tempfiles.c

unix环境高级编程的源代码

#include    "ourhdr.h"

int
main(void)
{
    char    name[L_tmpnam], line[MAXLINE];
    FILE    *fp;

    printf("%s\n", tmpnam(NULL));        /* first temp name */

    tmpnam(name);                        /* second temp name */
    printf("%s\n", name);

    if ( (fp = tmpfile()) == NULL)        /* create temp file */
        err_sys("tmpfile error");
    fputs("one line of output\n", fp);    /* write to temp file */
    rewind(fp);                            /* then read it back */
    if (fgets(line, sizeof(line), fp) == NULL)
        err_sys("fgets error");
    fputs(line, stdout);                /* print the line we wrote */

    exit(0);
}