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57 lines
948 B
57 lines
948 B
#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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int pager_in_use; |
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static void run_pager(const char *pager) |
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{ |
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execlp(pager, pager, NULL); |
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execl("/bin/sh", "sh", "-c", pager, 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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const char *pager = getenv("PAGER"); |
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if (!isatty(1)) |
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return; |
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if (!pager) |
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pager = "less"; |
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else if (!*pager || !strcmp(pager, "cat")) |
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return; |
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pager_in_use = 1; /* means we are emitting to terminal */ |
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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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setenv("LESS", "-RS", 0); |
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run_pager(pager); |
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die("unable to execute pager '%s'", pager); |
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exit(255); |
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}
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