projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 95d6acb1 WJ |
1 | /* prsvunix.c */ |
| 2 | ||
| 3 | /* This file contains the UNIX-specific parts of the "elvprsv" program. */ | |
| 4 | ||
| 5 | #if OSK | |
| 6 | #define ELVPRSV | |
| 7 | #include "osk.c" | |
| 8 | #else | |
| 9 | #include <sys/stat.h> | |
| 10 | #include <pwd.h> | |
| 11 | #endif | |
| 12 | #ifndef __386BSD__ | |
| 13 | extern struct passwd *getpwuid(); | |
| 14 | #endif | |
| 15 | ||
| 16 | /* This variable is used to add extra error messages for mail sent to root */ | |
| 17 | char *ps; | |
| 18 | ||
| 19 | /* This function returns the login name of the owner of a file */ | |
| 20 | char *ownername(filename) | |
| 21 | char *filename; /* name of a file */ | |
| 22 | { | |
| 23 | struct stat st; | |
| 24 | struct passwd *pw; | |
| 25 | ||
| 26 | /* stat the file, to get its uid */ | |
| 27 | if (stat(filename, &st) < 0) | |
| 28 | { | |
| 29 | ps = "stat() failed"; | |
| 30 | return "root"; | |
| 31 | } | |
| 32 | ||
| 33 | /* get the /etc/passwd entry for that user */ | |
| 34 | pw = getpwuid(st.st_uid); | |
| 35 | if (!pw) | |
| 36 | { | |
| 37 | ps = "uid not found in password file"; | |
| 38 | return "root"; | |
| 39 | } | |
| 40 | ||
| 41 | /* return the user's name */ | |
| 42 | return pw->pw_name; | |
| 43 | } | |
| 44 | ||
| 45 | ||
| 46 | /* This function sends a mail message to a given user, saying that a file | |
| 47 | * has been preserved. | |
| 48 | */ | |
| 49 | void mail(user, file, when) | |
| 50 | char *user; /* name of user who should receive the mail */ | |
| 51 | char *file; /* name of original text file that was preserved */ | |
| 52 | char *when; /* description of why the file was preserved */ | |
| 53 | { | |
| 54 | char cmd[80];/* buffer used for constructing a "mail" command */ | |
| 55 | FILE *m, *popen(); /* stream used for giving text to the "mail" program */ | |
| 56 | char *base; /* basename of the file */ | |
| 57 | ||
| 58 | /* separate the directory name from the basename. */ | |
| 59 | for (base = file + strlen(file); --base > file && *base != SLASH; ) | |
| 60 | { | |
| 61 | } | |
| 62 | if (*base == SLASH) | |
| 63 | { | |
| 64 | *base++ = '\0'; | |
| 65 | } | |
| 66 | ||
| 67 | /* for anonymous buffers, pretend the name was "foo" */ | |
| 68 | if (!strcmp(base, "*")) | |
| 69 | { | |
| 70 | base = "foo"; | |
| 71 | } | |
| 72 | ||
| 73 | /* open a pipe to the "mail" program */ | |
| 74 | #if OSK | |
| 75 | sprintf(cmd, "mail \"-s=%s preserved!\" %s", base, user); | |
| 76 | #else /* ANY_UNIX */ | |
| 77 | sprintf(cmd, "mail %s >/dev/null 2>/dev/null", user); | |
| 78 | #endif | |
| 79 | m = popen(cmd, "w"); | |
| 80 | if (!m) | |
| 81 | { | |
| 82 | /* Can't send mail! Hope the user figures it out. */ | |
| 83 | return; | |
| 84 | } | |
| 85 | ||
| 86 | /* Tell the user that the file was preserved */ | |
| 87 | fprintf(m, "A version of your file \"%s%c%s\"\n", file, SLASH, base); | |
| 88 | fprintf(m, "was preserved when %s.\n", when); | |
| 89 | fprintf(m, "To recover this file, do the following:\n"); | |
| 90 | fprintf(m, "\n"); | |
| 91 | #if OSK | |
| 92 | fprintf(m, " chd %s\n", file); | |
| 93 | #else /* ANY_UNIX */ | |
| 94 | fprintf(m, " cd %s\n", file); | |
| 95 | #endif | |
| 96 | fprintf(m, " elvisrecover %s\n", base); | |
| 97 | fprintf(m, "\n"); | |
| 98 | fprintf(m, "With fond wishes for a speedy recovery,\n"); | |
| 99 | fprintf(m, " Elvis\n"); | |
| 100 | if (ps) | |
| 101 | { | |
| 102 | fprintf(m, "\nP.S. %s\n", ps); | |
| 103 | ps = (char *)0; | |
| 104 | } | |
| 105 | ||
| 106 | /* close the stream */ | |
| 107 | pclose(m); | |
| 108 | } |