elks-enhanced - XT-Emporium

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/*
 * lp 1.4 - Send file to the lineprinter
 * Author: Kees J. Bot 3 Dec 1989
 */
#define nil 0
#include <sys/types.h>
#include <stdio.h>
#include <limits.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <sys/wait.h>

const char LPD1[] = "/bin/lpd"; /* Proper place of lpd */

void
report(const char *mess)
{
    fprintf(stderr, "lp: %s: %s\n", mess, strerror(errno));
}

void
fatal(const char *mess)
{
    report(mess);
    exit(1);
}

void
lp(char *file)
{
    /* Start the lpd daemon giving it the file to spool and print. */
    int pid, status;

    if (file[0] != '/' || (pid = vfork()) == 0) {
        execl(LPD1, LPD1, file, (char *)nil);
        fatal(LPD1);
    }

    if (pid < 0)
        fatal("can't fork");

    if (waitpid(pid, &status, 0) == -1)
        fatal("wait");

    if (status != 0)
        exit(1);
}

char path[PATH_MAX];
int cwdsize;

int
main(int argc, char **argp)
{
    int e = 0;
    char *file;

    if (argc <= 1)
        lp("stdin");

    /* Lpd requires full path names, so find out where we are. */
    if (getcwd(path, sizeof(path)) == nil)
        fatal("Can't determine current directory");

    cwdsize = strlen(path);

    /* Hand each file to lpd. */
    while ((file = *++argp) != nil) {

        close(0);

        if (open(file, O_RDONLY) != 0) {
            report(file);
            e = 1;
            continue;
        }
        if (file[0] == '/') {
            lp(file);
            continue;
        }
        if (cwdsize + 1 + strlen(file) + 1 > sizeof(path)) {
            fprintf(stderr,
                    "lp: full pathname of %s is too long\n",
                    file);
            e = 1;
            continue;
        }
        path[cwdsize] = '/';
        strcpy(path + cwdsize + 1, file);

        lp(path);
    }
    exit(e);
}

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