Advanced Programming in the UNIX® Environment

ptg10805159

Section 18.9 Te rminal Identification 697

if ((ddp->d_name = strdup(dirname)) == NULL) {

free(ddp);

return;

}

ddp->d_next = NULL;

if (tail == NULL) {

head = ddp;

tail = ddp;

}else {

tail->d_next = ddp;

tail = ddp;

}

}

static void

cleanup(void)

{

struct devdir *ddp, *nddp;

ddp = head;

while (ddp != NULL) {

nddp = ddp->d_next;

free(ddp->d_name);

free(ddp);

ddp = nddp;

}

head = NULL;

tail = NULL;

}

static char *

searchdir(char *dirname, struct stat *fdstatp)

{

struct stat devstat;

DIR *dp;

int devlen;

struct dirent *dirp;

strcpy(pathname, dirname);

if ((dp = opendir(dirname)) == NULL)

return(NULL);

strcat(pathname, "/");

devlen = strlen(pathname);

while ((dirp = readdir(dp)) != NULL) {

strncpy(pathname + devlen, dirp->d_name,

_POSIX_PATH_MAX - devlen);

/*

*Skip aliases.

*/

if (strcmp(pathname, "/dev/stdin") == 0 ||