rpm: cliutils.c Source File

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cliutils.c
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    00001 #include "system.h"
    00002 #if HAVE_MCHECK_H
    00003 #include <mcheck.h>
    00004 #endif
    00005 #include <errno.h>
    00006 #include <sys/wait.h>
    00007
    00008 #include <rpm/rpmlog.h>
    00009 #include <rpm/rpmlib.h>
    00010 #include <rpm/rpmfileutil.h>
    00011 #include <rpm/rpmmacro.h>
    00012 #include <rpm/rpmcli.h>
    00013 #include "cliutils.h"
    00014 #include "debug.h"
    00015
    00016 static pid_t pipeChild = 0;
    00017
    00018 RPM_GNUC_NORETURN
    00019 void argerror(const char * desc)
    00020 {
    00021     fprintf(stderr, _("%s: %s\n"), __progname, desc);
    00022     exit(EXIT_FAILURE);
    00023 }
    00024
    00025 static void printVersion(FILE * fp)
    00026 {
    00027     fprintf(fp, _("RPM version %s\n"), rpmEVR);
    00028 }
    00029
    00030 static void printBanner(FILE * fp)
    00031 {
    00032     fprintf(fp, _("Copyright (C) 1998-2002 - Red Hat, Inc.\n"));
    00033     fprintf(fp, _("This program may be freely redistributed under the terms of the GNU GPL\n"));
    00034 }
    00035
    00036 void printUsage(poptContext con, FILE * fp, int flags)
    00037 {
    00038     printVersion(fp);
    00039     printBanner(fp);
    00040     fprintf(fp, "\n");
    00041
    00042     if (rpmIsVerbose())
    00043         poptPrintHelp(con, fp, flags);
    00044     else
    00045         poptPrintUsage(con, fp, flags);
    00046 }
    00047
    00048 int initPipe(void)
    00049 {
    00050     int p[2];
    00051
    00052     if (pipe(p) < 0) {
    00053         fprintf(stderr, _("creating a pipe for --pipe failed: %m\n"));
    00054         return -1;
    00055     }
    00056
    00057     if (!(pipeChild = fork())) {
    00058         (void) signal(SIGPIPE, SIG_DFL);
    00059         (void) close(p[1]);
    00060         (void) dup2(p[0], STDIN_FILENO);
    00061         (void) close(p[0]);
    00062         (void) execl("/bin/sh", "/bin/sh", "-c", rpmcliPipeOutput, NULL);
    00063         fprintf(stderr, _("exec failed\n"));
    00064         exit(EXIT_FAILURE);
    00065     }
    00066
    00067     (void) close(p[0]);
    00068     (void) dup2(p[1], STDOUT_FILENO);
    00069     (void) close(p[1]);
    00070     return 0;
    00071 }
    00072
    00073 int finishPipe(void)
    00074 {
    00075     int rc = 0;
    00076     if (pipeChild) {
    00077         int status;
    00078         pid_t reaped;
    00079
    00080         (void) fclose(stdout);
    00081         do {
    00082             reaped = waitpid(pipeChild, &status, 0);
    00083         } while (reaped == -1 && errno == EINTR);
    00084
    00085         if (reaped == -1 || !WIFEXITED(status) || WEXITSTATUS(status))
    00086             rc = 1;
    00087     }
    00088     return rc;
    00089 }