projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 80741a9f KS |
1 | # |
| 2 | ||
| 3 | /* | |
| 4 | * Mail -- a mail program | |
| 5 | * | |
| 6 | * Generally useful tty stuff. | |
| 7 | */ | |
| 8 | ||
| 9 | #include "rcv.h" | |
| 10 | #include <sgtty.h> | |
| 11 | ||
| 419b1e01 | 12 | static char *SccsId = "@(#)tty.c 1.2 %G%"; |
| 80741a9f KS |
13 | |
| 14 | static int c_erase; /* Current erase char */ | |
| 15 | static int c_kill; /* Current kill char */ | |
| 16 | #ifndef TIOCSTI | |
| 17 | static int ttyset; /* We must now do erase/kill */ | |
| 18 | #endif | |
| 19 | ||
| 20 | /* | |
| 21 | * Read all relevant header fields. | |
| 22 | */ | |
| 23 | ||
| 24 | grabh(hp, gflags) | |
| 25 | struct header *hp; | |
| 26 | { | |
| 27 | struct sgttyb ttybuf; | |
| 28 | #ifndef TIOCSTI | |
| 29 | int (*savesigs[2])(); | |
| 30 | #endif | |
| 31 | register int s; | |
| 32 | int errs; | |
| 33 | ||
| 34 | errs = 0; | |
| 35 | #ifndef TIOCSTI | |
| 36 | ttyset = 0; | |
| 37 | #endif | |
| 38 | if (gtty(fileno(stdin), &ttybuf) < 0) { | |
| 39 | perror("gtty"); | |
| 40 | return(-1); | |
| 41 | } | |
| 42 | c_erase = ttybuf.sg_erase; | |
| 43 | c_kill = ttybuf.sg_kill; | |
| 44 | #ifndef TIOCSTI | |
| 45 | ttybuf.sg_erase = 0; | |
| 46 | ttybuf.sg_kill = 0; | |
| 47 | for (s = SIGINT; s <= SIGQUIT; s++) | |
| 48 | if ((savesigs[s-SIGINT] = signal(s, SIG_IGN)) == SIG_DFL) | |
| 49 | signal(s, SIG_DFL); | |
| 50 | #endif | |
| 51 | if (gflags & GTO) { | |
| 52 | #ifndef TIOCSTI | |
| 53 | if (!ttyset && hp->h_to != NOSTR) | |
| 54 | ttyset++, stty(fileno(stdin), &ttybuf); | |
| 55 | #endif | |
| 56 | hp->h_to = readtty("To: ", hp->h_to); | |
| 57 | if (hp->h_to != NOSTR) | |
| 58 | hp->h_seq++; | |
| 59 | } | |
| 60 | if (gflags & GSUBJECT) { | |
| 61 | #ifndef TIOCSTI | |
| 62 | if (!ttyset && hp->h_subject != NOSTR) | |
| 63 | ttyset++, stty(fileno(stdin), &ttybuf); | |
| 64 | #endif | |
| 65 | hp->h_subject = readtty("Subject: ", hp->h_subject); | |
| 66 | if (hp->h_subject != NOSTR) | |
| 67 | hp->h_seq++; | |
| 68 | } | |
| 69 | if (gflags & GCC) { | |
| 70 | #ifndef TIOCSTI | |
| 71 | if (!ttyset && hp->h_cc != NOSTR) | |
| 72 | ttyset++, stty(fileno(stdin), &ttybuf); | |
| 73 | #endif | |
| 74 | hp->h_cc = readtty("Cc: ", hp->h_cc); | |
| 75 | if (hp->h_cc != NOSTR) | |
| 76 | hp->h_seq++; | |
| 77 | } | |
| 78 | if (gflags & GBCC) { | |
| 79 | #ifndef TIOCSTI | |
| 80 | if (!ttyset && hp->h_bcc != NOSTR) | |
| 81 | ttyset++, stty(fileno(stdin), &ttybuf); | |
| 82 | #endif | |
| 83 | hp->h_bcc = readtty("Bcc: ", hp->h_bcc); | |
