_pid));
if (fpid)
{
fpid->file = iop;
fpid->pid = pid;
fpid->next = file_pids;
file_pids = fpid;
}
pfree:for (argc = 1; gargv[argc] != NULL; argc++)
free (gargv[argc]);
return (iop);
}