BSD 3 development

[unix-history] / usr / src / cmd / msgs.c

/* #define CORY */
#include <stdio.h>
#include <sys/types.h>
#include <signal.h>
#include <sys/dir.h>
#include <sys/stat.h>
#include <ctype.h>

typedef char    bool;

FILE    *f;
bool    hdrs;
bool    qopt;
char    *sep;
bool    ruptible;
int     onintr();

main(argc, argv)
       int argc;
       char *argv[];
{
       char obuf[BUFSIZ];
       bool newrc, already, argfirst = 0;
       int rcfirst, lastmsg, firstmsg;
       int rcback = 0;                 /* amount to back off of rcfirst*/
       FILE *bounds, *msgsrc;
       int i, nextty;
       bool hush = 0;
       bool send = 0;

       ruptible = signal(SIGINT, SIG_IGN) == SIG_DFL;
       if (ruptible)
               signal(SIGINT, SIG_DFL);
       setbuf(stdout, obuf);
       argc--, argv++;
       while (argc >= 1) {
               if (isdigit(argv[0][0])) {
                       argfirst = 1;
                       rcfirst = atoi(argv[0]);
               } else switch (argv[0][1]) {
               
               case 'f':
                       hush++;
                       break;

               case 'q':
                       qopt++;
                       break;

               case 'h':
                       hdrs++;
                       break;

               case 's':
                       send++;
                       break;

               case '0':
               case '1':
               case '2':
               case '3':
               case '4':
               case '5':
               case '6':
               case '7':
               case '8':
               case '9':
                       rcback = atoi( &( argv[0][1] ) );
                       break;
               default:
                       fprintf(stderr, "usage: msgs [ -f ] [ number ]\n");
                       exit(1);
               }
               argc--, argv++;
       }
       if (!send) {
               setuid(getuid());
               if (chdir(getenv("HOME")) < 0)
                       perror(getenv("HOME")), exit(1);
               newrc = 0;
               msgsrc = fopen(".msgsrc", "r");
               nextty = 1;
               if (msgsrc != NULL) {
                       fscanf(msgsrc, "%d\n", &i);
                       fclose(msgsrc);
                       nextty = i;
                       if (!argfirst)
                               rcfirst = i - rcback;
               } else
                       newrc = 1;
               msgsrc = fopen(".msgsrc", "w");
               if (msgsrc == NULL)
                       perror(".msgsrc"), exit(1);
       }
       if (chdir("/usr/msgs") < 0)
               perror("/usr/msgs"), exit(1);
       bounds = fopen("bounds", "r");
       if (bounds == NULL) {
               FILE *d = fopen(".", "r");
               struct direct dirent;

               if (d == NULL)
                       perror("/usr/msgs"), exit(1);
               firstmsg = 25000;
               lastmsg = 0;
               while (fread(&dirent, sizeof dirent, 1, d) == 1) {
                       register char *cp = dirent.d_name;
                       register int i = 0;

                       if (dirent.d_ino == 0)
                               continue;
                       while (isdigit(*cp))
                               i = i * 10 + *cp++ - '0';
                       if (*cp)
                               continue;
                       if (i > lastmsg)
                               lastmsg = i;
                       if (i < firstmsg)
                               firstmsg = i;
               }
               if (firstmsg == 25000) {
                       firstmsg = 1;
                       lastmsg = 0;
               }
               fclose(d);
               if (send) {
                       unlink("bounds");
                       bounds = fopen("bounds", "w");
#ifdef CORY
                       chmod("bounds", 0644);
#else
                       chmod("bounds", 0666);
#endif
                       if (bounds == NULL)
                               perror("bounds"), exit(1);
                       fprintf(bounds, "%d %d\n", firstmsg, lastmsg);
                       fclose(bounds);
               }
       } else {
               fscanf(bounds, "%d %d\n", &firstmsg, &lastmsg);
               fclose(bounds);
       }
       if (send) {
               char newname[16];
               FILE *newm;