| 84 | if (hp->h_bcc != NOSTR) | |
| 85 | hp->h_seq++; | |
| 86 | } | |
| 87 | #ifndef TIOCSTI | |
| 88 | ttybuf.sg_erase = c_erase; | |
| 89 | ttybuf.sg_kill = c_kill; | |
| 90 | if (ttyset) | |
| 91 | stty(fileno(stdin), &ttybuf); | |
| 92 | for (s = SIGINT; s <= SIGQUIT; s++) | |
| 93 | signal(s, savesigs[s-SIGINT]); | |
| 94 | #endif | |
| 95 | return(errs); | |
| 96 | } | |
| 97 | ||
| 98 | /* | |
| 99 | * Read up a header from standard input. | |
| 100 | * The source string has the preliminary contents to | |
| 101 | * be read. | |
| 102 | * | |
| 103 | */ | |
| 104 | ||
| 105 | char * | |
| 106 | readtty(pr, src) | |
| 107 | char pr[], src[]; | |
| 108 | { | |
| 109 | char canonb[BUFSIZ]; | |
| 110 | int c, ch; | |
| 111 | register char *cp, *cp2; | |
| 112 | ||
| 113 | fputs(pr, stdout); fflush(stdout); | |
| 114 | if (src != NOSTR && strlen(src) > BUFSIZ - 2) { | |
| 115 | printf("too long to edit\n"); | |
| 116 | return(src); | |
| 117 | } | |
| 118 | #ifndef TIOCSTI | |
| 119 | if (src != NOSTR) | |
| 120 | cp = copy(src, canonb); | |
| 121 | else | |
| 122 | cp = copy("", canonb); | |
| 123 | fputs(canonb, stdout); | |
| 124 | fflush(stdout); | |
| 125 | #else | |
| 126 | for (cp = src; c = *cp; cp++) { | |
| 127 | if (c == c_erase || c == c_kill) { | |
| 128 | ch = '\\'; | |
| 129 | ioctl(0, TIOCSTI, &ch); | |
| 130 | } | |
| 131 | ioctl(0, TIOCSTI, &c); | |
| 132 | } | |
| 133 | cp = canonb; | |
| 419b1e01 | 134 | *cp = 0; |
| 80741a9f KS |
135 | #endif |
| 136 | cp2 = fgets(cp, BUFSIZ - (cp - canonb), stdin); | |
| 419b1e01 KS |
137 | cp = index(canonb, '\n'); |
| 138 | if (cp != NOSTR) | |
| 139 | *cp = 0; | |
| 80741a9f KS |
140 | #ifndef TIOCSTI |
| 141 | if (cp2 == NOSTR || *cp2 == '\0') | |
| 142 | return(src); | |
| 143 | cp = cp2; | |
| 144 | if (!ttyset) | |
| 145 | return(strlen(canonb) > 0 ? savestr(canonb) : NOSTR); | |
| 146 | while (*cp != '\0') { | |
| 147 | c = *cp++; | |
| 148 | if (c == c_erase) { | |
| 149 | if (cp2 == canonb) | |
| 150 | continue; | |
| 151 | if (cp2[-1] == '\\') { | |
| 152 | cp2[-1] = c; | |
| 153 | continue; | |
| 154 | } | |
| 155 | cp2--; | |
| 156 | continue; | |
| 157 | } | |
| 158 | if (c == c_kill) { | |
| 159 | if (cp2 == canonb) | |
| 160 | continue; | |
| 161 | if (cp2[-1] == '\\') { | |
| 162 | cp2[-1] = c; | |
| 163 | continue; | |
| 164 | } | |
| 165 | cp2 = canonb; | |
| 166 | continue; | |
| 167 | } | |
| 168 | *cp2++ = c; | |
| 169 | } | |
| 170 | *cp2 = '\0'; | |
| 171 | #endif | |
| 172 | if (equal("", canonb)) | |
| 173 | return(NOSTR); | |
| 174 | return(savestr(canonb)); | |
| 175 | } |