projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 0f5e4452 KS |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | # | |
| 3 | ||
| 4 | /* | |
| 5 | * Mail -- a mail program | |
| 6 | * | |
| 7 | * Generally useful tty stuff. | |
| 8 | */ | |
| 9 | ||
| 10 | #include "rcv.h" | |
| 11 | #include <sgtty.h> | |
| 12 | ||
| 13 | static int c_erase; /* Current erase char */ | |
| 14 | static int c_kill; /* Current kill char */ | |
| 15 | ||
| 16 | /* | |
| 17 | * Read all relevant header fields. | |
| 18 | */ | |
| 19 | ||
| 20 | grabh(hp, gflags) | |
| 21 | struct header *hp; | |
| 22 | { | |
| 23 | struct sgttyb ttybuf; | |
| 24 | register int s; | |
| 25 | int (*savesigs[2])(), errs, set; | |
| 26 | ||
| 27 | errs = 0; | |
| 28 | set = 0; | |
| 29 | if (gtty(fileno(stdin), &ttybuf) < 0) { | |
| 30 | perror("gtty"); | |
| 31 | return(-1); | |
| 32 | } | |
| 33 | c_erase = ttybuf.sg_erase; | |
| 34 | c_kill = ttybuf.sg_kill; | |
| 35 | ttybuf.sg_erase = 0; | |
| 36 | ttybuf.sg_kill = 0; | |
| 37 | for (s = SIGINT; s <= SIGQUIT; s++) | |
| 38 | if ((savesigs[s-SIGINT] = signal(s, SIG_IGN)) == SIG_DFL) | |
| 39 | signal(s, SIG_DFL); | |
| 40 | if (gflags & GTO) { | |
| 41 | if (!set && hp->h_to != NOSTR) | |
| 42 | set++, stty(fileno(stdin), &ttybuf); | |
| 43 | hp->h_to = readtty("To: ", hp->h_to); | |
| 44 | if (hp->h_to != NOSTR) | |
| 45 | hp->h_seq++; | |
| 46 | } | |
| 47 | if (gflags & GSUBJ) { | |
| 48 | if (!set && hp->h_subj != NOSTR) | |
| 49 | set++, stty(fileno(stdin), &ttybuf); | |
| 50 | hp->h_subj = readtty("Subj: ", hp->h_subj); | |
| 51 | if (hp->h_subj != NOSTR) | |
| 52 | hp->h_seq++; | |
| 53 | } | |
| 54 | if (gflags & GCC) { | |
| 55 | if (!set && hp->h_cc != NOSTR) | |
| 56 | set++, stty(fileno(stdin), &ttybuf); | |
| 57 | hp->h_cc = readtty("Cc: ", hp->h_cc); | |
| 58 | if (hp->h_cc != NOSTR) | |
| 59 | hp->h_seq++; | |
| 60 | } | |
| 61 | ttybuf.sg_erase = c_erase; | |
| 62 | ttybuf.sg_kill = c_kill; | |
| 63 | if (set) | |
| 64 | stty(fileno(stdin), &ttybuf); | |
| 65 | ||
| 66 | out: | |
| 67 | for (s = SIGINT; s <= SIGQUIT; s++) | |
| 68 | signal(s, savesigs[s-SIGINT]); | |
| 69 | return(errs); | |
| 70 | } | |
| 71 | ||
| 72 | /* | |
| 73 | * Read up a header from standard input. | |
| 74 | * The source string has the preliminary contents to | |
| 75 | * be read. | |
| 76 | * | |
| 77 | */ | |
| 78 | ||
| 79 | char * | |
| 80 | readtty(pr, src) | |
| 81 | char pr[], src[]; | |
| 82 | { | |
| 83 | char canonb[BUFSIZ]; | |
| 84 | register int c; | |
| 85 | register char *cp, *cp2; | |
| 86 | ||
| 87 | fputs(pr, stdout); | |
| 88 | if (src != NOSTR) | |
| 89 | cp = copy(src, canonb); | |
| 90 | else | |
| 91 | cp = copy("", canonb); | |
| 92 | fputs(canonb, stdout); | |
| 93 | fflush(stdout); | |
| 94 | if ((cp2 = gets(cp)) == NOSTR || *cp2 == '\0') | |
| 95 | return(src); | |
| 96 | cp = canonb; | |
| 97 | cp2 = cp; | |
| 98 | while (*cp != '\0') { | |
| 99 | c = *cp++; | |
| 100 | if (c == c_erase) { | |
| 101 | if (cp2 == canonb) | |
| 102 | continue; | |
| 103 | if (cp2[-1] == '\\') { | |
| 104 | cp2[-1] = c; | |
| 105 | continue; | |
| 106 | } | |
| 107 | cp2--; | |
| 108 | continue; | |
| 109 | } | |
| 110 | if (c == c_kill) { | |
| 111 | if (cp2 == canonb) | |
| 112 | continue; | |
| 113 | if (cp2[-1] == '\\') { | |
| 114 | cp2[-1] = c; | |
| 115 | continue; | |
| 116 | } | |
| 117 | cp2 = canonb; | |
| 118 | continue; | |
| 119 | } | |
| 120 | *cp2++ = c; | |
| 121 | } | |
| 122 | *cp2 = '\0'; | |
| 123 | if (equal("", canonb)) | |
| 124 | return(NOSTR); | |
| 125 | return(savestr(canonb)); | |
| 126 | } |