               sprintf(newname, "%d", lastmsg+1);
               bounds = fopen("bounds", "w");
               if (bounds == NULL)
                       perror("bounds"), exit(1);
               fprintf(bounds, "%d %d\n", firstmsg, lastmsg+1);
               fclose(bounds);
               newm = fopen(newname, "w");
               if (newm == NULL)
                       fprintf(stderr, "/usr/msgs/"), perror(newname), exit(1);
               chmod(newname, 0644);
               for (;;) {
                       register c;
                       c = getchar();
                       if (feof(stdin))
                               exit(0);
                       if (ferror(stdin))
                               exit(1);
                       putc(c, newm);
               }
       }
       if (!newrc)
               firstmsg = rcfirst;
       already = 0;
       for (i = firstmsg; i <= lastmsg; i++) {
               register int c;
               char inline[BUFSIZ];
               struct stat stbuf;
               char fname[16];

               sprintf(fname, "%d", i);
               f = fopen(fname, "r");
               if (f == NULL)
                       continue;
               if (qopt) {
                       fseek(msgsrc, (long) 0, 0);
                       fprintf(msgsrc, "%d\n", nextty);
                       fflush(msgsrc);
                       printf("There are new messages.\n");
                       exit(0);
               }
               if (already)
                       printf("\n");
               already = 1;
               fseek(msgsrc, (long) 0, 0);
               fprintf(msgsrc, "%d\n", nextty);
               fflush(msgsrc);
               printf("Message %d:\n", i);
               fgets(inline, sizeof inline, f);
               printf("%s", inline);
               if (fgets(inline, sizeof inline, f)) {
                       if (strcmp(inline, "To: msgs\n") != 0 && inline[0] != '\n')
                               printf("%s", inline);
                       if (fgets(inline, sizeof inline, f) && inline[0] != '\n')
                               printf("%s", inline);
               }
               c = getc(f);
               sep = "-";
               if (c == '\n')
                       c = getc(f);
               if (!feof(f))
                       printf("(%d more lines)", linecnt(f));
               if (hdrs) {
                       printf("\n-----\n");
                       fclose(f);
                       continue;
               }
               if (feof(f))
                       printf("(continue) [yq] ");
               else
                       printf(" type [ynq] ? ");
               fflush(stdout);
               inline[0] = 0;
               fgets(inline, sizeof inline, stdin);
               if (inline[0] == 0)
                       printf("\n");
               if (inline[0] == 'q')
                       exit(1);
               if (isdigit(inline[0])) {
                       sscanf(inline, "%d", &i);
                       printf("--Goto %d--\n", i);
                       i--;
                       fflush(stdout);
                               fclose(f);
                               continue;
               }
               if (inline[0] == 'n' || inline[0] == 'N') {
                       printf("--Flushed--\n");
                       fflush(stdout);
                       fclose(f);
                       if (i >= nextty)
                               nextty = i + 1;
                       continue;
               }
               if (ruptible)
                       signal(SIGINT, onintr);
               if (!feof(f))
                       for (;;) {
                               putchar(c);
                               c = getc(f);
                               if (feof(f))
                                       break;
                       }
               printf("--%s--\n", sep);
               if (i >= nextty)
                       nextty = i + 1;
               fflush(stdout);
               if (ruptible)
                       signal(SIGINT, SIG_DFL);
               fclose(f);
       }
       fseek(msgsrc, (long) 0, 0);
       fprintf(msgsrc, "%d\n", nextty);
       fclose(msgsrc);
       if (qopt)
               exit(0);
       if (!already && !hush)
               printf("No messages.\n");
       exit(0);
}

onintr()
{

       sep = "Skip";
       printf("\n");
       fseek(f, (long) 0, 2);
}

linecnt(f)
       FILE *f;
{
       off_t ftell();
       off_t oldpos = ftell(f);
       int l = 0;
       char lbuf[BUFSIZ];

       while (fgets(lbuf, sizeof lbuf, f))
               l++;
       clearerr(f);
       fseek(f, oldpos, 0);
       return (l);
}