106 lines
2.4 KiB
C
106 lines
2.4 KiB
C
/* prsvunix.c */
|
|
|
|
/* This file contains the UNIX-specific parts of the "elvprsv" program. */
|
|
|
|
#if OSK
|
|
#define ELVPRSV
|
|
#include "osk.c"
|
|
#else
|
|
#include <sys/stat.h>
|
|
#include <pwd.h>
|
|
#endif
|
|
|
|
/* This variable is used to add extra error messages for mail sent to root */
|
|
char *ps;
|
|
|
|
/* This function returns the login name of the owner of a file */
|
|
char *ownername(filename)
|
|
char *filename; /* name of a file */
|
|
{
|
|
struct stat st;
|
|
struct passwd *pw;
|
|
|
|
/* stat the file, to get its uid */
|
|
if (stat(filename, &st) < 0)
|
|
{
|
|
ps = "stat() failed";
|
|
return "root";
|
|
}
|
|
|
|
/* get the /etc/passwd entry for that user */
|
|
pw = getpwuid(st.st_uid);
|
|
if (!pw)
|
|
{
|
|
ps = "uid not found in password file";
|
|
return "root";
|
|
}
|
|
|
|
/* return the user's name */
|
|
return pw->pw_name;
|
|
}
|
|
|
|
|
|
/* This function sends a mail message to a given user, saying that a file
|
|
* has been preserved.
|
|
*/
|
|
void mail(user, file, when)
|
|
char *user; /* name of user who should receive the mail */
|
|
char *file; /* name of original text file that was preserved */
|
|
char *when; /* description of why the file was preserved */
|
|
{
|
|
char cmd[80];/* buffer used for constructing a "mail" command */
|
|
FILE *m, *popen(); /* stream used for giving text to the "mail" program */
|
|
char *base; /* basename of the file */
|
|
|
|
/* separate the directory name from the basename. */
|
|
for (base = file + strlen(file); --base > file && *base != SLASH; )
|
|
{
|
|
}
|
|
if (*base == SLASH)
|
|
{
|
|
*base++ = '\0';
|
|
}
|
|
|
|
/* for anonymous buffers, pretend the name was "foo" */
|
|
if (!strcmp(base, "*"))
|
|
{
|
|
base = "foo";
|
|
}
|
|
|
|
/* open a pipe to the "mail" program */
|
|
#if OSK
|
|
sprintf(cmd, "mail \"-s=%s preserved!\" %s", base, user);
|
|
#else /* ANY_UNIX */
|
|
sprintf(cmd, "mail %s >/dev/null 2>/dev/null", user);
|
|
#endif
|
|
m = popen(cmd, "w");
|
|
if (!m)
|
|
{
|
|
/* Can't send mail! Hope the user figures it out. */
|
|
return;
|
|
}
|
|
|
|
/* Tell the user that the file was preserved */
|
|
fprintf(m, "A version of your file \"%s%c%s\"\n", file, SLASH, base);
|
|
fprintf(m, "was preserved when %s.\n", when);
|
|
fprintf(m, "To recover this file, do the following:\n");
|
|
fprintf(m, "\n");
|
|
#if OSK
|
|
fprintf(m, " chd %s\n", file);
|
|
#else /* ANY_UNIX */
|
|
fprintf(m, " cd %s\n", file);
|
|
#endif
|
|
fprintf(m, " elvrec %s\n", base);
|
|
fprintf(m, "\n");
|
|
fprintf(m, "With fond wishes for a speedy recovery,\n");
|
|
fprintf(m, " Elvis\n");
|
|
if (ps)
|
|
{
|
|
fprintf(m, "\nP.S. %s\n", ps);
|
|
ps = (char *)0;
|
|
}
|
|
|
|
/* close the stream */
|
|
pclose(m);
|
|
}
|