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