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f67b45f862
This introduces the new function void setup_pager(void); to set up output to be written through a pager applocation. All in preparation for doing the simple scripts in C. Signed-off-by: Linus Torvalds <torvalds@osdl.org> Signed-off-by: Junio C Hamano <junkio@cox.net>
49 lines
701 B
C
49 lines
701 B
C
#include "cache.h"
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/*
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* This is split up from the rest of git so that we might do
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* something different on Windows, for example.
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*/
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static void run_pager(void)
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{
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const char *prog = getenv("PAGER");
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if (!prog)
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prog = "less";
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setenv("LESS", "-S", 0);
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execlp(prog, prog, NULL);
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}
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void setup_pager(void)
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{
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pid_t pid;
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int fd[2];
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if (!isatty(1))
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return;
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if (pipe(fd) < 0)
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return;
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pid = fork();
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if (pid < 0) {
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* return in the child */
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if (!pid) {
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dup2(fd[1], 1);
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close(fd[0]);
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close(fd[1]);
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return;
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}
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/* The original process turns into the PAGER */
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dup2(fd[0], 0);
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close(fd[0]);
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close(fd[1]);
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run_pager();
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exit(255);
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}
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