1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)edit.c 5.15 (Berkeley) 06/25/90"; 10 #endif /* not lint */ 11 12 #include "rcv.h" 13 #include <sys/stat.h> 14 15 /* 16 * Mail -- a mail program 17 * 18 * Perform message editing functions. 19 */ 20 21 /* 22 * Edit a message list. 23 */ 24 25 editor(msgvec) 26 int *msgvec; 27 { 28 29 return edit1(msgvec, 'e'); 30 } 31 32 /* 33 * Invoke the visual editor on a message list. 34 */ 35 36 visual(msgvec) 37 int *msgvec; 38 { 39 40 return edit1(msgvec, 'v'); 41 } 42 43 /* 44 * Edit a message by writing the message into a funnily-named file 45 * (which should not exist) and forking an editor on it. 46 * We get the editor from the stuff above. 47 */ 48 edit1(msgvec, type) 49 int *msgvec; 50 char type; 51 { 52 register int c; 53 int i; 54 FILE *fp; 55 register struct message *mp; 56 off_t size; 57 58 /* 59 * Deal with each message to be edited . . . 60 */ 61 for (i = 0; msgvec[i] && i < msgCount; i++) { 62 sig_t sigint; 63 64 if (i > 0) { 65 char buf[100]; 66 char *p; 67 68 printf("Edit message %d [ynq]? ", msgvec[i]); 69 if (fgets(buf, sizeof buf, stdin) == 0) 70 break; 71 for (p = buf; *p == ' ' || *p == '\t'; p++) 72 ; 73 if (*p == 'q') 74 break; 75 if (*p == 'n') 76 continue; 77 } 78 dot = mp = &message[msgvec[i] - 1]; 79 touch(mp); 80 sigint = signal(SIGINT, SIG_IGN); 81 fp = run_editor(setinput(mp), mp->m_size, type, readonly); 82 if (fp != NULL) { 83 (void) fseek(otf, (long) 0, 2); 84 size = ftell(otf); 85 mp->m_block = blockof(size); 86 mp->m_offset = offsetof(size); 87 mp->m_size = fsize(fp); 88 mp->m_lines = 0; 89 mp->m_flag |= MODIFY; 90 rewind(fp); 91 while ((c = getc(fp)) != EOF) { 92 if (c == '\n') 93 mp->m_lines++; 94 if (putc(c, otf) == EOF) 95 break; 96 } 97 if (ferror(otf)) 98 perror("/tmp"); 99 (void) Fclose(fp); 100 } 101 (void) signal(SIGINT, sigint); 102 } 103 return 0; 104 } 105 106 /* 107 * Run an editor on the file at "fpp" of "size" bytes, 108 * and return a new file pointer. 109 * Signals must be handled by the caller. 110 * "Type" is 'e' for _PATH_EX, 'v' for _PATH_VI. 111 */ 112 FILE * 113 run_editor(fp, size, type, readonly) 114 register FILE *fp; 115 off_t size; 116 char type; 117 { 118 register FILE *nf = NULL; 119 register int t; 120 time_t modtime; 121 char *edit; 122 struct stat statb; 123 extern char tempEdit[]; 124 125 if ((t = creat(tempEdit, readonly ? 0400 : 0600)) < 0) { 126 perror(tempEdit); 127 goto out; 128 } 129 if ((nf = Fdopen(t, "w")) == NULL) { 130 perror(tempEdit); 131 (void) unlink(tempEdit); 132 goto out; 133 } 134 if (size >= 0) 135 while (--size >= 0 && (t = getc(fp)) != EOF) 136 (void) putc(t, nf); 137 else 138 while ((t = getc(fp)) != EOF) 139 (void) putc(t, nf); 140 (void) fflush(nf); 141 if (fstat(fileno(nf), &statb) < 0) 142 modtime = 0; 143 else 144 modtime = statb.st_mtime; 145 if (ferror(nf)) { 146 (void) Fclose(nf); 147 perror(tempEdit); 148 (void) unlink(tempEdit); 149 nf = NULL; 150 goto out; 151 } 152 if (Fclose(nf) < 0) { 153 perror(tempEdit); 154 (void) unlink(tempEdit); 155 nf = NULL; 156 goto out; 157 } 158 nf = NULL; 159 if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NOSTR) 160 edit = type == 'e' ? _PATH_EX : _PATH_VI; 161 if (run_command(edit, 0, -1, -1, tempEdit, NOSTR) < 0) { 162 (void) unlink(tempEdit); 163 goto out; 164 } 165 /* 166 * If in read only mode or file unchanged, just remove the editor 167 * temporary and return. 168 */ 169 if (readonly) { 170 (void) unlink(tempEdit); 171 goto out; 172 } 173 if (stat(tempEdit, &statb) < 0) { 174 perror(tempEdit); 175 goto out; 176 } 177 if (modtime == statb.st_mtime) { 178 (void) unlink(tempEdit); 179 goto out; 180 } 181 /* 182 * Now switch to new file. 183 */ 184 if ((nf = Fopen(tempEdit, "a+")) == NULL) { 185 perror(tempEdit); 186 (void) unlink(tempEdit); 187 goto out; 188 } 189 (void) unlink(tempEdit); 190 out: 191 return nf; 192 } 193